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MITZ-14FAM
HYDROLOGY & HYDRAULIC
CALCULATIONS
for
VALLEY MEDICAL CENTER
PHASE II PARKING GARAGE
Job No. 8840.103
.0
fiYAL I
by
N.G. JACOBSON & ASSOCIATES, INC.
520 Pike Street, Suite 1620
Seattle, Washington 98101
(206)624-7863
29 June 1990
(Originally submitted 19 June 1990)
k-O-u8
TABLE OF CONTENTS
1
Site Report
GeneralIntroduction......................................................................................................... 2
Hvdroloev & Hvdraulic Calculations..............................................................................3
On -site Drainage Analysis................................................................................................ 4
DownstreamAnalysis........................................................................................................ 5
Conclusion........................................................................................................................... 6
HydrologicRunoff Summary ........................................................................................... 7
Hydraulic Pipe Sizing
' East Surface Parking Storm System................................................................................ 9
ISanta Barbara Urban Hydrograph Input Calculations
OverallSite Data................................................................................................................10
Existing Pre-developed.................................................................
ProposedDeveloped.............................................................................................12
' 1.) Existing Phase I Parking Garage ........................... ...................................................14
2.) Existing Site w/out Phase I Parking Garage...........................................................14
3.) Existing Phase I Parking Garage w/ Level Pool Routing.....................................15
4.) Proposed Phase I & H Parking Garage Only..........................................................17
5.) Proposed Orifice Resizing w/ Routed Developed Garage Flow........................18
6.) Proposed Site w/out Phase I & H Parking Garage...............................................21
Hydrographs
Existing Phase I Garage Roof Only (2 year/24 hour) .................................................. 22
' Existing Site w/out Phase I Garage Roof (2 year/24 hour) ....................................... 25
' Existing Site; Surface Parking & Site Only (2 year/24 hour) ..................................... 28
Existing Site; Surface Parking & Site Only (10 year/24 hour) ................................... 31
Existing Site; Surface Parking & Site Only (25 year/24 hour) ................................... 34
Existing Site; Surface Parking & Site Only (100 year/24 hour) ................................. 37
Proposed Site; Surface Parking & Site Only (2 year/24 hour)...................................40
Proposed Site; Surface Parking & Site Only (10 year/24 hour).................................43
Proposed Site; Surface Parking & Site Only (25 year/24 hour).................................46
Proposed Site; Surface Parking & Site Only (100 year/24 hour)...............................49
Page 1 of 51
N.G. JACOBSON & ASSOCIATES, INC.
STORM DRAINAGE ANALYSIS & CALCULATIONS
PROJECT: Valley Medical Center
Phase H Parking Garage
Renton, Washington 98058
' CONSULTING
ENGINEERS
DATE: June 19, 1990
June 29, 1990 Revised
' GENERAL INTRODUCTION
The project site is located adjacent to the existing 41eve1 Phase I Parking Garage
near the north property line of Valley Medical Center, and west of the Chin Hills
Medical Office Building.
The Phase H design proposes to add 2 more levels to the existing parking structure
and an adjacent new 6 level parking garage. The existing on -grade parking, which is
located to the east of the new garage, will be improved.
The site presently has approximately 50 percent asphalt parking, while the
remainder is made up of mowed field grasses and landscaping. The existing grade is
approximately 10 percent sloping evenly to the west. The Phase H garage addition
has been designed to have 1.5 levels situated below grade to allow the structure to
conform to the existing topography.
1 520 PIKE STREET
SUITE 1620 For purposes of this report, we visited the site on Wednesday June 6, 1990, a day on
sE981� WA -4004 which occurred unusually high rainfall. This which permitted us to observe the
existing drainage features at near maximum capacity.
206-624-7863
206.624-8 FAX Drainage Report - VMC Phase II Garage Page 2 of 51
I
1 '
1 HYDROLOGY & HYDRAULIC CALCULATIONS
Presently the site has two (2) separate storm systems; one is a collection &
conveyance system for the existing east parking area adjacent to the existing Phase I
Parking Garage, and the other is the existing Phase I Parking Garage storm system,
which routes runoff through an existing 48 inch diameter underground detention
1 pipe & FROP-T control outlet. Both storm systems discharge at a common point.
The pre -developed and post -developed 2, 10, 25, and 100 year peak rates of runoff
were calculated for this project using the Santa Barbara Urban Hydrograph method
as outlined in the Surface Water Design Manual, January 1990; as published by the
Surface Water Management Division of the Department of Public Works, King
County, Washington. The computer input calculations and hydrograph & level -
pool -routing output data are attached to this report.
1 It was found through the hydrologic calculations that the "net" post -developed peak
' runoff rates for the entire site (both garage & site storm systems) is actually less for
the 2 and 10 year storm frequencies. This is due in part to a longer time of
concentration (Tc) for the new storm system, and diversion of some existing paved
1 area runoff by the new Phase H garage. The 25 & 100 year storm frequency "net"
developed runoff, produces approximately a 7 & 22 percent increase, respectively,
over the existing 25 & 100 year storm flows. The downstream conditions appear
very capable of handling this slight flow increase.
1 Since underground storm detention for both the existing Phase I garage and the
proposed Phase II garage was designed, approved and constructed for both the
Phase I & H storm flows, we have re -designed the outlet condition of the existing
1 FROP-T control standpipe. We are proposing to remove the existing upper orifice
and resizing the lower orifice to 2-11/16" diameter to allow the 10 year - 24 hour
developed storm to pass through without over -topping. The new larger single orifice
' will allow slightly higher discharges at lower head, without exceeding the existing 2
year - 24 hour peak runoff rate of 0.39 CFS.
1 It should be noted that the 2, 10, and 25 year design storm frequencies were not
greater than 0.5 CFS higher than their respective existing pre -developed runoff rates
1 (see attached calculations). Therefore, no on -site storm water peak rate runoff
control is required per "Core Requirement #3; Runoff Control (section 1.2.3)," of
the referenced design manual.
' 1 stormdrainage stem has been designed in
The proposed east surface parking of sto system g
' accordance with the principals set forth in chapter 4 of the referenced design
manual. See attached worksheet for pipe velocities and capacities.
r
1 Drainage Report - VMC Phase II Garage Page 3 of 51
NGJ
1
1
1
71
1
11
u
n
The following is an account of the existing drainage conditions and proposed
drainage improvements, for the on -site and downstream drainage courses.
ON -SITE DRAINAGE ANALYSIS
Existing Features:
Presently the on -site drainage consists of mostly overland runoff which is tributary to
an existing storm drainage system (see GRADING & DRAINAGE PLAN; sheet 2
of 56). The existing storm drainage system has a 30" diameter storm collector pipe
which runs along the north side of the hospital access road (which fronts the
proposed parking garage) and discharges into an existing rock reinforced, 'highly
vegetated' grassy swale near the northwest corner of the hospital property.
A separate detention system is in place beneath the west surface parking lot of the
Phase I Parking Garage. The City of Renton as -built records indicate 167 LF of 48"
diameter underground storm detention pipe, which discharges into the same swale
as the existing 30" diameter collector pipe. This detention structure was designed,
approved & constructed for storm flows from both the Phase I and Phase II Parking
garages (refer to approved Drainage Calculations for Valley Medical Hospital
Parking Garage Facility_, dated January 1988). The control manhole has two (2)
orifices (FROP-T) which permit a discharge of 0.29 CFS at maximum head (as -
built). Upon our field visit, the existing detention system appeared to be functioning
as designed.
The existing drainage swale, downstream of the storm drainage facilities, meanders
through a heavily vegetated area and discharges into Panther Creek near the
northwest corner of the hospital property line. The storm flow through the existing
grassy swale is small when compared to the existing stream flow though Panther
Creek.
Proposed Facilities.
The proposed storm drainage facilities for the Phase II Parking Garage consist of
three (3) independent collection & conveyance systems. They are as follows:
1.) Surface Parking
As shown on the Storm Drainage Plan, surface parking storm water will be
directed through a series of inlets and catch basins, and routed through a
IDrainage Report - VMC Phase H Garage Page 4 of 51
salvaged & relocated 750 gallon oil/water separator prior to being released
into the exiting 30" diameter storm collector pipe. The improved surface
parking area to the east of the new Phase H Parking Garage encompasses
approximately 4680SF of added impervious asphalt. See attached 'Hydraulic
Calculation Worksheet' for pipe sizing and storm system design.
2.) Garage Roofs:
The storm water runoff from the Phase I & II Parking Garage roofs will be
routed through a series of 6" diameter galvanized cast iron (schedule 40)
pipes within the garage, and discharged into the existing underground
detention system in the west surface parking lot adjacent to the Phase I
Parking Garage (see mechanical plans). Storm flows will then travel through
the existing FROP-T standpipe w/redesigned single orifice and a new 750
gallon oil/water separator prior to discharge into the existing grassy swale.
3.) Covered Floors:
All new covered floor drains will be collected and routed through a 2690
gallon oil/water separator prior to discharge into the sanitary sewer (see
mechanical and civil plans).
All of the storm conveyance systems have been designed to pass the storm runoff
through independent oil/water separators to enhance storm discharge water quality.
DOWNSTREAM ANALYSIS
Existing Features:
The existing storm drainage grassy swale meanders through the hospital property
through a heavily vegetated area with an abundance of underbrush. During our
field visit, the grassy swale channel was capably handling the increased hydraulic
flow due to the heavy rainfall. No appreciable erosion was visible. The swale itself,
is heavily vegetated with various grasses and aquatic plants. The existing grassy
drainage swale is well over 200 feet in length prior to its discharge into Panther
Creek.
Drainage Report - VMC Phase II Garage
Page 5 of 51
Panther Creek flows northwest to north, and flows into the Black River which is
tributary to the Duwamish River and ultimately discharges into Puget Sound.
Proposed Facilities.
None are proposed.
CONCLUSION
The downstream watercourses will be minimally impacted by the proposed
project. Runoff volume increases are alleviated by the storage/controlled release
of the existing underground storm detention facility.
Prior to construction, staked limits of the proposed clearing and grading limits be
installed, as well as erosion control measures, to ensure that downstream water
quality is maintained during construction. The use of a FROP-T outlet, oil/water
separators, and the existing grassy swale as a biofilter, have been incorporated into
the design to further ensure that appropriate runoff water quantities, and quality
will be maintained throughout the project life.
The project's storm drainage system have been designed in accordance with the
guidelines and requirements of the City of Renton.
Drainage Report - VMC Phase H Garage Page 6 of 51
I
HYDROLOGIC RUNOFF SUMMARY
I
I
I
I
I
I
I
11
Santa Barbara Urban Hydrograph Runoff Summary
Valley Medical Center - Phase H Parking Garage
.......... ... .......... .
. .. .................
.................... . . ................. ...... ..... . .......
...... ..........................
Two separate storm systems; garage with detention & site without detention.
Garage Detention System - Runoff Summary
Phase I Garage
Phase I & H Garage
......
..... . ........................
...........
............ - ..
.
.......... .
Difference
Difference
Storm
Existing
Existing
Proposed
Proposed
w /out
W/
Freq.
Qin
Qout
Qin
Qout
Detention
Detention
(year)
(CFS)
(CFS)
(CFS)
(CFS)
(CFS)
(CFS)
2
0.39
0.11
0.84
0.28
0.45
0.17
10
0.59
0.14
1.25
0.37
0.66
0.23
25
0.69
0.16
1.48
1.07
0.79
0.91
100
0.80
0.25
1.70
1.70
0.90
1.45
Entire Site w/out Garage - Runoff Summary
Existing DevelODed
Storm I Existing Existing Proposed Proposed Discharge
Freq.
Qin
Qout
Qin
Qout
Difference
(year)
(CFS)
(CFS)
(CFS)
S)
(CFS)
(CFS)
2
1.01
1.01
0.58
0.58
-0.43
10
1.65
1.65
1.02
1.02
-0.63
25
2.02
2.02
1.27
1.27
-0.75
100
2.38
2.38
1.53
1.53
-0.85
Note: Qin = Qout for "site without garage," due to no detention structure.
D:\SUMMARY.XLS
6/29/90@ 4:27 PM
Page 7 of 51
i
N.G. JACOBSON & ASSOCIATES, INC. 520PIKE STREET
SUITE 1620
CONSLitTING ENGINEERS SEATTLE, WA 98101404
206-624 863
FAX: 206-624-8947
JOB NUMBER: PROJECT:yCY_Ij i �kA< ��� BY: DATE: (D(Z
SUBJECT: ` L �. �tZi�� 1 �P�7 C �`� -� CHECKED BY: DATE:
Q:%YTI C7 wiles D SHEET NUMBER: OF: I
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:TORN SEWER HYDRAULICS - Valley Medical Center Phase It Surface Parking
'orrugated Metal 8 Polyethylene Pipe Design
HYDRAULIC CALCULATION WORKSHEET
N.G. Jacobson 8 Associates, Inc. DISK: CIVIL 1 CALC. BY: D. Swanson
Seattle, Washington 98101 DATE: 6-13-90 (revised 6-26-90) CHK-D. BY:
(206) 624-7863
AREA OF
TRIG.
BASINS
(A)
LENGTH
OF
OVER-
LAND
FLOW
TIME OF
CONCENTRATION
(minutes)
LAND I PIPE I TOTAL
RAINFALL
INT.
(25 yr.)
(1)
AVG.
RUN
OFF
COEF.
(c)
., .,..
DISCHARGE
INTO
UPPER CB
0=A•c•i
(0)
,.... ,. _....... ........
SECTION OF
STORM DRAINAGE
SYSTEM
.....
SIZE
OF
PIPE
(Dia.)
......, ........
INVERT
ELEVATION
............
SLOPE
...... ..
PIPE
MAT.
......
FULL
CAP.
(0f)
........
FULL
VEL.
(Vf)
... .._
VEL.
AT
DESIGN
0
(Vd)
,,......
RIM
ELEV.
OF
UPPER
CB
.....
COVER
OVER
PIPE AT
UPPER
CB
TYPE
(SIZE)
OF
UPPER
CB
140.
ACRES
FEET
Tl
Tp
Tc
IN./HR.
CFS
DIST
UPPER
LOWER
IN.
UPPER
LOWER
FT/FT
CFS
FPS
FPS
FT
IL 0.02 N/A N/A N/A 6.3 2.73
0.60
0.03
a
IL 3
CS 4
4
67.66
67.56
0.0125
CPP
0.15
1.76
1.41
71.10
3.11
Inlet
4 0.10 77 6.3 N/A 6.3 2.73
0.90
0.28
103
CO 4
CB 3
12
66.89
64.83
0.0200
CMP
2.73
3.48
2.19
71.50
3.61
1
IL 0.02 N/A N/A N/A 6.3 2.73
0.90
0.05
8
IL 2
CS 3
4
65.60
65.50
0.0125
CPP
0.15
1.76
1.57
68.60
2.67
Inlet
3 0.08 N/A N/A 0.78 7.1 2.53
0.90
0.51
69
CB 3
CB 2
12
64.83
64.14
0.0100
CMP
1.93
2.46
2.09
71.75
5.92
11
It 0.02 N/A N/A N/A 7.1 2.53
0.60
0.03
8
IL 1
CB 2
4
67.00
64.81
0.2738
CPP
0.72
8.24
3.96
68.80
1.47
Inlet
2 0.07 N/A N/A 0.55 7.6 2.41
0.90
0.69
65
CB 2
CB 1
12
64.14
63.49
0.0101
CMP
1.93
2.46
2.24
72.00
6.86
11
1 0.04 N/A N/A 0.48 8.1 2.32
0.50
0.74
22
CB 1
O/W Sep.
12
63.49
63.28
0.0095
CMP
1.89
2.40
2.26
72.00
7.51
11
Oil/Water Separator w/ solid lid - No Inflow N/A
N/A
0.74
25
01W Sep.
Ex. M.H.
12
63.03
58.50
0.1812
CMP
8.21
10.46
6.17
66.70
2.67
Vault
Concrete Pipe (Cone.); n - 0.012
" Assume flow
Into Inlets
- A•c•(rainfall
Corrugated Polyethylene Pipe (CPP); n - 0.018
Intensity from
the
stream catch
basin).
Corrugated Metal Pipe (CMP); n = 0.024
NOTE: All Tc, rainfall Intensity values, and design hydraulic
flows, were calculated using the methods outlined in Section
4.3 of the 'Surface Water Design Manual" (January 1990) as
published by the Surface Water Management Division of the
Department of Public Works, King County,Washington.
VMCSTRMI.KLS 6/26/90 a 3:31 PM PAGE '�A OF 'Zt
N.G. JACOBSON & ASSOCIATES, INC. 520PIKE STREET
SuiTE 1620
CONSULTING ENGINEERS SEATI-LE, WA 98101-100=1
206-624-7863
FAX: 206- i24-8947
JOB NUMBER: PROJECT: A te( ( L Gr % BY: �� DATE:
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FAX: 206-624-8947
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206-624-7863
FAX: 206-624-8947
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FAX:206-624-8947
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PROJECT: Valley Medical Center Phase II Parking 6/21/90
Existing 2 orifice - 48" dia. underground detention pipe
Stage
:::::::Storage":Data"for SBUH Hydrograph...Routing . ,:.,,,':,:::"",:.,,..:,.,.,,..."'':,...,,,"",: ,,,,.,,,,,...,. ,.. '...........
Detention Pipe (assume flat slope): 48 inches 4.00 FEET
Pipe Length: 167 feet
2 Orifice Condition (Dia./Area Lower = 1.875 inches/ 0.0192 SF
Upper = 1.500 inches/ 0.0123 SF
C = 0.62 sharp edged orifice
Control M.H. Dia. = 54 inches 4.50 Feet
Stage
Discharge
Storage C.B.
Stor.
Total
Perm.
(feet)
(cfs)
(cf) (cf)
Storage
Area
0.0
0.00
0.0
0.0
0.0
0
0.1
0.03
9.9
3.2
13.1
0
0.2
0.04
39.3
6.4
45.6
0
0.3
0.05
64.7
9.5
74.2
0
0.4
0.06
109.3
12.7
122.0
0
0.5
0.07
142.7
15.9
158.6
0
0.6
0.07
197.5
19.1
216.5
0
0.7
0.08
228.5
22.3
250.7
0
0.8
0.09
298.7
25.4
324.2
0
0.9
0.09
342.3
28.6
370.9
0
1.0
0.10
410.2
31.8
442.0
0
1.1
0.10
457.2
35.0
492.2
0
1.2
0.10
529.6
38.2
567.8
0
1.3
0.11
579.0
41.4
620.4
0
1.4
0.11
654.6
44.5
699.2
0
1.5
0.12
705.9
47.7
753.7
0
1.6
0.12
784.0
50.9
834.9
0
1.7
0.12
836.3
54.1
890.4
0
1.8
0.13
916.0
57.3
973.2
0
1.9
0.13
969.1
60.4
1029.6
0
2.0
0.13
1049.3
63.6
1112.9
0
2.1
0.14
1102.7
66.8
1169.5
0
2.2
0.14
1182.6
70.0
1252.6
0
2.3
0.14
1235.8
73.2
1309.0
0
2.4
0.15
1314.6
76.3
1391.0
0
2.5
0.15
1366.7
79.5
1446.2
0
2.6
0.15
1443.9
82.7
1526.7
0
2.7
0.16
1494.7
85.9
1580.6
0
2.8
0.16
1569.0
89.1
1658.1
0
2.9
0.25
1617.6
92.2
1709.9
0
3.0
0.25
1688.2
95.4
1783.6
0
3.1
0.26
1733.9
98.6
1832.5
0
3.2
0.26
1799.9
101.8
1901.6
0
3.3
0.27
1841.8
105.0
1946.8
0
3.4
0.27
1901.1
108.1
2009.3
0
3.5
0.27
1938.3
111.3
2049.6
0
3.6
0.28
1989.3
114.5
2103.8
0
3.7
0.28
2020.0
117.7
2137.7
0
3.8
0.29
2059.3
120.9
2180.2
0
3.9
0.29
2080.2
124.1
2204.2
0
4.0
0.29
2098.6
127.2
2225.8
0
4.1
0.30
2098.6
130.4
2229.0
0
4.2
0.30
2098.6
133.6
2232.2
0
D:\DAVE\RTDATA.XLS 6/29/90 @ 12:00 PM Page �(O of �S1
1
1
1
1
1
1
1
N.G. JACOBSON & ASSOCIATES, INC. 520 PIKE STREET 206-624-7863
Fm;
SUITE 1620 FAX: 206.624-89V
CONSULTING ENGINEERS SE.- LE, WA 981014W4
JOB NUMBER: PROJECT: �'f��{ �l ��(� LTTZ BY:� DATE:
SUBJECT: i- L, �;!'i;� r`/ CHECKED BY: DATE:
SHEET NUMBER: OF: S
Z• -2
Ski V -IBC XAD
N.G. JACOBSON & ASSOCIATES, INC. 520 PIKE STREET 206-614 7-863
SUITE 1620 FAX: 206-624-8947
CONSULTING ENGINEERS SEATILE, WA 98101-1001
JOBNUMBER: PROJECT: ,-Y lktf��,�}�(� � ^r�ir� BY: U>F, DATE:; -
SUBJECT: CHECKED BY: DATE: Z�2 y
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(.mac.. � - t�:AIAulek�IS\
-- . .- •'. � - Z.C�C� L+ _> USA a � Z _ ���i� � G���
' PROJECT: Valley Medical Center Phase II Parking 6/27/90
Proposed single 2-11/16" orifice - existing detention pipe
Stage - Storage Data for SBUH Hydrograph Routing
Detention Pipe (assume flat slope):
48
inches
4.00
FEET
Pipe Length:
167
feet
2 Orifice Condition (Dia./Area Lower =
2.688
inches/
0.0394
SF
Upper =
0.000
inches/
0.0000
SF
C =
0.62
sharp edged orifice
Control M.H. Dia. =
54
inches
4.50
Feet
FROP-T Overflow Standpipe Dia. =
12
inches
Overflow Elevation =
4.1feet
Stage
Discharge
Storage
C.B. Stor.
Total
Perm.
(feet)
(cfs)
(cf)
(cf)
Storage
Area
0.0
0.00
0.0
0.0
0.0
0
0.1
0.06
9.9
3.2
13.1
0
0.2
0.09
39.3
6.4
45.6
0
0.3
0.11
64.7
9.5
74.2
0
0.4
0.12
109.3
12.7
122.0
0
0.5
0.14
142.7
15.9
158.6
0
0.6
0.15
197.5
19.1
216.5
0
0.7
0.16
228.5
22.3
250.7
0
0.8
0.18
298.7
25.4
324.2
0
0.9
0.19
342.3
28.6
370.9
0
1.0
0.20
410.2
31.8
442.0
0
1.1
0.21
457.2
35.0
492.2
0
1.2
0.21
529.6
38.2
567.8
0
1.3
0.22
579.0
41.4
620.4
0
1.4
0.23
654.6
44.5
699.2
0
1.5
0.24
705.9
47.7
753.7
0
1.6
0.25
784.0
50.9
834.9
0
1.7
0.26
836.3
54.1
890.4
0
1.8
0.26
916.0
57.3
973.2
0
1.9
0.27
969.1
60.4
1029.6
0
2.0
0.28
1049.3
63.6
1112.9
0
2.1
0.28
1102.7
66.8
1169.5
0
2.2
0.29
1182.6
70.0
1252.6
0
2.3
0.30
1235.8
73.2
1309.0
0
2.4
0.30
1314.6
76.3
1391.0
0
2.5
0.31
1366.7
79.5
1446.2
0
2.6
0.32
1443.9
82.7
1526.7
0
2.7
0.32
1494.7
85.9
1580.6
0
2.8
0.33
1569.0
89.1
1658.1
0
2.9
0.33
1617.6
92.2
1709.9
0
3.0
0.34
1688.2
95.4
1783.6
0
3.1
0.35
1733.9
98.6
1832.5
0
3.2
0.35
1799.9
101.8
1901.6
0
3.3
0.36
1841.8
105.0
1946.8
0
3.4
0.36
1901.1
108.1
2009.3
0
3.5
0.37
1938.3
111.3
2049.6
0
3.6
0.37
1989.3
114.5
2103.8
0
3.7
0.38
2020.0
117.7
2137.7
0
3.8
0.38
2059.3
120.9
2180.2
0
3.9
0.39
2080.2
124.1
2204.2
0
4.0
0.39
2098.6
127.2
2225.8
0
4.1
0.40
2098.6
130.4
2229.0
0
4.2
1.60
2098.6
133.6
2232.2
0 Overflow
4.3
2.10
2098.6
136.8
2235.4
0
4.4
2.48
2098.6
140.0
2238.5
0
4.5
2.81
2098.6
143.1
2241.7
0
4.6
3.09
2098.6
146.3
2244.9
0
4.7
3.35
2098.6
149.5
2248.1
0
4.8
3.59
2098.6
152.7
2251.3
0
4.9
3.82
2098.6
155.9
2254.5
0
5.0
4.03
2098.6
159.0
2257.6
0
I
D:\DAVE\RTDATNEN.XLS 6/28/90 a 1:40 PM Page M of S 1
1
1
romN.G. JACOBSON & ASSOCIATES, INC. 520 PIKE STREET
I SUITE 1620
CONSULTING FeNGINEERS SEATTLE, WA 981014004
206-624-7863
FAX:206-624-8947
JOB NUMBER: PROJECT: � � I (( i4/! L ;'kL ��� . BY: DP_ j DATE:Z=-ia.
SUBJECT: zc l�l ���d �.� ��� CHECKED BY: DATE:
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206-624-7863
SUITE 1620
FAX: 20"24.8947
CONSULTING ENGINEERS SEATTLE, WA 98101-�1
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PROJECT: BY:�
S DATE:
SUBJECT: J'. r"J��!��{•L-�-�^_� CHECKED BY:
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3 Year
Storm -
Existing Site
Conditions (Phase z Garage Roof
Santa Barbara Urban
npuroe,aph
moua>/
Hydrologic model of
drainage features
6/26/90
pnoJscr
Valley MedicaL Center ph11
Parking
Garage u Improvements
AREA =
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Pt ~
z'o
inches (Total rainfall
for z year ' 24 hour event)
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ut ~
10m/n'
rc ~
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existing
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AREA ~
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CFS
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0.0080
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o'ouoa
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0.0640
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0'0013
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0'0720
o'oouo
n'ouoO
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0'0018
0'0018
0'01
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100
0'0040
0'0080
n'mmo
o'0000
0'0000
0'0063
o'ooZZ
0'0022
0'01
0'01
110
o'nosn
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o'ovmo
o'onoo
o'noon
o'uooa
0'0032
o'ouoz
0'01
0'01
120
o'noso
0'0100
n'moo
o'0000
o'ooun
0'0133
0'0038
o'uosa
o'oZ
o'oz
130
0.0050
0'0100
0,1100
V'Vono
0.0000
0'0175
0'0042
0.0042
0'02
0.02
140
0'0050
0'0100
0'1200
o'0000
0.0000
0'0221
0'0046
0'0046
n'oz
0.02
150
0'0050
0'0100
0'1300
0'0000
0.0000
0'0271
0'0050
0'0050
O'oZ
0'02
160
0'0050
0.0100
o'woo
0.0000
V'oVVo
0'0324
0'0053
0.0053
0'02
o'uZ
170
0'0060
0'0120
0.1520
0.0000
o'000u
0.0392
0'0068
u'oous
o'ns
0'03
180
V'onan
0'0120
0.1640
o'0000
0.0000
0'0464
0'0072
o'oora
o'oJ
o'us
1*0
0'0060
0'0120
0'1760
V'uoon
n'onou
o'000v
o'ours
0'0075
u'no
o'o]
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0'0060
0'0120
0'1880
u'0000
u'ooVo
0'0617
0'0078
o'ooru
0'03
o'oo
210
u'ooao
0'0120
u'zuuo
o'0000
o'nnoo
o'uapu
0'0081
0'0081
n'oo
o'oo
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0'0060
0'0120
0'2120
o'VuVo
V'n000
0'0781
0'0083
0'0083
o'oo
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0'0140
o'uzau
o'onoo
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0'0881
0'0100
0.0100
0'04
0.04
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0'0140
0'2400
o'ouOs
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0'0984
0'0103
0'0103
0'04
0'04
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0'0070
0'0140
0'2540
0'0009
o'000a
0'1089
o'ums
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0'04
0'04
260
0'0070
0'0140
0'2680
0'0018
0'0009
0'1197
0'0108
0'0108
0'04
0'04
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0'0070
0'0140
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0'0031
0'0012
0'1306
0'0110
0'0110
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0'0140
o'anao
0'0046
0'0015
0'1418
0'0111
0'0111
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0'05
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0.0082
0.0164
0.3124
0.0068
0.0022
0'1551
0'0133
0'0133
0'06
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0.0164
0.3288
o'unoo
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0.1685
0'0135
0'0135
0.06
0.06
310
0'0082
0'0164
0'3452
0.0123
o'oozv
0.1822
0.0137
0'0137
0'06
0.06
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0'0164
0'3616
0'0155
0'0033
0.1961
0'0138
0'0138
0.06
0.06
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0'0082
0.01*4
0.3780
0'019e
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0'2101
0'0140
0'0140
0'06
0'06
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0.0164
0.3944
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0'3242
0'0141
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o:\oAvs\sronw\zpxspm'xLs 6/26/90 m s:so pm Page ZZ- Of <-; I
N.G. Jacobson Associates, Inc.
11
1
350
0.0095
0.0190
0.4134
0.0281
0.0050
0.2407
0.0165
0.0165
0.07
0.07
360
0.0095
0.0190
0.4324
0.0334
0.0054
0.2574
0.0167
0.0167
0.07
0.07
370
0.0095
0.0190
0.4514
0.0392
0.0058
0.2743
0.0168
0.0168
0.07
0.07
380
0.0095
0.0190
0.4704
0.0453
0.0061
0.2912
0.0170
0.0170
0.07
0.07
390
0.0095
0.0190
0.4894
0.0518
0.0065
0.3083
0.0171
0.0171
0.07
0.07
400
0.0095
0.0190
0.5084
0.0586
0.0068
0.3255
0.0172
0.0172
0.07
0.07
410
0.0133
0.0266
0.5350
0.0687
0.0101
0.3497
0.0242
0.0242
0.10
0.09
420
0.0133
0.0266
0.5616
0.0794
0.0107
0.3742
0.0244
0.0244
0.10
0.11
430
0.0133
0.0266
0.5882
0.0907
0.0113
0.3987
0.0246
0.0246
0.10
0.10
440
0.0180
0.0360
0.6242
0.1068
0.0161
0.4322
0.0335
0.0335
0.14
0.13
450
0.0180
0.0360
0.6602
0.1238
0.0170
0.4659
0.0337
0.0337
0.14
0.14
460
0.0340
0.0680
0.7282
0.1583
0.0345
0.5300
0.0641
0.0641
0.27
0.23
470
0.0540
0.1080
0.8362
0.2185
0.0602
0.6330
0.1030
0.1030
0.43
0.39
480
0.0270
0.0540
0.8902
0.2508
0.0323
0.6848
0.0519
0.0519
0.22
0.30
490
0.0180
0.0360
0.9262
0.2730
0.0222
0.7195
0.0347
0.0347
0.14
0.14
500
0.0134
0.0268
0.9530
0.2899
0.0169
0.7454
0.0259
0.0259
0.11
0.12
510
0.0134
0.0268
0.9798
0.3071
0.0172
0.7713
0.0259
0.0259
0.11
0.10
520
0.0134
0.0268
1.0066
0.3246
0.0175
0.7973
0.0260
0.0260
0.11
0.11
530
0.0088
0.0176
1.0242
0.3362
0.0116
0.8144
0.0171
0.0171
0.07
0.08
540
0.0088
0.0176
1.0418
0.3479
0.0117
0.8315
0.0171
0.0171
0.07
0.07
550
0.0088
0.0176
1.0594
0.3597
0.0118
0.8486
0.0171
0.0171
0.07
0.07
560
0.0088
0.0176
1.0770
0.3717
0.0119
0.8657
0.0171
0.0171
0.07
0.07
570
0.0088
0.0176
1.0946
0.3837
0.0120
0.8828
0.0171
0.0171
0.07
0.07
580
0.0088
0.0176
1.1122
0.3958
0.0121
0.9000
0.0171
0.0171
0.07
0.07
590
0.0088
0.0176
1.1298
0.4080
0.0122
0.9171
0.0172
0.0172
0.07
0.07
600
0.0088
0.0176
1.1474
0.4203
0.0123
0.9343
0.0172
0.0172
0.07
0.07
610
0.0088
0.0176
1.1650
0.4328
0.0124
0.9515
0.0172
0.0172
0.07
0.07
620
0.0088
0.0176
1.1826
0.4452
0.0125
0.9686
0.0172
0.0172
0.07
0.07
630
0.0088
0.0176
1.2002
0.4578
0.0126
0.9858
0.0172
0.0172
0.07
0.07
640
0.0088
0.0176
1.2178
0.4705
0.0127
1.0031
0.0172
0.0172
0.07
0.07
650
0.0072
0.0144
1.2322
0.4809
0.0104
1.0171
0.0141
0.0141
0.06
0.06
660
0.0072
0.0144
1.2466
0.4914
0.0105
1.0312
0.0141
0.0141
0.06
0.06
670
0.0072
0.0144
1.2610
0.5019
0.0105
1.0453
0.0141
0.0141
0.06
0.06
680
0.0072
0.0144
1.2754
0.5125
0.0106
1.0595
0.0141
0.0141
0.06
0.06
690
0.0072
0.0144
1.2898
0.5231
0.0106
1.0736
0.0141
0.0141
0.06
0.06
700
0.0072
0.0144
1.3042
0.5338
0.0107
1.0877
0.0141
0.0141
0.06
0.06
710
0.0072
0.0144
1.3186
0.5445
0.0107
1.1018
0.0141
0.0141
0.06
0.06
720
0.0072
0.0144
1.3330
0.5553
0.0108
1.1159
0.0141
0.0141
0.06
0.06
730
0.0072
0.0144
1.3474
0.5661
0.0108
1.1301
0.0141
0.0141
0.06
0.06
740
0.0072
0.01"
1.3618
0.5770
0.0109
1.1442
0.0141
0.0141
0.06
0.06
750
0.0072
0.0144
1.3762
0.5879
0.0109
1.1584
0.0141
0.0141
0.06
0.06
760
0.0072
0.0144
1.3906
0.5989
0.0110
1.1725
0.0141
0.0141
0.06
0.06
770
0.0057
0.0114
1.4020
0.6076
0.0087
1.1837
0.0112
0.0112
0.05
0.05
780
0.0057
0.0114
1.4134
0.6163
0.0087
1.1949
0.0112
0.0112
0.05
0.05
790
0.0057
0.0114
1.4248
0.6251
0.0088
1.2061
0.0112
0.0112
0.05
0.05
800
0.0057
0.0114
1.4362
0.6338
0.0088
1.2173
0.0112
0.0112
0.05
0.05
810
0.0057
0.0114
1.4476
0.6427
0.0088
1.2286
0.0112
0.0112
0.05
0.05
820
0.0057
0.0114
1.4590
0.6515
0.0088
1.2398
0.0112
0.0112
0.05
0.05
830
0.0057
0.0114
1.4704
0.6603
0.0089
1.2510
0.0112
0.0112
0.05
0.05
840
0.0057
0.0114
1.4818
0.6692
0.0089
1.2622
0.0112
0.0112
0.05
0.05
850
0.0057
0.0114
1.4932
0.6781
0.0089
1.2734
0.0112
0.0112
0.05
0.05
860
0.0057
0.0114
1.5046
0.6871
0.0089
1.2847
0.0112
0.0112
0.05
0.05
870
0.0057
0.0114
1.5160
0.6960
0.0090
1.2959
0.0112
0.0112
0.05
0.05
880
0.0057
0.0114
1.5274
0.7050
0.0090
1.3071
0.0112
0.0112
0.05
0.05
890
0.0050
0.0100
1.5374
0.7129
0.0079
1.3170
0.0099
0.0099
0.04
0.04
900
0.0050
0.0100
1.5474
0.7208
0.0079
1.3268
0.0099
0.0099
0.04
0.04
910
0.0050
0.0100
1.5574
0.7287
0.0079
1.3367
0.0099
0.0099
0.04
0.04
920
0.0050
0.0100
1.5674
0.7367
0.0079
1.3466
0.0099
0.0099
0.04
0.04
930
0.0050
0.0100
1.5774
0.7446
0.0080
1.3564
0.0099
0.0099
0.04
0.04
940
0.0050
0.0100
1.5874
0.7526
0.0080
1.3663
0.0099
0.0099
0.04
0.04
950
0.0050
0.0100
1.5974
0.7606
0.0080
1.3762
0.0099
0.0099
0.04
0.04
960
0.0050
0.0100
1.6074
0.7686
0.0080
1.3860
0.0099
0.0099
0.04
0.04
970
0.0050
0.0100
1.6174
0.7767
0.0080
1.3959
0.0099
0.0099
0.04
0.04
980
0.0050
0.0100
1.6274
0.7847
0.0080
1.4058
0.0099
0.0099
0.04
0.04
D:\DAVE\STORM\2PREPHI.XLS
6/26/90 a 3:38 PM
Page Z-�' of '� 1
N.G. Jacobson Associates, Inc.
990
0.0050
0.0100
1.6374
0.7928
0.0081
1.4156
0.0099
0.0099
0.04
0.04
1000
0.0050
0.0100
1.6474
0.8008
0.0081
1.4255
0.0099
0.0099
0.04
0.04
1010
0.0040
0.0080
1.6554
0.8073
0.0065
1.4334
0.0079
0.0079
0.03
0.04
1020
0.0040
0.0080
1.6634
0.8138
0.0065
1.4413
0.0079
0.0079
0.03
0.03
1030
0.0040
0.0080
1.6714
0.8203
0.0065
1.4492
0.0079
0.0079
0.03
0.03
1040
0.0040
0.0080
1.6794
0.8268
0.0065
1.4571
0.0079
0.0079
0.03
0.03
1050
0.0040
0.0080
1.6874
0.8333
0.0065
1.4650
0.0079
0.0079
0.03
0.03
1060
0.0040
0.0080
1.6954
0.8398
0.0065
1.4729
0.0079
0.0079
0.03
0.03
1070
0.0040
0.0080
1.7034
0.8463
0.0065
1.4808
0.0079
0.0079
0.03
0.03
1080
0.0040
0.0080
1.7114
0.8528
0.0065
1.4887
0.0079
0.0079
0.03
0.03
1090
0.0040
0.0080
1.7194
0.8594
0.0065
1.4966
0.0079
0.0079
0.03
0.03
1100
0.0040
0.0080
1.7274
0.8659
0.0066
1.5045
0.0079
0.0079
0.03
0.03
1110
0.0040
0.0080
1.7354
0.8725
0.0066
1.5124
0.0079
0.0079
0.03
0.03
1120
0.0040
0.0080
1.7434
0.8791
0.0066
1.5203
0.0079
0.0079
0.03
0.03
1130
0.0040
0.0080
1.7514
0.8857
0.0066
1.5283
0.0079
0.0079
0.03
0.03
1140
0.0040
0.0080
1.7594
0.8922
0.0066
1.5362
0.0079
0.0079
0.03
0.03
1150
0.0040
0.0080
1.7674
0.8988
0.0066
1.5441
0.0079
0.0079
0.03
0.03
1160
0.0040
0.0080
1.7754
0.9054
0.0066
1.5520
0.0079
0.0079
0.03
0.03
1170
0.0040
0.0080
1.7834
0.9121
0.0066
1.5599
0.0079
0.0079
0.03
0.03
1180
0.0040
0.0080
1.7914
0.9187
0.0066
1.5678
0.0079
0.0079
0.03
0.03
1190
0.0040
0.0080
1.7994
0.9253
0.0066
1.5757
0.0079
0.0079
0.03
0.03
1200
0.0040
0.0080
1.8074
0.9319
0.0066
1.5836
0.0079
0.0079
0.03
0.03
1210
0.0040
0.0080
1.8154
0.9386
0.0066
1.5916
0.0079
0.0079
0.03
0.03
1220
0.0040
0.0080
1.8234
0.9452
0.0067
1.5995
0.0079
0.0079
0.03
0.03
1230
0.0040
0.0080
1.8314
0.9519
0.0067
1.6074
0.0079
0.0079
0.03
0.03
1240
0.0040
0.0080
1.8394
0.9586
0.0067
1.6153
0.0079
0.0079
0.03
0.03
1250
0.0040
0.0080
1.8474
0.9652
0.0067
1.6232
0.0079
0.0079
0.03
0.03
1260
0.0040
0.0080
1.8554
0.9719
0.0067
1.6311
0.0079
0.0079
0.03
0.03
1270
0.0040
0.0080
1.8634
0.9786
0.0067
1.6391
0.0079
0.0079
0.03
0.03
1280
0.0040
0.0080
1.8714
0.9853
0.0067
1.6470
0.0079
0.0079
0.03
0.03
1290
0.0040
0.0080
1.8794
0.9920
0.0067
1.6549
0.0079
0.0079
0.03
0.03
1300
0.0040
0.0080
1.8874
0.9987
0.0067
1.6628
0.0079
0.0079
0.03
0.03
1310
0.0040
0.0080
1.8954
1.0055
0.0067
1.6707
0.0079
0.0079
0.03
0.03
1320
0.0040
0.0080
1.9034
1.0122
0.0067
1.6787
0.0079
0.0079
0.03
0.03
1330
0.0040
0.0080
1.9114
1.0189
0.0067
1.6866
0.0079
0.0079
0.03
0.03
1340
0.0040
0.0080
1.9194
1.0257
0.0067
1.6945
0.0079
0.0079
0.03
0.03
1350
0.0040
0.0080
1.9274
1.0324
0.0068
1.7024
0.0079
0.0079
0.03
0.03
1360
0.0040
0.0080
1.9354
1.0392
0.0068
1.7103
0.0079
0.0079
0.03
0.03
1370
0.0040
0.0080
1.9434
1.0460
0.0068
1.7183
0.0079
0.0079
0.03
0.03
1380
0.0040
0.0080
1.9514
1.0527
0.0068
1.7262
0.0079
0.0079
0.03
0.03
1390
0.0040
0.0080
1.9594
1.0595
0.0068
1.7341
0.0079
0.0079
0.03
0.03
1400
0.0040
0.0080
1.9674
1.0663
0.0068
1.7420
0.0079
0.0079
0.03
0.03
1410
0.0040
0.0080
1.9754
1.0731
0.0068
1.7500
0.0079
0.0079
0.03
0.03
1420
0.0040
0.0080
1.9834
1.0799
0.0068
1.7579
0.0079
0.0079
0.03
0.03
1430
0.0040
0.0080
1.9914
1.0867
0.0068
1.7658
0.0079
0.0079
0.03
0.03
1440
0.0040
0.0080
1.9994
1.0935
0.0068
1.7738
0.0079
0.0079
0.03
0.03
D:\DAVE\STORM\2PREPHI.XLS 6/26/90 @ 3:38 PM Page ZA of '5 1
N.G. Jacobson Associates, Inc.
2 Yr. Storm - Existing Site Conditions (Entire Site Except Ph. I Garage Roof)
Santa Barbara Urban Hydrograph (SBUH); Hydrologic model of drainage features 6/27/90
PROJECT: Valley Medical Center Phase II Parking Garage & Improvements
AREA = 2.48 Acres
Pt = 2.0 inches (Total rainfall for 2 year - 24 hour event)
dt = 10 min.
Tc = 3.41 min. (Existing site sheet flow => existing storm system => existing discharge outlet)
w = 0.5945 (Routing Constant, w = dt/(2Tc + dt))
PERVIOUS Parcel: IMPERVIOUS Parcel:
AREA = 1.45 Acres AREA = 1.03 Acres
CN = 90 CN = 98
S = 1.11 S = 0.20
0.2s = 0.22 0.2S = 0.04 Peak Discharge = 1.01 CFS
Rainfall Incre- Accumu- Accumu- Incre- Accumu- Incre- Instant Design
Time Distri- mental lated lated mental lated mental Total Hydro- Hydro-
bution Rainfall Rainfall Runoff Runoff Runoff Runoff Runoff graph graph
(min.) (% of Pt) (in.) (in.) (in.) (in.) (in.) (in.) (in.) (CFS) (CFS)
10
0.0040
0.0080
0.0080
0.0000
0.0000
0.0000
0.0000
0.0000
0.00
0.00
20
0.0040
0.0080
0.0160
0.0000
0.0000
0.0000
0.0000
0.0000
0.00
0.00
30
0.0040
0.0080
0.0240
0.0000
0.0000
0.0000
0.0000
0.0000
0.00
0.00
40
0.0040
0.0080
0.0320
0.0000
0.0000
0.0000
0.0000
0.0000
0.00
0.00
50
0.0040
0.0080
0.0400
0.0000
0.0000
0.0000
0.0000
0.0000
0.00
0.00
60
0.0040
0.0080
0.0480
0.0000
0.0000
0.0002
0.0002
0.0001
0.00
0.00
70
0.0040
0.0080
0.0560
0.0000
0.0000
0.0011
0.0008
0.0003
0.01
0.00
80
0.0040
0.0080
0.0640
0.0000
0.0000
0.0024
0.0013
0.0005
0.01
0.01
90
0.0040
0.0080
0.0720
0.0000
0.0000
0.0041
0.0018
0.0007
0.01
0.01
100
0.0040
0.0080
0.0800
0.0000
0.0000
0.0063
0.0022
0.0009
0.01
0.01
110
0.0050
0.0100
0.0900
0.0000
0.0000
0.0096
0.0032
0.0013
0.02
0.02
120
0.0050
0.0100
0.1000
0.0000
0.0000
0.0133
0.0038
0.0016
0.02
0.02
130
0.0050
0.0100
0.1100
0.0000
0.0000
0.0175
0.0042
0.0017
0.03
0.03
140
0.0050
0.0100
0.1200
0.0000
0.0000
0.0221
0.0046
0.0019
0.03
0.03
150
0.0050
0.0100
0.1300
0.0000
0.0000
0.0271
0.0050
0.0021
0.03
0.03
160
0.0050
0.0100
0.1400
0.0000
0.0000
0.0324
0.0053
0.0022
0.03
0.03
170
0.0060
0.0120
0.1520
0.0000
0.0000
0.0392
0.0068
0.0028
0.04
0.04
180
0.0060
0.0120
0.1640
0.0000
0.0000
0.0464
0.0072
0.0030
0.04
0.04
190
0.0060
0.0120
0.1760
0.0000
0.0000
0.0539
0.0075
0.0031
0.05
0.05
200
0.0060
0.0120
0.1880
0.0000
0.0000
0.0617
0.0078
0.0032
0.05
0.05
210
0.0060
0.0120
0.2000
0.0000
0.0000
0.0698
0.0081
0.0034
0.05
0.05
220
0.0060
0.0120
0.2120
0.0000
0.0000
0.0781
0.0083
0.0035
0.05
0.05
230
0.0070
0.0140
0.2260
0.0000
0.0000
0.0881
0.0100
0.0042
0.06
0.06
240
0.0070
0.0140
0.2400
0.0003
0.0003
0.0984
0.0103
0.0044
0.07
0.07
250
0.0070
0.0140
0.2540
0.0009
0.0006
0.1089
0.0105
0.0047
0.07
0.07
260
0.0070
0.0140
0.2680
0.0018
0.0009
0.1197
0.0108
0.0050
0.08
0.07
270
0.0070
0.0140
0.2820
0.0031
0.0012
0.1306
0.0110
0.0053
0.08
0.08
280
0.0070
0.0140
0.2960
0.0046
0.0015
0.1418
0.0111
0.0055
0.08
0.08
290
0.0082
0.0164
0.3124
0.0068
0.0022
0.1551
0.0133
0.0068
0.10
0.09
300
0.0082
0.0164
0.3288
0.0093
0.0026
0.1685
0.0135
0.0071
0.11
0.11
310
0.0082
0.0164
0.3452
0.0123
0.0029
0.1822
0.0137
0.0074
0.11
0.11
320
0.0082
0.0164
0.3616
0.0155
0.0033
0.1961
0.0138
0.0077
0.12
0.11
330
0.0082
0.0164
0.3780
0.0192
0.0036
0.2101
0.0140
0.0079
0.12
0.12
340
0.0082
0.0164
0.3944
0.0231
0.0039
0.2242
0.0141
0.0082
0.12
0.12
D:\DAVE\STORM\2PREPHIS.XLS 6/27/90 a 10:47 AM Page 2-S of �1- l
N.G. Jacobson Associates, Inc.
350
0.0095
0.0190
0.4134
0.0281
0.0050
0.2407
0.0165
0.0098
0.15
0.14
360
0.0095
0.0190
0.4324
0.0334
0.0054
0.2574
0.0167
0.0101
0.15
0.15
370
0.0095
0.0190
0.4514
0.0392
0.0058
0.2743
0.0168
0.0104
0.16
0.15
380
0.0095
0.0190
0.4704
0.0453
0.0061
0.2912
0.0170
0.0106
0.16
0.16
390
0.0095
0.0190
0.4894
0.0518
0.0065
0.3083
0.0171
0.0109
0.16
0.16
400
0.0095
0.0190
0.5084
0.0586
0.0068
0.3255
0.0172
0.0111
0.17
0.17
410
0.0133
0.0266
0.5350
0.0687
0.0101
0.3497
0.0242
0.0160
0.24
0.21
420
0.0133
0.0266
0.5616
0.0794
0.0107
0.3742
0.0244
0.0164
0.25
0.25
430
0.0133
0.0266
0.5882
0.0907
0.0113
0.3987
0.0246
0.0168
0.25
0.25
440
0.0180
0.0360
0.6242
0.1068
0.0161
0.4322
0.0335
0.0233
0.35
0.31
450
0.0180
0.0360
0.6602
0.1238
0.0170
0.4659
0.0337
0.0240
0.36
0.36
460
0.0340
0.0680
0.7282
0.1583
0.0345
0.5300
0.0641
0.0468
0.70
0.56
470
0.0540
0.1080
0.8362
0.2185
0.0602
0.6330
0.1030
0.0780
1.17
1.01
480
0.0270
0.0540
0.8902
0.2508
0.0323
0.6848
0.0519
0.0404
0.61
0.87
490
0.0180
0.0360
0.9262
0.2730
0.0222
0.7195
0.0347
0.0274
0.41
0.44
500
0.0134
0.0268
0.9530
0.2899
0.0169
0.7454
0.0259
0.0206
0.31
0.35
510
0.0134
0.0268
0.9798
0.3071
0.0172
0.7713
0.0259
0.0208
0.31
0.30
520
0.0134
0.0268
1.0066
0.3246
0.0175
0.7973
0.0260
0.0210
0.31
0.32
530
0.0088
0.0176
1.0242
0.3362
0.0116
0.8144
0.0171
0.0139
0.21
0.25
540
0.0088
0.0176
1.0418
0.3479
0.0117
0.8315
0.0171
0.0139
0.21
0.20
550
0.0088
0.0176
1.0594
0.3597
0.0118
0.8486
0.0171
0.0140
0.21
0.21
560
0.0088
0.0176
1.0770
0.3717
0.0119
0.8657
0.0171
0.0141
0.21
0.21
570
0.0088
0.0176
1.0946
0.3837
0.0120
0.8828
0.0171
0.0141
0.21
0.21
580
0.0088
0.0176
1.1122
0.3958
0.0121
0.9000
0.0171
0.0142
0.21
0.21
590
0.0088
0.0176
1.1298
0.4080
0.0122
0.9171
0.0172
0.0143
0.21
0.21
600
0.0088
0.0176
1.1474
0.4203
0.0123
0.9343
0.0172
0.0143
0.22
0.21
610
0.0088
0.0176
1.1650
0.4328
0.0124
0.9515
0.0172
0.0144
0.22
0.22
620
0.0088
0.0176
1.1826
0.4452
0.0125
0.9686
0.0172
0.0144
0.22
0.22
630
0.0088
0.0176
1.2002
0.4578
0.0126
0.9858
0.0172
0.0145
0.22
0.22
640
0.0088
0.0176
1.2178
0.4705
0.0127
1.0031
0.0172
0.0146
0.22
0.22
650
0.0072
0.0144
1.2322
0.4809
0.0104
1.0171
0.0141
0.0119
0.18
0.20
660
0.0072
0.0144
1.2466
0.4914
0.0105
1.0312
0.0141
0.0120
0.18
0.18
670
0.0072
0.0144
1.2610
0.5019
0.0105
1.0453
0.0141
0.0120
0.18
0.18
680
0.0072
0.0144
1.2754
0.5125
0.0106
1.0595
0.0141
0.0120
0.18
0.18
690
0.0072
0.0144
1.2898
0.5231
0.0106
1.0736
0.0141
0.0121
0.18
0.18
700
0.0072
0.0144
1.3042
0.5338
0.0107
1.0877
0.0141
0.0121
0.18
0.18
710
0.0072
0.0144
1.3186
0.5445
0.0107
1.1018
0.0141
0.0121
0.18
0.18
720
0.0072
0.0144
1.3330
0.5553
0.0108
1.1159
0.0141
0.0122
0.18
0.18
730
0.0072
0.0144
1.3474
0.5661
0.0108
1.1301
0.0141
0.0122
0.18
0.18
740
0.0072
0.0144
1.3618
0.5770
0.0109
1.1442
0.0141
0.0122
0.18
0.18
750
0.0072
0.0144
1.3762
0.5879
0.0109
1.1584
0.0141
0.0123
0.18
0.18
760
0.0072
0.0144
1.3906
0.5989
0.0110
1.1725
0.0141
0.0123
0.18
0.18
770
0.0057
0.0114
1.4020
0.6076
0.0087
1.1837
0.0112
0.0097
0.15
0.16
780
0.0057
0.0114
1.4134
0.6163
0.0087
1.1949
0.0112
0.0098
0.15
0.14
790
0.0057
0.0114
1.4248
0.6251
0.0088
1.2061
0.0112
0.0098
0.15
0.15
800
0.0057
0.0114
1.4362
0.6338
0.0088
1.2173
0.0112
0.0098
0.15
0.15
810
0.0057
0.0114
1.4476
0.6427
0.0088
1.2286
0.0112
0.0098
0.15
0.15
820
0.0057
0.0114
1.4590
0.6515
0.0088
1.2398
0.0112
0.0098
0.15
0.15
830
0.0057
0.0114
1.4704
0.6603
0.0089
1.2510
0.0112
0.0098
0.15
0.15
840
0.0057
0.0114
1.4818
0.6692
0.0089
1.2622
0.0112
0.0099
0.15
0.15
850
0.0057
0.0114
1.4932
0.6781
0.0089
1.2734
0.0112
0.0099
0.15
0.15
860
0.0057
0.0114
1.5046
0.6871
0.0089
1.2847
0.0112
0.0099
0.15
0.15
870
0.0057
0.0114
1.5160
0.6960
0.0090
1.2959
0.0112
0.0099
0.15
0.15
880
0.0057
0.0114
1.5274
0.7050
0.0090
1.3071
0.0112
0.0099
0.15
0.15
890
0.0050
0.0100
1.5374
0.7129
0.0079
1.3170
0.0099
0.0087
0.13
0.14
900
0.0050
0.0100
1.5474
0.7208
0.0079
1.3268
0.0099
0.0087
0.13
0.13
910
0.0050
0.0100
1.5574
0.7287
0.0079
1.3367
0.0099
0.0087
0.13
0.13
920
0.0050
0.0100
1.5674
0.7367
0.0079
1.3466
0.0099
0.0087
0.13
0.13
930
0.0050
0.0100
1.5774
0.7446
0.0080
1.3564
0.0099
0.0088
0.13
0.13
940
0.0050
0.0100
1.5874
0.7526
0.0080
1.3663
0.0099
0.0088
0.13
0.13
950
0.0050
0.0100
1.5974
0.7606
0.0080
1.3762
0.0099
0.0088
0.13
0.13
960
0.0050
0.0100
1.6074
0.7686
0.0080
1.3860
0.0099
0.0088
0.13
0.13
970
0.0050
0.0100
1.6174
0.7767
0.0080
1.3959
0.0099
0.0088
0.13
0.13
980
0.0050
0.0100
1.6274
0.7847
0.0080
1.4058
0.0099
0.0088
0.13
0.13
D:\DAVE\STORM\2PREPHIS.XLS
6/27/90 a 10:47
AM
Page
V-'I7 of S
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990
0.0050
0.0100
1.6374
0.7928
0.0081
1.4156
0.0099
0.0088
0.13
0.13
1000
0.0050
0.0100
1.6474
0.8008
0.0081
1.4255
0.0099
0.0088
0.13
0.13
1010
0.0040
0.0080
1.6554
0.8073
0.0065
1.4334
0.0079
0.0071
0.11
0.12
1020
0.0040
0.0080
1.6634
0.8138
0.0065
1.4413
0.0079
0.0071
0.11
0.10
1030
0.0040
0.0080
1.6714
0.8203
0.0065
1.4492
0.0079
0.0071
0.11
0.11
1040
0.0040
0.0080
1.6794
0.8268
0.0065
1.4571
0.0079
0.0071
0.11
0.11
1050
0.0040
0.0080
1.6874
0.8333
0.0065
1.4650
0.0079
0.0071
0.11
0.11
1060
0.0040
0.0080
1.6954
0.8398
0.0065
1.4729
0.0079
0.0071
0.11
0.11
1070
0.0040
0.0080
1.7034
0.8463
0.0065
1.4808
0.0079
0.0071
0.11
0.11
1080
0.0040
0.0080
1.7114
0.8528
0.0065
1.4887
0.0079
0.0071
0.11
0.11
1090
0.0040
0.0080
1.7194
0.8594
0.0065
1.4966
0.0079
0.0071
0.11
0.11
1100
0.0040
0.0080
1.7274
0.8659
0.0066
1.5045
0.0079
0.0071
0.11
0.11
1110
0.0040
0.0080
1.7354
0.8725
0.0066
1.5124
0.0079
0.0071
0.11
0.11
1120
0.0040
0.0080
1.7434
0.8791
0.0066
1.5203
0.0079
0.0071
0.11
0.11
1130
0.0040
0.0080
1.7514
0.8857
0.0066
1.5283
0.0079
0.0071
0.11
0.11
1140
0.0040
0.0080
1.7594
0.8922
0.0066
1.5362
0.0079
0.0071
0.11
0.11
1150
0.0040
0.0080
1.7674
0.8988
0.0066
1.5441
0.0079
0.0071
0.11
0.11
1160
0.0040
0.0080
1.7754
0.9054
0.0066
1.5520
0.0079
0.0071
0.11
0.11
1170
0.0040
0.0080
1.7834
0.9121
0.0066
1.5599
0.0079
0.0072
0.11
0.11
1180
0.0040
0.0080
1.7914
0.9187
0.0066
1.5678
0.0079
0.0072
0.11
0.11
1190
0.0040
0.0080
1.7994
0.9253
0.0066
1.5757
0.0079
0.0072
0.11
0.11
1200
0.0040
0.0080
1.8074
0.9319
0.0066
1.5836
0.0079
0.0072
0.11
0.11
1210
0.0040
0.0080
1.8154
0.9386
0.0066
1.5916
0.0079
0.0072
0.11
0.11
1220
0.0040
0.0080
1.8234
0.9452
0.0067
1.5995
0.0079
0.0072
0.11
0.11
1230
0.0040
0.0080
1.8314
0.9519
0.0067
1.6074
0.0079
0.0072
0.11
0.11
1240
0.0040
0.0080
1.8394
0.9586
0.0067
1.6153
0.0079
0.0072
0.11
0.11
1250
0.0040
0.0080
1.8474
0.9652
0.0067
1.6232
0.0079
0.0072
0.11
0.11
1260
0.0040
0.0080
1.8554
0.9719
0.0067
1.6311
0.0079
0.0072
0.11
0.11
1270
0.0040
0.0080
1.8634
0.9786
0.0067
1.6391
0.0079
0.0072
0.11
0.11
1280
0.0040
0.0080
1.8714
0.9853
0.0067
1.6470
0.0079
0.0072
0.11
0.11
1290
0.0040
0.0080
1.8794
0.9920
0.0067
1.6549
0.0079
0.0072
0.11
0.11
1300
0.0040
0.0080
1.8874
0.9987
0.0067
1.6628
0.0079
0.0072
0.11
0.11
1310
0.0040
0.0080
1.8954
1.0055
0.0067
1.6707
0.0079
0.0072
0.11
0.11
1320
0.0040
0.0080
1.9034
1.0122
0.0067
1.6787
0.0079
0.0072
0.11
0.11
1330
0.0040
0.0080
1.9114
1.0189
0.0067
1.6866
0.0079
0.0072
0.11
0.11
1340
0.0040
0.0080
1.9194
1.0257
0.0067
1.6945
0.0079
0.0072
0.11
0.11
1350
0.0040
0.0080
1.9274
1.0324
0.0068
1.7024
0.0079
0.0072
0.11
0.11
1360
0.0040
0.0080
1.9354
1.0392
0.0068
1.7103
0.0079
0.0072
0.11
0.11
1370
0.0040
0.0080
1.9434
1.0460
0.0068
1.7183
0.0079
0.0072
0.11
0.11
1380
0.0040
0.0080
1.9514
1.0527
0.0068
1.7262
0.0079
0.0073
0.11
0.11
1390
0.0040
0.0080
1.9594
1.0595
0.0068
1.7341
0.0079
0.0073
0.11
0.11
1400
0.0040
0.0080
1.9674
1.0663
0.0068
1.7420
0.0079
0.0073
0.11
0.11
1410
0.0040
0.0080
1.9754
1.0731
0.0068
1.7500
0.0079
0.0073
0.11
0.11
1420
0.0040
0.0080
1.9834
1.0799
0.0068
1.7579
0.0079
0.0073
0.11
0.11
1430
0.0040
0.0080
1.9914
1.0867
0.0068
1.7658
0.0079
0.0073
0.11
0.11
1440
0.0040
0.0080
1.9994
1.0935
0.0068
1.7738
0.0079
0.0073
0.11
0.11
D:\DAVE\STORM\2PREPHIS.XLS 6/27/90 @ 10:47 AM Page Z-�- of S1
N.G. Jacobson Associates, Inc.
2 Year Storm - Existing Site Conditions (Surface Parking & Site Only)
Santa Barbara Urban Hydrograph (SBUH); Hydrologic model of drainage features 6/29/90
PROJECT: Valley Medical Center Phase II Parking Garage 8 Improvements
AREA = 1.48 Acres
Pt = 2.0 inches (Total rainfall for 2 year - 24 hour event)
dt = 10 min.
Tc = 3.41 min. (Sheet flow => storm system => existing discharge outlet)
w = 0.5945 (Routing Constant, w = dt/(2Tc + dt))
PERVIOUS Parcel: IMPERVIOUS Parcel:
AREA = 1.45 Acres AREA = 1.03 Acres
CN = 90 CN = 98
S = 1.11 S = 0.20
0.2S = 0.22 0.2S = 0.04 Peak Discharge = 1.01 CFS
Rainfall Incre- Accumu- Accumu- Incre- Accumu- Incre- Instant Design
Time Distri- mental lated lated mental lated mental Total Hydro- Hydro-
bution Rainfall Rainfall Runoff Runoff Runoff Runoff Runoff graph graph
(min.) (% of Pt) (in.) (in.) (in.) (in.) (in.) (in.) (in.) (CFS) (CFS)
10
0.0040
0.0080
0.0080
0.0000
0.0000
0.0000
0.0000
0.0000
0.00
0.00
20
0.0040
0.0080
0.0160
0.0000
0.0000
0.0000
0.0000
0.0000
0.00
0.00
30
0.0040
0.0080
0.0240
0.0000
0.0000
0.0000
0.0000
0.0000
0.00
0.00
40
0.0040
0.0080
0.0320
0.0000
0.0000
0.0000
0.0000
0.0000
0.00
0.00
50
0.0040
0.0080
0.0400
0.0000
0.0000
0.0000
0.0000
0.0000
0.00
0.00
60
0.0040
0.0080
0.0480
0.0000
0.0000
0.0002
0.0002
0.0002
0.00
0.00
70
0.0040
0.0080
0.0560
0.0000
0.0000
0.0011
0.0008
0.0006
0.01
0.00
80
0.0040
0.0080
0.0640
0.0000
0.0000
0.0024
0.0013
0.0009
0.01
0.01
90
0.0040
0.0080
0.0720
0.0000
0.0000
0.0041
0.0018
0.0012
0.01
0.01
100
0.0040
0.0080
0.0800
0.0000
0.0000
0.0063
0.0022
0.0015
0.01
0.01
110
0.0050
0.0100
0.0900
0.0000
0.0000
0.0096
0.0032
0.0023
0.02
0.02
120
0.0050
0.0100
0.1000
0.0000
0.0000
0.0133
0.0038
0.0026
0.02
0.02
130
0.0050
0.0100
0.1100
0.0000
0.0000
0.0175
0.0042
0.0029
0.03
0.03
140
0.0050
0.0100
0.1200
0.0000
0.0000
0.0221
0.0046
0.0032
0.03
0.03
150
0.0050
0.0100
0.1300
0.0000
0.0000
0.0271
0.0050
0.0035
0.03
0.03
160
0.0050
0.0100
0.1400
0.0000
0.0000
0.0324
0.0053
0.0037
0.03
0.03
170
0.0060
0.0120
0.1520
0.0000
0.0000
0.0392
0.0068
0.0047
0.04
0.04
180
0.0060
0.0120
0.1640
0.0000
0.0000
0.0464
0.0072
0.0050
0.04
0.04
190
0.0060
0.0120
0.1760
0.0000
0.0000
0.0539
0.0075
0.0052
0.05
0.05
200
0.0060
0.0120
0.1880
0.0000
0.0000
0.0617
0.0078
0.0054
0.05
0.05
210
0.0060
0.0120
0.2000
0.0000
0.0000
0.0698
0.0081
0.0056
0.05
0.05
220
0.0060
0.0120
0.2120
0.0000
0.0000
0.0781
0.0083
0.0058
0.05
0.05
230
0.0070
0.0140
0.2260
0.0000
0.0000
0.0881
0.0100
0.0070
0.06
0.06
240
0.0070
0.0140
0.2400
0.0003
0.0003
0.0984
0.0103
0.0074
0.07
0.07
250
0.0070
0.0140
0.2540
0.0009
0.0006
0.1089
0.0105
0.0079
0.07
0.07
260
0.0070
0.0140
0.2680
0.0018
0.0009
0.1197
0.0108
0.0084
0.08
0.07
270
0.0070
0.0140
0.2820
0.0031
0.0012
0.1306
0.0110
0.0088
0.08
0.08
280
0.0070
0.0140
0.2960
0.0046
0.0015
0.1418
0.0111
0.0093
0.08
0.08
290
0.0082
0.0164
0.3124
0.0068
0.0022
0.1551
0.0133
0.0114
0.10
0.09
300
0.0082
0.0164
0.3288
0.0093
0.0026
0.1685
0.0135
0.0119
0.11
0.11
310
0.0082
0.0164
0.3452
0.0123
0.0029
0.1822
0.0137
0.0124
0.11
0.11
320
0.0082
0.0164
0.3616
0.0155
0.0033
0.1961
0.0138
0.0128
0.12
0.11
330
0.0082
0.0164
0.3780
0.0192
0.0036
0.2101
0.0140
0.0133
0.12
0.12
340
0.0082
0.0164
0.3944
0.0231
0.0039
0.2242
0.0141
0.0137
0.12
0.12
D:\DAVE\STORM\2STPRE.XLS 6/29/90 a 11:20 AM Page Z of S l
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I
350
0.0095
0.0190
0.4134
0.0281
0.0050
0.2407
0.0165
0.0164
0.15
0.14
360
0.0095
0.0190
0.4324
0.0334
0.0054
0.2574
0.0167
0.0169
0.15
0.15
370
0.0095
0.0190
0.4514
0.0392
0.0058
0.2743
0.0168
0.0174
0.16
0.15
380
0.0095
0.0190
0.4704
0.0453
0.0061
0.2912
0.0170
0.0178
0.16
0.16
390
0.0095
0.0190
0.4894
0.0518
0.0065
0.3083
0.0171
0.0182
0.16
0.16
400
0.0095
0.0190
0.5084
0.0586
0.0068
0.3255
0.0172
0.0186
0.17
0.17
410
0.0133
0.0266
0.5350
0.0687
0.0101
0.3497
0.0242
0.0268
0.24
0.21
420
0.0133
0.0266
0.5616
0.0794
0.0107
0.3742
0.0244
0.0275
0.25
0.25
430
0.0133
0.0266
0.5882
0.0907
0.0113
0.3987
0.0246
0.0281
0.25
0.25
440
0.0180
0.0360
0.6242
0.1068
0.0161
0.4322
0.0335
0.0391
0.35
0.31
450
0.0180
0.0360
0.6602
0.1238
0.0170
0.4659
0.0337
0.0401
0.36
0.36
460
0.0340
0.0680
0.7282
0.1583
0.0345
0.5300
0.0641
0.0784
0.70
0.56
470
0.0540
0.1080
0.8362
0.2185
0.0602
0.6330
0.1030
0.1306
1.17
1.01
480
0.0270
0.0540
0.8902
0.2508
0.0323
0.6848
0.0519
0.0677
0.61
0.87
490
0.0180
0.0360
0.9262
0.2730
0.0222
0.7195
0.0347
0.0459
0.41
0.44
500
0.0134
0.0268
0.9530
0.2899
0.0169
0.7454
0.0259
0.0346
0.31
0.35
510
0.0134
0.0268
0.9798
0.3071
0.0172
0.7713
0.0259
0.0349
0.31
0.30
520
0.0134
0.0268
1.0066
0.3246
0.0175
0.7973
0.0260
0.0352
0.31
0.32
530
0.0088
0.0176
1.0242
0.3362
0.0116
0.8144
0.0171
0.0233
0.21
0.25
540
0.0088
0.0176
1.0418
0.3479
0.0117
0.8315
0.0171
0.0234
0.21
0.20
550
0.0088
0.0176
1.0594
0.3597
0.0118
0.8486
0.0171
0.0235
0.21
0.21
560
0.0088
0.0176
1.0770
0.3717
0.0119
0.8657
0.0171
0.0236
0.21
0.21
570
0.0088
0.0176
1.0946
0.3837
0.0120
0.8828
0.0171
0.0237
0.21
0.21
580
0.0088
0.0176
1.1122
0.3958
0.0121
0.9000
0.0171
0.0238
0.21
0.21
590
0.0088
0.0176
1.1298
0.4080
0.0122
0.9171
0.0172
0.0239
0.21
0.21
600
0.0088
0.0176
1.1474
0.4203
0.0123
0.9343
0.0172
0.0240
0.22
0.21
610
0.0088
0.0176
1.1650
0.4328
0.0124
0.9515
0.0172
0.0241
0.22
0.22
620
0.0088
0.0176
1.1826
0."52
0.0125
0.9686
0.0172
0.0242
0.22
0.22
630
0.0088
0.0176
1.2002
0.4578
0.0126
0.9858
0.0172
0.0243
0.22
0.22
640
0.0088
0.0176
1.2178
0.4705
0.0127
1.0031
0.0172
0.0244
0.22
0.22
650
0.0072
0.0144
1.2322
0.4809
0.0104
1.0171
0.0141
0.0200
0.18
0.20
660
0.0072
0.0144
1.2466
0.4914
0.0105
1.0312
0.0141
0.0201
0.18
0.18
670
0.0072
0.0144
1.2610
0.5019
0.0105
1.0453
0.0141
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0.18
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680
0.0072
0.0144
1.2754
0.5125
0.0106
1.0595
0.0141
0.0202
0.18
0.18
690
0.0072
0.0144
1.2898
0.5231
0.0106
1.0736
0.0141
0.0202
0.18
0.18
700
0.0072
0.0144
1.3042
0.5338
0.0107
1.0877
0.0141
0.0203
0.18
0.18
710
0.0072
0.0144
1.3186
0.5445
0.0107
1.1018
0.0141
0.0203
0.18
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720
0.0072
0.0144
1.3330
0.5553
0.0108
1.1159
0.0141
0.0204
0.18
0.18
730
0.0072
0.0144
1.3474
0.5661
0.0108
1.1301
0.0141
0.0204
0.18
0.18
740
0.0072
0.0144
1.3618
0.5770
0.0109
1.1442
0.0141
0.0205
0.18
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750
0.0072
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1.3762
0.5879
0.0109
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0.0141
0.0205
0.18
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760
0.0072
0.0144
1.3906
0.5989
0.0110
1.1725
0.0141
0.0206
0.18
0.18
770
0.0057
0.0114
1.4020
0.6076
0.0087
1.1837
0.0112
0.0163
0.15
0.16
780
0.0057
0.0114
1.4134
0.6163
0.0087
1.1949
0.0112
0.0164
0.15
0.14
790
0.0057
0.0114
1.4248
0.6251
0.0088
1.2061
0.0112
0.0164
0.15
0.15
800
0.0057
0.0114
1.4362
0.6338
0.0088
1.2173
0.0112
0.0164
0.15
0.15
810
0.0057
0.0114
1.4476
0.6427
0.0088
1.2286
0.0112
0.0164
0.15
0.15
820
0.0057
0.0114
1.4590
0.6515
0.0088
1.2398
0.0112
0.0165
0.15
0.15
830
0.0057
0.0114
1.4704
0.6603
0.0089
1.2510
0.0112
0.0165
0.15
0.15
840
0.0057
0.0114
1.4818
0.6692
0.0089
1.2622
0.0112
0.0165
0.15
0.15
850
0.0057
0.0114
1.4932
0.6781
0.0089
1.2734
0.0112
0.0165
0.15
0.15
860
0.0057
0.0114
1.5046
0.6871
0.0089
1.2847
0.0112
0.0166
0.15
0.15
870
0.0057
0.0114
1.5160
0.6960
0.0090
1.2959
0.0112
0.0166
0.15
0.15
880
0.0057
0.0114
1.5274
0.7050
0.0090
1.3071
0.0112
0.0166
0.15
0.15
890
0.0050
0.0100
1.5374
0.7129
0.0079
1.3170
0.0099
0.0146
0.13
0.14
900
0.0050
0.0100
1.5474
0.7208
0.0079
1.3268
0.0099
0.0146
0.13
0.13
910
0.0050
0.0100
1.5574
0.7287
0.0079
1.3367
0.0099
0.0146
0.13
0.13
920
0.0050
0.0100
1.5674
0.7367
0.0079
1.3466
0.0099
0.0146
0.13
0.13
930
0.0050
0.0100
1.5774
0.7446
0.0080
1.3564
0.0099
0.0147
0.13
0.13
940
0.0050
0.0100
1.5874
0.7526
0.0080
1.3663
0.0099
0.0147
0.13
0.13
950
0.0050
0.0100
1.5974
0.7606
0.0080
1.3762
0.0099
0.0147
0.13
0.13
960
0.0050
0.0100
1.6074
0.7686
0.0080
1.3860
0.0099
0.0147
0.13
0.13
970
0.0050
0.0100
1.6174
0.7767
0.0080
1.3959
0.0099
0.0147
0.13
0.13
980
0.0050
0.0100
1.6274
0.7847
0.0080
1.4058
0.0099
0.0147
0.13
0.13
I
D:\DAVE\STORM\2STPRE.XLS 6/29/90 a 11:20 AM Page Z9 of SI
IN.G. Jacobson Associates, Inc.
' 990 0.0050 0.0100 1.6374 0.7928 0.0081 1.4156 0.0099 0.0148 0.13 0.13
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1.6474
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0.0081
1.4255
0.0099
0.0148
0.13
0.13
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0.0040
0.0080
1.6554
0.8073
0.0065
1.4334
0.0079
0.0118
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0.0080
1.6634
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1.4413
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0.0040
0.0080
1.6794
0.8268
0.0065
1.4571
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1050
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1.6874
0.8333
0.0065
1.4650
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0.0080
1.7434
0.8791
0.0066
1.5203
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0.0040
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0.8857
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1.5283
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0.9054
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0.0040
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1.7834
0.9121
0.0066
1.5599
0.0079
0.0120
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0.0040
0.0080
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0.9187
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1.5678
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1190
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1.7994
0.9253
0.0066
1.5757
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0.9386
0.0066
1.5916
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0.11
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0.0040
0.0080
1.8234
0.9452
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1.0663
0.0068
1.7420
0.0079
0.0122
0.11
0.11
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1.0731
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1420 0.0040 0.0080 1.9834 1.0799 0.0068 1.7579 0.0079 0.0122 0.11 0.11
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1440 0.0040 0.0080 1.9994 1.0935 0.0068 1.7738 0.0079 0.0122 0.11 0.11
D:\DAVE\STORM\2STPRE.XLS 6/29/90 @ 11:20 AM Page �-� of S i
N.G. Jacobson Associates, Inc.
l�
10 Year Storm - Existing Site Conditions (Surface Parking & Site Only)
Santa Barbara Urban Hydrograph (SBUH); Hydrologic model of drainage features 6/29/90
PROJECT: Valley Medical Center Phase II Parki.ng:Garage & Improvements
AREA = 1.48 Acres
Pt = 2.9 inches (Total rainfall for 10 year 24 hour event)
dt = 10 min.
Tc = 3.41 min. (Sheet flow => storm system => existing discharge outlet)
w = 0.5945 (Routing Constant, w = dt/(2Tc + dt))
PERVIOUS Parcel: IMPERVIOUS Parcel:
AREA = 1.45 Acres AREA = 1.03 Acres
CN = 90 CM = 98
S = 1.11 S = 0.20
0.2S = 0.22 0.2S = 0.04 Peak Discharge = 1.65 CFS
Rainfall Incre- Accumu- Accumu- Incre- Accumu- Incre- Instant Design
Time Distri- mental lated lated mental Lated mental Total Hydro- Hydro-
bution Rainfall Rainfall Runoff Runoff Runoff Runoff Runoff graph graph
(min.) (% of Pt) (in.) (in.) (in.) (in.) (in.) (in.) (in.) (CFS) (CFS)
10
0.0040
0.0116
0.0116
0.0000
0.0000
0.0000
0.0000
0.0000
0.00
0.00
20
0.0040
0.0116
0.0232
0.0000
0.0000
0.0000
0.0000
0.0000
0.00
0.00
30
0.0040
0.0116
0.0348
0.0000
0.0000
0.0000
0.0000
0.0000
0.00
0.00
40
0.0040
0.0116
0.0464
0.0000
0.0000
0.0001
0.0001
0.0001
0.00
0.00
50
0.0040
0.0116
0.0580
0.0000
0.0000
0.0013
0.0012
0.0008
0.01
0.00
60
0.0040
0.0116
0.0696
0.0000
0.0000
0.0036
0.0022
0.0015
0.01
0.01
70
0.0040
0.0116
0.0812
0.0000
0.0000
0.0067
0.0031
0.0022
0.02
0.02
80
0.0040
0.0116
0.0928
0.0000
0.0000
0.0106
0.0039
0.0027
0.02
0.02
90
0.0040
0.0116
0.1044
0.0000
0.0000
0.0151
0.0046
0.0032
0.03
0.03
100
0.0040
0.0116
0.1160
0.0000
0.0000
0.0202
0.0051
0.0036
0.03
0.03
110
0.0050
0.0145
0.1305
0.0000
0.0000
0.0274
0.0071
0.0050
0.04
0.04
120
0.0050
0.0145
0.1450
0.0000
0.0000
0.0352
0.0078
0.0055
0.05
0.05
130
0.0050
0.0145
0.1595
0.0000
0.0000
0.0436
0.0084
0.0059
0.05
0.05
140
0.0050
0.0145
0.1740
0.0000
0.0000
0.0526
0.0090
0.0062
0.06
0.05
150
0.0050
0.0145
0.1885
0.0000
0.0000
0.0620
0.0094
0.0065
0.06
0.06
160
0.0050
0.0145
0.2030
0.0000
0.0000
0.0718
0.0098
0.0068
0.06
0.06
170
0.0060
0.0174
0.2204
0.0000
0.0000
0.0841
0.0122
0.0085
0.08
0.07
180
0.0060
0.0174
0.2378
0.0002
0.0002
0.0967
0.0127
0.0090
0.08
0.08
190
0.0060
0.0174
0.2552
0.0010
0.0007
0.1098
0.0131
0.0098
0.09
0.09
200
0.0060
0.0174
0.2726
0.0022
0.0012
0.1233
0.0134
0.0106
0.09
0.09
210
0.0060
0.0174
0.2900
0.0039
0.0017
0.1370
0.0137
0.0112
0.10
0.10
220
0.0060
0.0174
0.3074
0.0061
0.0022
0.1510
0.0140
0.0119
0.11
0.10
230
0.0070
0.0203
0.3277
0.0091
0.0031
0.1676
0.0166
0.0146
0.13
0.12
240
0.0070
0.0203
0.3480
0.0128
0.0036
0.1846
0.0169
0.0154
0.14
0.14
250
0.0070
0.0203
0.3683
0.0170
0.0042
0.2018
0.0172
0.0161
0.14
0.14
260
0.0070
0.0203
0.3886
0.0217
0.0047
0.2192
0.0174
0.0167
0.15
0.15
270
0.0070
0.0203
0.4089
0.0269
0.0052
0.2368
0.0176
0.0173
0.16
0.15
280
0.0070
0.0203
0.4292
0.0325
0.0056
0.2546
0.0178
0.0179
0.16
0.16
290
0.0082
0.0238
0.4530
0.0397
0.0072
0.2757
0.0211
0.0217
0.19
0.18
300
0.0082
0.0238
0.4768
0.0474
0.0078
0.2969
0.0213
0.0224
0.20
0.20
310
0.0082
0.0238
0.5005
0.0558
0.0083
0.3184
0.0214
0.0231
0.21
0.20
320
0.0082
0.0238
0.5243
0.0646
0.0088
0.3400
0.0216
0.0237
0.21
0.21
330
0.0082
0.0238
0.5481
0.0739
0.0093
0.3618
0.0218
0.0243
0.22
0.22
340
0.0082
0.0238
0.5719
0.0837
0.0098
0.3836
0.0219
0.0248
0.22
0.22
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350
0.0095
0.0276
0.5994
0.0956
0.0119
0.4091
0.0255
0.0294
0.26
0.25
360
0.0095
0.0276
0.6270
0.1081
0.0125
0.4348
0.0256
0.0301
0.27
0.27
370
0.0095
0.0276
0.6545
0.1211
0.0130
0.4606
0.0258
0.0307
0.27
0.27
380
0.0095
0.0276
0.6821
0.1346
0.0135
0.4865
0.0259
0.0313
0.28
0.28
390
0.0095
0.0276
0.7096
0.1486
0.0140
0.5124
0.0260
0.0318
0.28
0.28
400
0.0095
0.0276
0.7372
0.1631
0.0145
0.5385
0.0261
0.0323
0.29
0.29
410
0.0133
0.0386
0.7758
0.1841
0.0210
0.5752
0.0367
0.0461
0.41
0.36
420
0.0133
0.0386
0.8143
0.2058
0.0218
0.6120
0.0368
0.0470
0.42
0.43
'
430
0.0133
0.0386
0.8529
0.2284
0.0225
0.6490
0.0370
0.0478
0.43
0.42
440
0.0180
0.0522
0.9051
0.2599
0.0316
0.6992
0.0502
0.0659
0.59
0.52
450
0.0180
0.0522
0.9573
0.2927
0.0327
0.7496
0.0504
0.0671
0.60
0.61
460
0.0340
0.0986
1.0559
0.3574
0.0647
0.8452
0.0956
0.1299
1.16
0.93
470
0.0540
0.1566
1.2125
0.4667
0.1093
0.9979
0.1527
0.2134
1.91
1.65
480
0.0270
0.0783
1.2908
0.5239
0.0572
1.0745
0.0767
0.1094
0.98
1.41
490
0.0180
0.0522
1.3430
0.5628
0.0390
1.1257
0.0512
0.0738
0.66
0.71
500
0.0134
0.0389
1.3819
0.5922
0.0294
1.1639
0.0382
0.0554
0.50
0.55
'
510
0.0134
0.0389
1.4207
0.6219
0.0297
1.2021
0.0382
0.0557
0.50
0.49
520
0.0134
0.0389
1.4596
0.6519
0.0300
1.2403
0.0382
0.0560
0.50
0.50
530
0.0088
0.0255
1.4851
0.6718
0.0199
1.2655
0.0251
0.0370
0.33
0.40
540
0.0088
0.0255
1.5106
0.6918
0.0200
1.2906
0.0251
0.0371
0.33
0.32
550
0.0088
0.0255
1.5361
0.7119
0.0201
1.3157
0.0251
0.0372
0.33
0.34
560
0.0088
0.0255
1.5616
0.7321
0.0202
1.3409
0.0252
0.0373
0.33
0.33
570
0.0088
0.0255
1.5872
0.7524
0.0203
1.3661
0.0252
0.0374
0.34
0.33
580
0.0088
0.0255
1.6127
0.7729
0.0204
1.3912
0.0252
0.0375
0.34
0.34
590
0.0088
0.0255
1.6382
0.7934
0.0205
1.4164
0.0252
0.0376
0.34
0.34
600
0.0088
0.0255
1.6637
0.8140
0.0206
1.4416
0.0252
0.0378
0.34
0.34
610
0.0088
0.0255
1.6892
0.8348
0.0207
1.4668
0.0252
0.0379
0.34
0.34
620
0.0088
0.0255
1.7148
0.8556
0.0208
1.4920
0.0252
0.0380
0.34
0.34
'
630
0.0088
0.0255
1.7403
0.8765
0.0209
1.5173
0.0252
0.0380
0.34
0.34
640
0.0088
0.0255
1.7658
0.8975
0.0210
1.5425
0.0252
0.0381
0.34
0.34
650
0.0072
0.0209
1.7867
0.9148
0.0173
1.5632
0.0206
0.0313
0.28
0.30
660
0.0072
0.0209
1.8076
0.9321
0.0173
1.5838
0.0207
0.0313
0.28
0.28
'
670
0.0072
0.0209
1.8284
0.9494
0.0174
1.6045
0.0207
0.0314
0.28
0.28
680
0.0072
0.0209
1.8493
0.9669
0.0174
1.6251
0.0207
0.0314
0.28
0.28
690
0.0072
0.0209
1.8702
0.9843
0.0175
1.6458
0.0207
0.0315
0.28
0.28
700
0.0072
0.0209
1.8911
1.0018
0.0175
1.6665
0.0207
0.0316
0.28
0.28
710
0.0072
0.0209
1.9120
1.0194
0.0176
1.6871
0.0207
0.0316
0.28
0.28
720
0.0072
0.0209
1.9328
1.0370
0.0176
1.7078
0.0207
0.0317
0.28
0.28
730
0.0072
0.0209
1.9537
1.0547
0.0177
1.7285
0.0207
0.0317
0.28
0.28
740
0.0072
0.0209
1.9746
1.0724
0.0177
1.7492
0.0207
0.0318
0.28
0.28
750
0.0072
0.0209
1.9955
1.0902
0.0178
1.7699
0.0207
0.0318
0.28
0.28
760
0.0072
0.0209
2.0164
1.1080
0.0178
1.7906
0.0207
0.0318
0.29
0.29
770
0.0057
0.0165
2.0329
1.1221
0.0141
1.8070
0.0164
0.0252
0.23
0.25
780
0.0057
0.0165
2.0494
1.1363
0.0142
1.8234
0.0164
0.0253
0.23
0.22
'
790
0.0057
0.0165
2.0660
1.1504
0.0142
1.8397
0.0164
0.0253
0.23
0.23
800
0.0057
0.0165
2.0825
1.1646
0.0142
1.8561
0.0164
0.0253
0.23
0.23
810
0.0057
0.0165
2.0990
1.1789
0.0142
1.8725
0.0164
0.0254
0.23
0.23
820
0.0057
0.0165
2.1155
1.1931
0.0143
1.8889
0.0164
0.0254
0.23
0.23
830
0.0057
0.0165
2.1321
1.2074
0.0143
1.9053
0.0164
0.0254
0.23
0.23
840
0.0057
0.0165
2.1486
1.2217
0.0143
1.9217
0.0164
0.0254
0.23
0.23
850
0.0057
0.0165
2.1651
1.2360
0.0143
1.9381
0.0164
0.0255
0.23
0.23
860
0.0057
0.0165
2.1817
1.2504
0.0144
1.9545
0.0164
0.0255
0.23
0.23
'
870
0.0057
0.0165
2.1982
1.2648
0.0144
1.9709
0.0164
0.0255
0.23
0.23
880
0.0057
0.0165
2.2147
1.2792
0.0144
1.9873
0.0164
0.0255
0.23
0.23
890
0.0050
0.0145
2.2292
1.2918
0.0127
2.0017
0.0144
0.0224
0.20
0.21
900
0.0050
0.0145
2.2437
1.3045
0.0127
2.0161
0.0144
0.0224
0.20
0.20
'
910
0.0050
0.0145
2.2582
1.3172
0.0127
2.0305
0.0144
0.0224
0.20
0.20
920
0.0050
0.0145
2.2727
1.3299
0.0127
2.0449
0.0144
0.0225
0.20
0.20
930
0.0050
0.0145
2.2872
1.3426
0.0127
2.0593
0.0144
0.0225
0.20
0.20
940
0.0050
0.0145
2.3017
1.3553
0.0127
2.0737
0.0144
0.0225
0.20
0.20
950
0.0050
0.0145
2.3162
1.3681
0.0127
2.0881
0.0144
0.0225
0.20
0.20
960
0.0050
0.0145
2.3307
1.3808
0.0128
2.1025
0.0144
0.0225
0.20
0.20
970
0.0050
0.0145
2.3452
1.3936
0.0128
2.1169
0.0144
0.0225
0.20
0.20
'
980
0.0050
0.0145
2.3597
1.4064
0.0128
2.1313
0.0144
0.0226
0.20
0.20
' D:\DAVE\STORM\10STPRE.XLS 6/29/90 @ 11:19 AM Page 3Z of S
N.G. Jacobson Associates, Inc.
1
1
990
0.0050
0.0145
2.3742
1.4192
0.0128
2.1457
0.0144
0.0226
0.20
0.20
1000
0.0050
0.0145
2.3887
1.4321
0.0128
2.1602
0.0144
0.0226
0.20
0.20
1010
0.0040
0.0116
2.4003
1.4423
0.0103
2.1717
0.0115
0.0181
0.16
0.18
1020
0.0040
0.0116
2.4119
1.4526
0.0103
2.1832
0.0115
0.0181
0.16
0.16
1030
0.0040
0.0116
2.4235
1.4629
0.0103
2.1947
0.0115
0.0181
0.16
0.16
1040
0.0040
0.0116
2.4351
1.4732
0.0103
2.2063
0.0115
0.0181
0.16
0.16
1050
0.0040
0.0116
2.4467
1.4835
0.0103
2.2178
0.0115
0.0181
0.16
0.16
1060
0.0040
0.0116
2.4583
1.4938
0.0103
2.2293
0.0115
0.0181
0.16
0.16
1070
0.0040
0.0116
2.4699
1.5042
0.0103
2.2408
0.0115
0.0181
0.16
0.16
1080
0.0040
0.0116
2.4815
1.5145
0.0103
2.2524
0.0115
0.0182
0.16
0.16
1090
0.0040
0.0116
2.4931
1.5248
0.0103
2.2639
0.0115
0.0182
0.16
0.16
1100
0.0040
0.0116
2.5047
1.5352
0.0104
2.2754
0.0115
0.0182
0.16
0.16
1110
0.0040
0.0116
2.5163
1.5455
0.0104
2.2870
0.0115
0.0182
0.16
0.16
1120
0.0040
0.0116
2.5279
1.5559
0.0104
2.2985
0.0115
0.0182
0.16
0.16
1130
0.0040
0.0116
2.5395
1.5663
0.0104
2.3100
0.0115
0.0182
0.16
0.16
1140
0.0040
0.0116
2.5511
1.5767
0.0104
2.3216
0.0115
0.0182
0.16
0.16
1150
0.0040
0.0116
2.5627
1.5871
0.0104
2.3331
0.0115
0.0182
0.16
0.16
1160
0.0040
0.0116
2.5743
1.5975
0.0104
2.3446
0.0115
0.0182
0.16
0.16
1170
0.0040
0.0116
2.5859
1.6079
0.0104
2.3562
0.0115
0.0182
0.16
0.16
1180
0.0040
0.0116
2.5975
1.6183
0.0104
2.3677
0.0115
0.0182
0.16
0.16
1190
0.0040
0.0116
2.6091
1.6287
0.0104
2.3793
0.0115
0.0182
0.16
0.16
1200
0.0040
0.0116
2.6207
1.6392
0.0104
2.3908
0.0115
0.0183.
0.16
0.16
1210
0.0040
0.0116
2.6323
1.6496
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2.4023
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0.0183
0.16
0.16
1220
0.0040
0.0116
2.6439
1.6601
0.0104
2.4139
0.0115
0.0183
0.16
0.16
1230
0.0040
0.0116
2.6555
1.6705
0.0105
2.4254
0.0115
0.0183
0.16
0.16
1240
0.0040
0.0116
2.6671
1.6810
0.0105
2.4369
0.0115
0.0183
0.16
0.16
1250
0.0040
0.0116
2.6787
1.6914
0.0105
2.4485
0.0115
0.0183
0.16
0.16
1260
0.0040
0.0116
2.6903
1.7019
0.0105
2.4600
0.0115
0.0183
0.16
0.16
1270
0.0040
0.0116
2.7019
1.7124
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2.4716
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0.0183
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1280
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2.7135
1.7229
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0.0183
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0.16
1290
0.0040
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2.7251
1.7334
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2.4947
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0.0183
0.16
0.16
1300
0.0040
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2.7367
1.7439
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0.0183
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0.16
1310
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0.0116
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1.75"
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2.5177
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2.7599
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2.5293
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0.0183
0.16
0.16
1330
0.0040
0.0116
2.7715
1.7755
0.0105
2.5408
0.0115
0.0183
0.16
0.16
1340
0.0040
0.0116
2.7831
1.7860
0.0105
2.5524
0.0115
0.0184
0.16
0.16
1350
0.0040
0.0116
2.7947
1.7965
0.0105
2.5639
0.0115
0.0184
0.16
0.16
1360
0.0040
0.0116
2.8063
1.8071
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2.5755
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1370
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2.8179
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2.5870
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0.0184
0.16
0.16
1380
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1.8282
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2.5985
0.0115
0.0184
0.16
0.16
1390
0.0040
0.0116
2.8411
1.8388
0.0106
2.6101
0.0115
0.0184
0.16
0.16
1400
0.0040
0.0116
2.8527
1.8494
0.0106
2.6216
0.0115
0.0184
0.16
0.16
1410
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0.0116
2.8643
1.8599
0.0106
2.6332
0.0115
0.0184
0.16
0.16
1420
0.0040
0.0116
2.8759
1.8705
0.0106
2.6447
0.0115
0.0184
0.16
0.16
1430
0.0040
0.0116
2.8875
1.8811
0.0106
2.6563
0.0115
0.0184
0.16
0.16
1440
0.0040
0.0116
2.8991
1.8917
0.0106
2.6678
0.0115
0.0184
0.16
0.16
D:\DAVE\STORM\10STPRE.XLS
6/29/90 a 11:19 AM
Page � of S l
N.G. Jacobson xouociotro' Inc'
Only)
25 Year Storm
- Existing Site
Conditions (Surface Parking
& Site
Santa Barbara Urban
nvurnyrapx
(eux)/ Hydrologic model of
drainage features
6/29/e0
pxoJsor
Valley Medical Center px ��
Parking u & Improvements
AREA =
1'4aAcres
Pt =
3'4
inches (Total
rainfall
for 25 year ' 24
xdur event)
ut ~
10m/n'
ru ~
3'41
min' (Sheet
flow =^ storm system ~» existing
uio,xorye outlet)
w =
0'5945
(Routing Constant,
x
~ ut/(2rc
~ dt))
Parcel:
IMPERVIOUS
Parcel:PERVIOUS
AREA =
/'45xcreu
AREA ~
1'o3Acres
cw ~
po
cw =
po
u ~
1'11
u ~
o'zo
o'Zo ~
o'uz
o.au =
0'04
Peak Discharge
2.02
Rainfall
Ino,e'
xccwmu'
^ccumu'
zncre'
^crumw'
zncre'
Instant
Design
Time
o/st,i'
mental
lateu
Luted
mental
Lateu
mental
Total
xruru'
nvuro'
uution
Rainfall
Rainfall
Runoff
Runoff
Runoff
Runoff
Runoff
graph
graph
/
rs
10
0'0040
0.0136
0'0136
V'VnVo
0'0000
0'0000
0.0000
0.0000
O'VV
u'Oo
zo
0'0040
0'0136
o'ozra
o'0000
u'noou
0.0000
o'ouoo
0.0000
o'no
o'oo
Ju
0'0040
0'0136
0'0408
o'0000
o'000u
o'ouoo
o'u000
o'000u
o'on
o'oo
*o
o'ou*u
0'0136
0'0544
u'nono
o'onuo
o'000u
u'000u
o'000a
0'01
o'oo
50
V'oo*o
0'0136
o'oauo
u'ouno
o'u000
0'0032
u'ooas
0'0016
0'01
0'01
60
u'oo*n
0'0136
0'0816
o'u000
o'0000
o'ooaa
o'uusa
o'ooas
0.02
0.02
ro
0'0040
0'0136
0'0952
u'uoon
o'onno
0'0114
0'0047
o'oosz
0'03
o'uo
=~
uo
0'0040
0'0136
0'1088
n'0000
o'0000
0'0170
0'0055
0'0039
0'03
o'os
yo
0'0040
0'0136
0'1224
o'onon
u'uoou
0'0233
o'ooao
0'0044
o'o*
0'04
100
u'oo*o
0'0136
0'1360
o'0000
V'unoo
o'oxoo
o'ooro
0'004e
0'04
0'04
110
0'0050
0'0170
0'1530
u'Voon
0'0000
0'0398
0'0095
o'onaa
0'06
o'us
120
0'0050
0.0170
0'1700
0'0000
o'VVVo
0'0501
0'0103
0'0072
0'06
o'oa
130
0'0050
0.0170
0'1870
0'0000
0'0000
0.0610
0'0109
0'0076
0'07
0'07
140
o'ooso
0'0170
0.e040
n'u000
o'0000
0'0725
0'0115
o'oouo
o'ur
o'or
150
o'oosn
0'0170
0'2210
o'000n
o'uoou
0'0845
0'0120
o'oous
o'or
0'07
160
0'0050
0'0170
0.2380
o'000a
0'0002
0'09$9
0'0124
0'0089
u'ou
0'08
170
0'0060
0'0204
0'2584
0'0011
0'0009
0'1123
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D:\DAVE\STORM\25STPRE.XLS
6/29/90
a 11:18
AM
Page `]� S of S
N.G. Jacobson Associates, Inc.
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D:\DAVE\STORM\25STPRE.XLS 6/29/90 a 11:18 AM Page -36� of `.> 1
N.G. Jacobson Associates, Inc.
100 Year Storm - Existing Site Conditions (Surface Parking & Site Only)
Santa Barbara Urban Hydrograph (SBUH); Hydrologic model of drainage features 6/29/90
PROJECT: Valley Medical Center Phase II Parking Garage & Improvements
AREA = 1.48 Acres
Pt = 3.9 inches (Total rainfall for 100 year - 24 hour event)
dt = 10 min.
Tc = 3.41 min. (Sheet flow => storm system => existing discharge outlet)
w = 0.5945 (Routing Constant, w = dt/(2Tc + dt))
PERVIOUS Parcel: IMPERVIOUS Parcel:
AREA = 1.45 Acres AREA = 1.03 Acres
CN = 90 CM = 98
S = 1.11 S = 0.20
0.2S = 0.22 0.25 = 0.04 Peak Discharge = 2.38 CFS
Rainfall Incre- Accumu- Accumu- Incre- Accumu- Incre- Instant Design
Time Distri- mental lated lated mental lated mental Total Hydro- Hydro-
bution Rainfall Rainfall Runoff Runoff Runoff Runoff Runoff graph graph
(min.) (% of Pt) (in.) (in.) (in.) (in.) (in.) (in.) (in.) (CFS) (CFS)
10
0.0040
0.0156
0.0156
0.0000
0.0000
0.0000
0.0000
0.0000
0.00
0.00
20
0.0040
0.0156
0.0312
0.0000
0.0000
0.0000
0.0000
0.0000
0.00
0.00
30
0.0040
0.0156
0.0468
0.0000
0.0000
0.0002
0.0002
0.0001
0.00
0.00
40
0.0040
0.0156
0.0624
0.0000
0.0000
0.0021
0.0019
0.0013
0.01
0.01
50
0.0040
0.0156
0.0780
0.0000
0.0000
0.0057
0.0037
0.0026
0.02
0.02
60
0.0040
0.0156
0.0936
0.0000
0.0000
0.0108
0.0051
0.0036
0.03
0.03
70
0.0040
0.0156
0.1092
0.0000
0.0000
0.0172
0.0063
0.00"
0.04
0.04
80
0.0040
0.0156
0.1248
0.0000
0.0000
0.0245
0.0073
0.0051
0.05
0.04
90
0.0040
0.0156
0.1404
0.0000
0.0000
0.0327
0.0082
0.0057
0.05
0.05
100
0.0040
0.0156
0.1560
0.0000
0.0000
0.0416
0.0089
0.0062
0.06
0.05
110
0.0050
0.0195
0.1755
0.0000
0.0000
0.0535
0.0120
0.0083
0.07
0.07
120
0.0050
0.0195
0.1950
0.0000
0.0000
0.0664
0.0128
0.0089
0.08
0.08
130
0.0050
0.0195
0.2145
0.0000
0.0000
0.0799
0.0135
0.0094
0.08
0.08
140
0.0050
0.0195
0.2340
0.0001
0.0001
0.0939
0.0141
0.0099
0.09
0.09
150
0.0050
0.0195
0.2535
0.0009
0.0007
0.1085
0.0146
0.0109
0.10
0.09
160
0.0050
0.0195
0.2730
0.0022
0.0014
0.1236
0.0150
0.0118
0.11
0.10
170
0.0060
0.0234
0.2964
0.0046
0.0024
0.1421
0.0185
0.0153
0.14
0.12
180
0.0060
0.0234
0.3198
0.0079
0.0032
0.1611
0.0190
0.0164
0.15
0.15
190
0.0060
0.0234
0.3432
0.0119
0.0040
0.1805
0.0194
0.0174
0.16
0.15
200
0.0060
0.0234
0.3666
0.0166
0.0047
0.2003
0.0198
0.0184
0.16
0.16
210
0.0060
0.0234
0.3900
0.0220
0.0054
0.2204
0.0201
0.0193
0.17
0.17
220
0.0060
0.0234
0.4134
0.0281
0.0061
0.2407
0.0203
0.0201
0.18
0.18
230
0.0070
0.0273
0."07
0.0359
0.0078
0.2648
0.0240
0.0244
0.22
0.20
240
0.0070
0.0273
0.4680
0.0445
0.0086
0.2891
0.0243
0.0254
0.23
0.23
250
0.0070
0.0273
0.4953
0.0539
0.0094
0.3136
0.0246
0.0263
0.24
0.23
260
0.0070
0.0273
0.5226
0.0639
0.0100
0.3384
0.0248
0.0271
0.24
0.24
270
0.0070
0.0273
0.5499
0.0746
0.0107
0.3634
0.0250
0.0279
0.25
0.25
280
0.0070
0.0273
0.5772
0.0859
0.0113
0.3885
0.0251
0.0286
0.26
0.25
290
0.0082
0.0320
0.6092
0.1000
0.0140
0.4182
0.0297
0.0344
0.31
0.29
300
0.0082
0.0320
0.6412
0.1147
0.0148
0.4480
0.0298
0.0352
0.32
0.32
310
0.0082
0.0320
0.6731
0.1302
0.0155
0.4780
0.0300
0.0360
0.32
0.32
320
0.0082
0.0320
0.7051
0.1463
0.0161
0.5082
0.0301
0.0368
0.33
0.33
330
0.0082
0.0320
0.7371
0.1630
0.0167
0.5385
0.0303
0.0375
0.34
0.33
340
0.0082
0.0320
0.7691
0.1804
0.0173
0.5689
0.0304
0.0381
0.34
0.34
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0.0095
0.0371
0.8061
0.2011
0.0208
0.6042
0.0353
0.0449
0.40
0.38
360
0.0095
0.0371
0.8432
0.2226
0.0215
0.6397
0.0355
0.0457
0.41
0.41
370
0.0095
0.0371
0.8802
0.2447
0.0221
0.6752
0.0356
0.0464
0.42
0.41
380
0.0095
0.0371
0.9173
0.2675
0.0227
0.7109
0.0357
0.0471
0.42
0.42
390
0.0095
0.0371
0.9543
0.2908
0.0233
0.7467
0.0358
0.0477
0.43
0.43
400
0.0095
0.0371
0.9914
0.3146
0.0239
0.7826
0.0359
0.0483
0.43
0.43
410
0.0133
0.0519
1.0433
0.3489
0.0342
0.8329
0.0503
0.0686
0.61
0.54
420
0.0133
0.0519
1.0951
0.3840
0.0352
0.8833
0.0504
0.0696
0.62
0.63
430
0.0133
0.0519
1.1470
0.4201
0.0360
0.9339
0.0506
0.0705
0.63
0.63
440
0.0180
0.0702
1.2172
0.4700
0.0500
1.0025
0.0686
0.0967
0.87
0.77
450
0.0180
0.0702
1.2874
0.5213
0.0513
1.0712
0.0687
0.0981
0.88
0.89
460
0.0340
0.1326
1.4200
0.6214
0.1000
1.2014
0.1302
0.1886
1.69
1.36
470
0.0540
0.2106
1.6306
0.7873
0.1659
1.4089
0.2075
0.3070
2.75
2.38
480
0.0270
0.1053
1.7359
0.8729
0.0856
1.5129
0.1040
0.1563
1.40
2.02
490
0.0180
0.0702
1.8061
0.9309
0.0579
1.5823
0.0694
0.1051
0.94
1.01
500
0.0134
0.0523
1.8584
0.9744
0.0435
1.6341
0.0517
0.0787
0.70
0.79
510
0.0134
0.0523
1.9106
1.0183
0.0439
1.6858
0.0517
0.0790
0.71
0.69
520
0.0134
0.0523
1.9629
1.0625
0.0442
1.7376
0.0518
0.0793
0.71
0.71
530
0.0088
0.0343
1.9972
1.0916
0.0292
1.7716
0.0340
0.0522
0.47
0.57
540
0.0088
0.0343
2.0315
1.1209
0.0293
1.8056
0.0340
0.0524
0.47
0.45
550
0.0088
0.0343
2.0658
1.1503
0.0294
1.8396
0.0340
0.0525
0.47
0.47
560
0.0088
0.0343
2.1002
1.1798
0.0295
1.8737
0.0340
0.0526
0.47
0.47
570
0.0088
0.0343
2.1345
1.2095
0.0296
1.9077
0.0340
0.0527
0.47
0.47
580
0.0088
0.0343
2.1688
1.2392
0.0297
1.9418
0.0341
0.0528
0.47
0.47
590
0.0088
0.0343
2.2031
1.2691
0.0298
1.9758
0.0341
0.0529
0.47
0.47
600
0.0088
0.0343
2.2374
1.2990
0.0299
2.0099
0.0341
0.0530
0.47
0.47
610
0.0088
0.0343
2.2718
1.3290
0.0300
2.0440
0.0341
0.0531
0.48
0.48
620
0.0088
0.0343
2.3061
1.3591
0.0301
2.0780
0.0341
0.0532
0.48
0.48
630
0.0088
0.0343
2.3404
1.3894
0.0302
2.1121
0.0341
0.0533
0.48
0.48
640
0.0088
0.0343
2.3747
1.4197
0.0303
2.1462
0.0341
0.0534
0.48
0.48
650
0.0072
0.0281
2.4028
1.4445
0.0249
2.1741
0.0279
0.0438
0.39
0.43
660
0.0072
0.0281
2.4309
1.4694
0.0249
2.2020
0.0279
0.0438
0.39
0.39
670
0.0072
0.0281
2.4590
1.4944
0.0250
2.2299
0.0279
0.0439
0.39
0.39
680
0.0072
0.0281
2.4870
1.5194
0.0250
2.2578
0.0279
0.0439
0.39
0.39
690
0.0072
0.0281
2.5151
1.5445
0.0251
2.2858
0.0279
0.0440
0.39
0.39
700
0.0072
0.0281
2.5432
1.5696
0.0251
2.3137
0.0279
0.0440
0.39
0.39
710
0.0072
0.0281
2.5713
1.5947
0.0252
2.3416
0.0279
0.0441
0.39
0.39
720
0.0072
0.0281
2.5994
1.6199
0.0252
2.3695
0.0279
0.0441
0.40
0.40
730
0.0072
0.0281
2.6274
1.6452
0.0253
2.3975
0.0279
0.0442
0.40
0.40
740
0.0072
0.0281
2.6555
1.6705
0.0253
2.4254
0.0279
0.0442
0.40
0.40
750
0.0072
0.0281
2.6836
1.6958
0.0253
2.4533
0.0279
0.0443
0.40
0.40
760
0.0072
0.0281
2.7117
1.7212
0.0254
2.4813
0.0279
0.0443
0.40
0.40
T70
0.0057
0.0222
2.7339
1.7413
0.0201
2.5034
0.0221
0.0351
0.31
0.35
780
0.0057
0.0222
2.7561
1.7615
0.0202
2.5255
0.0221
0.0351
0.31
0.31
790
0.0057
0.0222
2.7784
1.7817
0.0202
2.5476
0.0221
0.0352
0.31
0.32
800
0.0057
0.0222
2.8006
1.8019
0.0202
2.5697
0.0221
0.0352
0.32
0.31
810
0.0057
0.0222
2.8228
1.8221
0.0202
2.5919
0.0221
0.0352
0.32
0.32
820
0.0057
0.0222
2.8451
1.8424
0.0202
2.6140
0.0221
0.0352
0.32
0.32
830
0.0057
0.0222
2.8673
1.8626
0.0203
2.6361
0.0221
0.0353
0.32
0.32
840
0.0057
0.0222
2.8895
1.8829
0.0203
2.6583
0.0221
0.0353
0.32
0.32
850
0.0057
0.0222
2.9117
1.9032
0.0203
2.6804
0.0221
0.0353
0.32
0.32
860
0.0057
0.0222
2.9340
1.9236
0.0203
2.7025
0.0221
0.0353
0.32
0.32
870
0.0057
0.0222
2.9562
1.9439
0.0204
2.7247
0.0221
0.0354
0.32
0.32
880
0.0057
0.0222
2.9784
1.9643
0.0204
2.7468
0.0221
0.0354
0.32
0.32
890
0.0050
0.0195
2.9979
1.9822
0.0179
2.7662
0.0194
0.0310
0.28
0.29
900
0.0050
0.0195
3.0174
2.0001
0.0179
2.7856
0.0194
0.0311
0.28
0.28
910
0.0050
0.0195
3.0369
2.0181
0.0179
2.8050
0.0194
0.0311
0.28
0.28
920
0.0050
0.0195
3.0564
2.0360
0.0179
2.8245
0.0194
0.0311
0.28
0.28
930
0.0050
0.0195
3.0759
2.0540
0.0180
2.8439
0.0194
0.0311
0.28
0.28
940
0.0050
0.0195
3.0954
2.0720
0.0180
2.8633
0.0194
0.0311
0.28
0.28
950
0.0050
0.0195
3.1149
2.0899
0.0180
2.8827
0.0194
0.0311
0.28
0.28
960
0.0050
0.0195
3.1344
2.1079
0.0180
2.9022
0.0194
0.0312
0.28
0.28
970
0.0050
0.0195
3.1539
2.1260
0.0180
2.9216
0.0194
0.0312
0.28
0.28
980
0.0050
0.0195
3.1734
2.1440
0.0180
2.9410
0.0194
0.0312
0.28
0.28
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990
0.0050
0.0195
3.1929
2.1621
0.0180
2.9604
0.0194
0.0312
0.28
0.28
1000
0.0050
0.0195
3.2124
2.1801
0.0181
2.9799
0.0194
0.0312
0.28
0.28
1010
0.0040
0.0156
3.2280
2.1946
0.0145
2.9954
0.0155
0.0250
0.22
0.25
1020
0.0040
0.0156
3.2436
2.2090
0.0145
3.0110
0.0155
0.0250
0.22
0.22
1030
0.0040
0.0156
3.2592
2.2235
0.0145
3.0265
0.0155
0.0250
0.22
0.22
1040
0.0040
0.0156
3.2748
2.2380
0.0145
3.0420
0.0155
0.0250
0.22
0.22
1050
0.0040
0.0156
3.2904
2.2525
0.0145
3.0576
0.0155
0.0250
0.22
0.22
1060
0.0040
0.0156
3.3060
2.2670
0.0145
3.0731
0.0155
0.0250
0.22
0.22
1070
0.0040
0.0156
3.3216
2.2815
0.0145
3.0887
0.0155
0.0250
0.22
0.22
1080
0.0040
0.0156
3.3372
2.2960
0.0145
3.1042
0.0155
0.0250
0.22
0.22
1090
0.0040
0.0156
3.3528
2.3106
0.0145
3.1198
0.0155
0.0251
0.22
0.22
1100
0.0040
0.0156
3.3684
2.3251
0.0145
3.1353
0.0155
0.0251
0.22
0.22
1110
0.0040
0.0156
3.3840
2.3396
0.0145
3.1509
0.0155
0.0251
0.22
0.22
1120
0.0040
0.0156
3.3996
2.3542
0.0145
3.1664
0.0155
0.0251
0.22
0.22
1130
0.0040
0.0156
3.4152
2.3687
0.0146
3.1820
0.0155
0.0251
0.22
0.22
1140
0.0040
0.0156
3.4308
2.3833
0.0146
3.1975
0.0155
0.0251
0.22
0.22
1150
0.0040
0.0156
3.4464
2.3979
0.0146
3.2131
0.0155
0.0251
0.22
0.22
1160
0.0040
0.0156
3.4620
2.4124
0.0146
3.2286
0.0156
0.0251
0.22
0.22
1170
0.0040
0.0156
3.4776
2.4270
0.0146
3.2442
0.0156
0.0251
0.22
0.22
1180
0.0040
0.0156
3.4932
2.4416
0.0146
3.2597
0.0156
0.0251
0.22
0.22
1190
0.0040
0.0156
3.5088
2.4562
0.0146
3.2753
0.0156
0.0251
0.22
0.22
1200
0.0040
0.0156
3.5244
2.4708
0.0146
3.2908
0.0156
0.0251
0.23
0.23
1210
0.0040
0.0156
3.5400
2.4854
0.0146
3.3064
0.0156
0.0251
0.23
0.23
1220
0.0040
0.0156
3.5556
2.5001
0.0146
3.3219
0.0156
0.0251
0.23
0.23
1230
0.0040
0.0156
3.5712
2.5147
0.0146
3.3375
0.0156
0.0252
0.23
0.23
1240
0.0040
0.0156
3.5868
2.5293
0.0146
3.3530
0.0156
0.0252
0.23
0.23
1250
0.0040
0.0156
3.6024
2.5440
0.0146
3.3686
0.0156
0.0252
0.23
0.23
1260
0.0040
0.0156
3.6180
2.5586
0.0146
3.3841
0.0156
0.0252
0.23
0.23
1270
0.0040
0.0156
3.6336
2.5733
0.0147
3.3997
0.0156
0.0252
0.23
0.23
1280
0.0040
0.0156
3.6492
2.5879
0.0147
3.4153
0.0156
0.0252
0.23
0.23
1290
0.0040
0.0156
3.6648
2.6026
0.0147
3.4308
0.0156
0.0252
0.23
0.23
1300
0.0040
0.0156
3.6804
2.6173
0.0147
3.4464
0.0156
0.0252
0.23
0.23
1310
0.0040
0.0156
3.6960
2.6320
0.0147
3.4619
0.0156
0.0252
0.23
0.23
1320
0.0040
0.0156
3.7116
2.6467
0.0147
3.4775
0.0156
0.0252
0.23
0.23
1330
0.0040
0.0156
3.7272
2.6613
0.0147
3.4930
0.0156
0.0252
0.23
0.23
1340
0.0040
0.0156
3.7428
2.6760
0.0147
3.5086
0.0156
0.0252
0.23
0.23
1350
0.0040
0.0156
3.7584
2.6907
0.0147
3.5242
0.0156
0.0252
0.23
0.23
1360
0.0040
0.0156
3.7740
2.7055
0.0147
3.5397
0.0156
0.0252
0.23
0.23
1370
0.0040
0.0156
3.7896
2.7202
0.0147
3.5553
0.0156
0.0252
0.23
0.23
1380
0.0040
0.0156
3.8052
2.7349
0.0147
3.5708
0.0156
0.0253
0.23
0.23
1390
0.0040
0.0156
3.8208
2.7496
0.0147
3.5864
0.0156
0.0253
0.23
0.23
1400
0.0040
0.0156
3.8364
2.7644
0.0147
3.6019
0.0156
0.0253
0.23
0.23
1410
0.0040
0.0156
3.8520
2.7791
0.0147
3.6175
0.0156
0.0253
0.23
0.23
1420
0.0040
0.0156
3.8676
2.7938
0.0147
3.6331
0.0156
0.0253
0.23
0.23
1430
0.0040
0.0156
3.8832
2.8086
0.0148
3.6486
0.0156
0.0253
0.23
0.23
1440
0.0040
0.0156
3.8988
2.8234
0.0148
3.6642
0.0156
0.0253
0.23
0.23
' D:\DAVE\STORM\100STPRE.XLS 6/29/90 a 11:17 AM Page of SI
N.G. Jacobson Associates, Inc.
1
2 Year Storm - Proposed Site Conditions (Surface Parking & Site Only)
Santa Barbara Urban Hydrograph (SBUH); Hydrologic model of drainage features 6/29/90
PROJECT: Valley Medical Center Phase II Parking Garage & Improvements .::::::::::::::::::::::::::::::::::::::::::::
AREA = 1.69 Acres
Pt = 2.0 inches (Total rainfall for 2 year - 24 hour event)
dt = 10 min.
Tc = 3.27 min. (Sheet flow => storm system => existing discharge outlet)
w = 0.6046 (Routing Constant, w = dt/(2Tc + dt))
PERVIOUS Parcel: IMPERVIOUS Parcel:
AREA = 1.45 Acres AREA = 0.24 Acres
CN = 90 CN = 98
S = 1.11 S = 0.20
0.2S = 0.22 0.2S = 0.04 Peak Discharge = 0.58 CFS
Rainfall Incre- Accumu- Accumu- Incre- Accumu- Incre- Instant Design
Time Distri- mental lated lated mental lated mental Total Hydro- Hydro-
bution Rainfall Rainfall Runoff Runoff Runoff Runoff Runoff graph graph
(min.) (% of Pt) (in.) (in.) (in.) (in.) (in.) (in.) (in.) (CFS) (CFS)
10
0.0040
0.0080
0.0080
0.0000
0.0000
0.0000
0.0000
0.0000
0.00
0.00
20
0.0040
0.0080
0.0160
0.0000
0.0000
0.0000
0.0000
0.0000
0.00
0.00
30
0.0040
0.0080
0.0240
0.0000
0.0000
0.0000
0.0000
0.0000
0.00
0.00
40
0.0040
0.0080
0.0320
0.0000
0.0000
0.0000
0.0000
0.0000
0.00
0.00
50
0.0040
0.0080
0.0400
0.0000
0.0000
0.0000
0.0000
0.0000
0.00
0.00
60
0.0040
0.0080
0.0480
0.0000
0.0000
0.0002
0.0002
0.0000
0.00
0.00
70
0.0040
0.0080
0.0560
0.0000
0.0000
0.0011
0.0008
0.0001
0.00
0.00
80
0.0040
0.0080
0.0640
0.0000
0.0000
0.0024
0.0013
0.0002
0.00
0.00
90
0.0040
0.0080
0.0720
0.0000
0.0000
0.0041
0.0018
0.0003
0.00
0.00
100
0.0040
0.0080
0.0800
0.0000
0.0000
0.0063
0.0022
0.0003
0.00
0.00
110
0.0050
0.0100
0.0900
0.0000
0.0000
0.0096
0.0032
0.0005
0.00
0.00
120
0.0050
0.0100
0.1000
0.0000
0.0000
0.0133
0.0038
0.0005
0.01
0.01
130
0.0050
0.0100
0.1100
0.0000
0.0000
0.0175
0.0042
0.0006
0.01
0.01
140
0.0050
0.0100
0.1200
0.0000
0.0000
0.0221
0.0046
0.0007
0.01
0.01
150
0.0050
0.0100
0.1300
0.0000
0.0000
0.0271
0.0050
0.0007
0.01
0.01
160
0.0050
0.0100
0.1400
0.0000
0.0000
0.0324
0.0053
0.0008
0.01_
0.01
170
0.0060
0.0120
0.1520
0.0000
0.0000
0.0392
0.0068
0.0010
0.01
0.01
180
0.0060
0.0120
0.1640
0.0000
0.0000
0.0464
0.0072
0.0010
0.01
0.01
190
0.0060
0.0120
0.1760
0.0000
0.0000
0.0539
0.0075
0.0011
0.01
0.01
200
0.0060
0.0120
0.1880
0.0000
0.0000
0.0617
0.0078
0.0011
0.01
0.01
210
0.0060
0.0120
0.2000
0.0000
0.0000
0.0698
0.0081
0.0011
0.01
0.01
220
0.0060
0.0120
0.2120
0.0000
0.0000
0.0781
0.0083
0.0012
0.01
0.01
230
0.0070
0.0140
0.2260
0.0000
0.0000
0.0881
0.0100
0.0014
0.01
0.01
240
0.0070
0.0140
0.2400
0.0003
0.0003
0.0984
0.0103
0.0017
0.02
0.02
250
0.0070
0.0140
0.2540
0.0009
0.0006
0.1089
0.0105
0.0020
0.02
0.02
260
0.0070
0.0140
0.2680
0.0018
0.0009
0.1197
0.0108
0.0023
0.02
0.02
270
0.0070
0.0140
0.2820
0.0031
0.0012
0.1306
0.0110
0.0026
0.03
0.03
280
0.0070
0.0140
0.2960
0.0046
0.0015
0.1418
0.0111
0.0029
0.03
0.03
290
0.0082
0.0164
0.3124
0.0068
0.0022
0.1551
0.0133
0.0038
0.04
0.04
300
0.0082
0.0164
0.3288
0.0093
0.0026
0.1685
0.0135
0.0041
0.04
0.04
310
0.0082
0.0164
0.3452
0.0123
0.0029
0.1822
0.0137
0.0045
0.05
0.04
320
0.0082
0.0164
0.3616
0.0155
0.0033
0.1961
0.0138
0.0048
0.05
0.05
330
0.0082
0.0164
0.3780
0.0192
0.0036
0.2101
0.0140
0.0051
0.05
0.05
340
0.0082
0.0164
0.3944
0.0231
0.0039
0.2242
0.0141
0.0054
0.06
0.05
ID:\DAVE\STORM\2SITEPST.XLS 6/29/90 a 9:09 AM Page .40 of Sl
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350
0.0095
0.0190
0.4134
0.0281
0.0050
0.2407
0.0165
0.0066
0.07
0.06
360
0.0095
0.0190
0.4324
0.0334
0.0054
0.2574
0.0167
0.0070
0.07
0.07
370
0.0095
0.0190
0.4514
0.0392
0.0058
0.2743
0.0168
0.0073
0.07
0.07
380
0.0095
0.0190
0.4704
0.0453
0.0061
0.2912
0.0170
0.0077
0.08
0.08
390
0.0095
0.0190
0.4894
0.0518
0.0065
0.3083
0.0171
0.0080
0.08
0.08
400
0.0095
0.0190
0.5084
0.0586
0.0068
0.3255
0.0172
0.0083
0.08
0.08
410
0.0133
0.0266
0.5350
0.0687
0.0101
0.3497
0.0242
0.0121
0.12
0.11
420
0.0133
0.0266
0.5616
0.0794
0.0107
0.3742
0.0244
0.0126
0.13
0.13
430
0.0133
0.0266
0.5882
0.0907
0.0113
0.3987
0.0246
0.0132
0.13
0.13
440
0.0180
0.0360
0.6242
0.1068
0.0161
0.4322
0.0335
0.0186
0.19
0.17
450
0.0180
0.0360
0.6602
0.1238
0.0170
0.4659
0.0337
0.0194
0.20
0.20
460
0.0340
0.0680
0.7282
0.1583
0.0345
0.5300
0.0641
0.0387
0.40
0.32
470
0.0540
0.1080
0.8362
0.2185
0.0602
0.6330
0.1030
0.0663
0.68
0.58
480
0.0270
0.0540
0.8902
0.2508
0.0323
0.6848
0.0519
0.0351
0.36
0.50
490
0.0180
0.0360
0.9262
0.2730
0.0222
0.7195
0.0347
0.0240
0.25
0.26
500
0.0134
0.0268
0.9530
0.2899
0.0169
0.7454
0.0259
0.0182
0.19
0.21
510
0.0134
0.0268
0.9798
0.3071
0.0172
0.7713
0.0259
0.0184
0.19
0.18
520
0.0134
0.0268
1.0066
0.3246
0.0175
0.7973
0.0260
0.0187
0.19
0.19
530
0.0088
0.0176
1.0242
0.3362
0.0116
0.8144
0.0171
0.0124
0.13
0.15
540
0.0088
0.0176
1.0418
0.3479
0.0117
0.8315
0.0171
0.0125
0.13
0.12
550
0.0088
0.0176
1.0594
0.3597
0.0118
0.8486
0.0171
0.0126
0.13
0.13
560
0.0088
0.0176
1.0770
0.3717
0.0119
0.8657
0.0171
0.0127
0.13
0.13
570
0.0088
0.0176
1.0946
0.3837
0.0120
0.8828
0.0171
0.0128
0.13
0.13
580
0.0088
0.0176
1.1122
0.3958
0.0121
0.9000
0.0171
0.0128
0.13
0.13
590
0.0088
0.0176
1.1298
0.4080
0.0122
0.9171
0.0172
0.0129
0.13
0.13
600
0.0088
0.0176
1.1474
0.4203
0.0123
0.9343
0.0172
0.0130
0.13
0.13
610
0.0088
0.0176
1.1650
0.4328
0.0124
0.9515
0.0172
0.0131
0.13
0.13
620
0.0088
0.0176
1.1826
0.4452
0.0125
0.9686
0.0172
0.0132
0.13
0.13
630
0.0088
0.0176
1.2002
0.4578
0.0126
0.9858
0.0172
0.0132
0.14
0.14
640
0.0088
0.0176
1.2178
0.4705
0.0127
1.0031
0.0172
0.0133
0.14
0.14
650
0.0072
0.0144
1.2322
0.4809
0.0104
1.0171
0.0141
0.0109
0.11
0.12
660
0.0072
0.0144
1.2466
0.4914
0.0105
1.0312
0.0141
0.0110
0.11
0.11
670
0.0072
0.0144
1.2610
0.5019
0.0105
1.0453
0.0141
0.0110
0.11
0.11
680
0.0072
0.0144
1.2754
0.5125
0.0106
1.0595
0.0141
0.0111
0.11
0.11
690
0.0072
0.0144
1.2898
0.5231
0.0106
1.0736
0.0141
0.0111
0.11
0.11
700
0.0072
0.0144
1.3042
0.5338
0.0107
1.0877
0.0141
0.0112
0.11
0.11
710
0.0072
0.0144
1.3186
0.5445
0.0107
1.1018
0.0141
0.0112
0.11
0.11
720
0.0072
0.0144
1.3330
0.5553
0.0108
1.1159
0.0141
0.0113
0.12
0.11
730
0.0072
0.0144
1.3474
0.5661
0.0108
1.1301
0.0141
0.0113
0.12
0.12
740
0.0072
0.0144
1.3618
0.5770
0.0109
1.1442
0.0141
0.0113
0.12
0.12
750
0.0072
0.0144
1.3762
0.5879
0.0109
1.1584
0.0141
0.0114
0.12
0.12
760
0.0072
0.0144
1.3906
0.5989
0.0110
1.1725
0.0141
0.0114
0.12
0.12
770
0.0057
0.0114
1.4020
0.6076
0.0087
1.1837
0.0112
0.0091
0.09
0.10
780
0.0057
0.0114
1.4134
0.6163
0.0087
1.1949
0.0112
0.0091
0.09
0.09
790
0.0057
0.0114
1.4248
0.6251
0.0088
1.2061
0.0112
0.0091
0.09
0.09
800
0.0057
0.0114
1.4362
0.6338
0.0088
1.2173
0.0112
0.0091
0.09
0.09
810
0.0057
0.0114
1.4476
0.6427
0.0088
1.2286
0.0112
0.0092
0.09
0.09
820
0.0057
0.0114
1.4590
0.6515
0.0088
1.2398
0.0112
0.0092
0.09
0.09
830
0.0057
0.0114
1.4704
0.6603
0.0089
1.2510
0.0112
0.0092
0.09
0.09
840
0.0057
0.0114
1.4818
0.6692
0.0089
1.2622
0.0112
0.0092
0.09
0.09
850
0.0057
0.0114
1.4932
0.6781
0.0089
1.2734
0.0112
0.0092
0.09
0.09
860
0.0057
0.0114
1.5046
0.6871
0.0089
1.2847
0.0112
0.0093
0.09
0.09
870
0.0057
0.0114
1.5160
0.6960
0.0090
1.2959
0.0112
0.0093
0.09
0.09
880
0.0057
0.0114
1.5274
0.7050
0.0090
1.3071
0.0112
0.0093
0.10
0.10
890
0.0050
0.0100
1.5374
0.7129
0.0079
1.3170
0.0099
0.0082
0.08
0.09
900
0.0050
0.0100
1.5474
0.7208
0.0079
1.3268
0.0099
0.0082
0.08
0.08
910
0.0050
0.0100
1.5574
0.7287
0.0079
1.3367
0.0099
0.0082
0.08
0.08
920
0.0050
0.0100
1.5674
0.7367
0.0079
1.3466
0.0099
0.0082
0.08
0.08
930
0.0050
0.0100
1.5774
0.7446
0.0080
1.3564
0.0099
0.0082
0.08
0.08
940
0.0050
0.0100
1.5874
0.7526
0.0080
1.3663
0.0099
0.0082
0.08
0.08
950
0.0050
0.0100
1.5974
0.7606
0.0080
1.3762
0.0099
0.0083
0.08
0.08
960
0.0050
0.0100
1.6074
0.7686
0.0080
1.3860
0.0099
0.0083
0.08
0.08
970
0.0050
0.0100
1.6174
0.7767
0.0080
1.3959
0.0099
0.0083
0.08
0.08
980
0.0050
0.0100
1.6274
0.7847
0.0080
1.4058
0.0099
0.0083
0.08
0.08
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0.0050
0.0100
1.6374
0.7928
0.0081
1.4156
0.0099
0.0083
0.09
0.08
1000
0.0050
0.0100
1.6474
0.8008
0.0081
1.4255
0.0099
0.0083
0.09
0.09
1010
0.0040
0.0080
1.6554
0.8073
0.0065
1.4334
0.0079
0.0067
0.07
0.07
1020
0.0040
0.0080
1.6634
0.8138
0.0065
1.4413
0.0079
0.0067
0.07
0.07
1030
0.0040
0.0080
1.6714
0.8203
0.0065
1.4492
0.0079
0.0067
0.07
0.07
1040
0.0040
0.0080
1.6794
0.8268
0.0065
1.4571
0.0079
0.0067
0.07
0.07
1050
0.0040
0.0080
1.6874
0.8333
0.0065
1.4650
0.0079
0.0067
0.07
0.07
1060
0.0040
0.0080
1.6954
0.8398
0.0065
1.4729
0.0079
0.0067
0.07
0.07
1070
0.0040
0.0080
1.7034
0.8463
0.0065
1.4808
0.0079
0.0067
0.07
0.07
1080
0.0040
0.0080
1.7114
0.8528
0.0065
1.4887
0.0079
0.0067
0.07
0.07
1090
0.0040
0.0080
1.7194
0.8594
0.0065
1.4966
0.0079
0.0067
0.07
0.07
1100
0.0040
0.0080
1.7274
0.8659
0.0066
1.5045
0.0079
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0.07
0.07
1110
0.0040
0.0080
1.7354
0.8725
0.0066
1.5124
0.0079
0.0068
0.07
0.07
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0.0040
0.0080
1.7434
0.8791
0.0066
1.5203
0.0079
0.0068
0.07
0.07
1130
0.0040
0.0080
1.7514
0.8857
0.0066
1.5283
0.0079
0.0068
0.07
0.07
1140
0.0040
0.0080
1.7594
0.8922
0.0066
1.5362
0.0079
0.0068
0.07
0.07
1150
0.0040
0.0080
1.7674
0.8988
0.0066
1.5441
0.0079
0.0068
0.07
0.07
1160
0.0040
0.0080
1.7754
0.9054
0.0066
1.5520
0.0079
0.0068
0.07
0.07
1170
0.0040
0.0080
1.7834
0.9121
0.0066
1.5599
0.0079
0.0068
0.07
0.07
1180
0.0040
0.0080
1.7914
0.9187
0.0066
1.5678
0.0079
0.0068
0.07
0.07
1190
0.0040
0.0080
1.7994
0.9253
0.0066
1.5757
0.0079
0.0068
0.07
0.07
1200
0.0040
0.0080
1.8074
0.9319
0.0066
1.5836
0.0079
0.0068
0.07
0.07
1210
0.0040
0.0080
1.8154
0.9386
0.0066
1.5916
0.0079
0.0068
0.07
0.07
1220
0.0040
0.0080
1.8234
0.9452
0.0067
1.5995
0.0079
0.0068
0.07
0.07
1230
0.0040
0.0080
1.8314
0.9519
0.0067
1.6074
0.0079
0.0068
0.07
0.07
1240
0.0040
0.0080
1.8394
0.9586
0.0067
1.6153
0.0079
0.0068
0.07
0.07
1250
0.0040
0.0080
1.8474
0.9652
0.0067
1.6232
0.0079
0.0069
0.07
0.07
1260
0.0040
0.0080
1.8554
0.9719
0.0067
1.6311
0.0079
0.0069
0.07
0.07
1270
0.0040
0.0080
1.8634
0.9786
0.0067
1.6391
0.0079
0.0069
0.07
0.07
1280
0.0040
0.0080
1.8714
0.9853
0.0067
1.6470
0.0079
0.0069
0.07
0.07
1290
0.0040
0.0080
1.8794
0.9920
0.0067
1.6549
0.0079
0.0069
0.07
0.07
1300
0.0040
0.0080
1.8874
0.9987
0.0067
1.6628
0.0079
0.0069
0.07
0.07
1310
0.0040
0.0080
1.8954
1.0055
0.0067
1.6707
0.0079
0.0069
0.07
0.07
1320
0.0040
0.0080
1.9034
1.0122
0.0067
1.6787
0.0079
0.0069
0.07
0.07
1330
0.0040
0.0080
1.9114
1.0189
0.0067
1.6866
0.0079
0.0069
0.07
0.07
1340
0:0040
0.0080
1.9194
1.0257
0.0067
1.6945
0.0079
0.0069
0.07
0.07
1350
0.0040
0.0080
1.9274
1.0324
0.0068
1.7024
0.0079
0.0069
0.07
0.07
1360
0.0040
0.0080
1.9354
1.0392
0.0068
1.7103
0.0079
0.0069
0.07
0.07
1370
0.0040
0.0080
1.9434
1.0460
0.0068
1.7183
0.0079
0.0069
0.07
0.07
1380
0.0040
0.0080
1.9514
1.0527
0.0068
1.7262
0.0079
0.0069
0.07
0.07
1390
0.0040
0.0080
1.9594
1.0595
0.0068
1.7341
0.0079
0.0069
0.07
0.07
1400
0.0040
0.0080
1.9674
1.0663
0.0068
1.7420
0.0079
0.0069
0.07
0.07
1410
0.0040
0.0080
1.9754
1.0731
0.0068
1.7500
0.0079
0.0070
0.07
0.07
1420
0.0040
0.0080
1.9834
1.0799
0.0068
1.7579
0.0079
0.0070
0.07
0.07
1430
0.0040
0.0080
1.9914
1.0867
0.0068
1.7658
0.0079
0.0070
0.07
0.07
1440
0.0040
0.0080
1.9994
1.0935
0.0068
1.7738
0.0079
0.0070
0.07
0.07
D:\DAVE\STORM\2SITEPST.XLS 6/29/90 a 9:09 AM Page 4Z of S t
N.G. Jacobson Associates, Inc.
10 Year Storm - Proposed Site Conditions (Surface Parking & Site Only)
Santa Barbara Urban Hydrograph (SBUH); Hydrologic model of drainage features 6/29/90
PROJECT: Valley Medical Center Phase 11 Parking Garage & Improvements
AREA = 1.69 Acres
Pt = 2.9 inches (Total rainfall for 10 year - 24 hour event)
dt = 10 min.
Tc = 3.27 min. (Sheet flow => storm system => existing discharge outlet)
w = 0.6046 (Routing Constant, w = dt/(2Tc + dt))
PERVIOUS Parcel: IMPERVIOUS Parcel:
AREA = 1.45 Acres AREA = 0.24 Acres
CN = 90 CN = 98
S = 1.11 S = 0.20
0.2S = 0.22 0.25 = 0.04 Peak Discharge = 1.02 CFS
Rainfall
Incre-
Accumu-
Accumu-
Incre-
Accumu-
Incre-
Instant
Design
Time Distri-
mental
lated
lated
mental
Lated
mental
Total Hydro-
Hydro -
but ion
Rainfall
Rainfall
Runoff
Runoff
Runoff
Runoff
Runoff graph
graph
(min.) (% of Pt)
(in.)
(in.)
(in.)
(in.)
(in.)
(in.)
(in.) (CFS)
(CFS)
10
0.0040
0.0116
0.0116
0.0000
0.0000
0.0000
0.0000
0.0000
0.00
0.00
20
0.0040
0.0116
0.0232
0.0000
0.0000
0.0000
0.0000
0.0000
0.00
0.00
30
0.0040
0.0116
0.0348
0.0000
0.0000
0.0000
0.0000
0.0000
0.00
0.00
40
0.0040
0.0116
0.0464
0.0000
0.0000
0.0001
0.0001
0.0000
0.00
0.00
50
0.0040
0.0116
0.0580
0.0000
0.0000
0.0013
0.0012
0.0002
0.00
0.00
60
0.0040
0.0116
0.0696
0.0000
0.0000
0.0036
0.0022
0.0003
0.00
0.00
70
0.0040
0.0116
0.0812
0.0000
0.0000
0.0067
0.0031
0.0004
0.00
0.00
80
0.0040
0.0116
0.0928
0.0000
0.0000
0.0106
0.0039
0.0006
0.01
0.01
90
0.0040
0.0116
0.1044
0.0000
0.0000
0.0151
0.0046
0.0006
0.01
0.01
100
0.0040
0.0116
0.1160
0.0000
0.0000
0.0202
0.0051
0.0007
0.01
0.01
110
0.0050
0.0145
0.1305
0.0000
0.0000
0.0274
0.0071
0.0010
0.01
0.01
120
0.0050
0.0145
0.1450
0.0000
0.0000
0.0352
0.0078
0.0011
0.01
0.01
130
0.0050
0.0145
0.1595
0.0000
0.0000
0.0436
0.0084
0.0012
0.01
0.01
140
0.0050
0.0145
0.1740
0.0000
0.0000
0.0526
0.0090
0.0013
0.01
0.01
150
0.0050
0.0145
0.1885
0.0000
0.0000
0.0620
0.0094
0.0013
0.01
0.01
160
0.0050
0.0145
0.2030
0.0000
0.0000
0.0718
0.0098
0.0014
0.01
0.01
170
0.0060
0.0174
0.2204
0.0000
0.0000
0.0841
0.0122
0.0017
0.02
0.02
180
0.0060
0.0174
0.2378
0.0002
0.0002
0.0967
0.0127
0.0020
0.02
0.02
190
0.0060
0.0174
0.2552
0.0010
0.0007
0.1098
0.0131
0.0025
0.03
0.02
200
0.0060
0.0174
0.2726
0.0022
0.0012
0.1233
0.0134
0.0030
0.03
0.03
210
0.0060
0.0174
0.2900
0.0039
0.0017
0.1370
0.0137
0.0034
0.03
0.03
220
0.0060
0.0174
0.3074
0.0061
0.0022
0.1510
0.0140
0.0038
0.04
0.04
230
0.0070
0.0203
0.3277
0.0091
0.0031
0.1676
0.0166
0.0050
0.05
0.05
240
0.0070
0.0203
0.3480
0.0128
0.0036
0.1846
0.0169
0.0055
0.06
0.06
250
0.0070
0.0203
0.3683
0.0170
0.0042
0.2018
0.0172
0.0060
0.06
0.06
260
0.0070
0.0203
0.3886
0.0217
0.0047
0.2192
0.0174
0.0065
0.07
0.06
270
0.0070
0.0203
0.4089
0.0269
0.0052
0.2368
0.0176
0.0070
0.07
0.07
280
0.0070
0.0203
0.4292
0.0325
0.0056
0.2546
0.0178
0.0074
0.08
0.07
290
0.0082
0.0238
0.4530
0.0397
0.0072
0.2757
0.0211
0.0092
0.09
0.09
300
0.0082
0.0238
0.4768
0.0474
0.0078
0.2969
0.0213
0.0097
0.10
0.10
310
0.0082
0.0238
0.5005
0.0558
0.0083
0.3184
0.0214
0.0102
0.10
0.10
320
0.0082
0.0238
0.5243
0.0646
0.0088
0.3400
0.0216
0.0106
0.11
0.11
330
0.0082
0.0238
0.5481
0.0739
0.0093
0.3618
0.0218
0.0111
0.11
0.11
340
0.0082
0.0238
0.5719
0.0837
0.0098
0.3836
0.0219
0.0115
0.12
0.12
D:\DAVE\STORM\10SITPST.XLS
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a 9:11
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350
0.0095
0.0276
0.5994
0.0956
0.0119
0.4091
0.0255
0.0138
0.14
0.13
360
0.0095
0.0276
0.6270
0.1081
0.0125
0.4348
0.0256
0.0143
0.15
0.15
370
0.0095
0.0276
0.6545
0.1211
0.0130
0.4606
0.0258
0.0148
0.15
0.15
380
0.0095
0.0276
0.6821
0.1346
0.0135
0.4865
0.0259
0.0153
0.16
0.15
390
0.0095
0.0276
0.7096
0.1486
0.0140
0.5124
0.0260
0.0157
0.16
0.16
400
0.0095
0.0276
0.7372
0.1631
0.0145
0.5385
0.0261
0.0161
0.16
0.16
410
0.0133
0.0386
0.7758
0.1841
0.0210
0.5752
0.0367
0.0232
0.24
0.21
420
0.0133
0.0386
0.8143
0.2058
0.0218
0.6120
0.0368
0.0239
0.24
0.25
430
0.0133
0.0386
0.8529
0.2284
0.0225
0.6490
0.0370
0.0246
0.25
0.25
440
0.0180
0.0522
0.9051
0.2599
0.0316
0.6992
0.0502
0.0342
0.35
0.31
450
0.0180
0.0522
0.9573
0.2927
0.0327
0.7496
0.0504
0.0352
0.36
0.36
460
0.0340
0.0986
1.0559
0.3574
0.0647
0.8452
0.0956
0.0691
0.71
0.57
470
0.0540
0.1566
1.2125
0.4667
0.1093
0.9979
0.1527
0.1155
1.18
1.02
480
0.0270
0.0783
1.2908
0.5239
0.0572
1.0745
0.0767
0.0600
0.61
0.87
490
0.0180
0.0522
1.3430
0.5628
0.0390
1.1257
0.0512
0.0407
0.42
0.44
500
0.0134
0.0389
1.3819
0.5922
0.0294
1.1639
0.0382
0.0306
0.31
0.35
510
0.0134
0.0389
1.4207
0.6219
0.0297
1.2021
0.0382
0.0309
0.32
0.31
520
0.0134
0.0389
1.4596
0.6519
0.0300
1.2403
0.0382
0.0312
0.32
0.32
530
0.0088
0.0255
1.4851
0.6718
0.0199
1.2655
0.0251
0.0206
0.21
0.25
540
0.0088
0.0255
1.5106
0.6918
0.0200
1.2906
0.0251
0.0207
0.21
0.20
550
0.0088
0.0255
1.5361
0.7119
0.0201
1.3157
0.0251
0.0208
0.21
0.21
560
0.0088
0.0255
1.5616
0.7321
0.0202
1.3409
0.0252
0.0209
0.21
0.21
570
0.0088
0.0255
1.5872
0.7524
0.0203
1.3661
0.0252
0.0210
0.21
0.21
580
0.0088
0.0255
1.6127
0.7729
0.0204
1.3912
0.0252
0.0211
0.22
0.22
590
0.0088
0.0255
1.6382
0.7934
0.0205
1.4164
0.0252
0.0212
0.22
0.22
600
0.0088
0.0255
1.6637
0.8140
0.0206
1.4416
0.0252
0.0213
0.22
0.22
610
0.0088
0.0255
1.6892
0.8348
0.0207
1.4668
0.0252
0.0214
0.22
0.22
620
0.0088
0.0255
1.7148
0.8556
0.0208
1.4920
0.0252
0.0214
0.22
0.22
630
0.0088
0.0255
1.7403
0.8765
0.0209
1.5173
0.0252
0.0215
0.22
0.22
640
0.0088
0.0255
1.7658
0.8975
0.0210
1.5425
0.0252
0.0216
0.22
0.22
650
0.0072
0.0209
1.7867
0.9148
0.0173
1.5632
0.0206
0.0177
0.18
0.20
660
0.0072
0.0209
1.8076
0.9321
0.0173
1.5838
0.0207
0.0178
0.18
0.18
670
0.0072
0.0209
1.8284
0.9494
0.0174
1.6045
0.0207
0.0178
0.18
0.18
680
0.0072
0.0209
1.8493
0.9669
0.0174
1.6251
0.0207
0.0179
0.18
0.18
690
0.0072
0.0209
1.8702
0.9843
0.0175
1.6458
0.0207
0.0179
0.18
0.18
700
0.0072
0.0209
1.8911
1.0018
0.0175
1.6665
0.0207
0.0180
0.18
0.18
710
0.0072
0.0209
1.9120
1.0194
0.0176
1.6871
0.0207
0.0180
0.18
0.18
720
0.0072
0.0209
1.9328
1.0370
0.0176
1.7078
0.0207
0.0181
0.18
0.18
730
0.0072
0.0209
1.9537
1.0547
0.0177
1.7285
0.0207
0.0181
0.19
0.18
740
0.0072
0.0209
1.9746
1.0724
0.0177
1.7492
0.0207
0.0181
0.19
0.19
750
0.0072
0.0209
1.9955
1.0902
0.0178
1.7699
0.0207
0.0182
0.19
0.19
760
0.0072
0.0209
2.0164
1.1080
0.0178
1.7906
0.0207
0.0182
0.19
0.19
770
0.0057
0.0165
2.0329
1.1221
0.0141
1.8070
0.0164
0.0144
0.15
0.16
780
0.0057
0.0165
2.0494
1.1363
0.0142
1.8234
0.0164
0.0145
0.15
0.14
790
0.0057
0.0165
2.0660
1.1504
0.0142
1.8397
0.0164
0.0145
0.15
0.15
800
0.0057
0.0165
2.0825
1.1646
0.0142
1.8561
0.0164
0.0145
0.15
0.15
810
0.0057
0.0165
2.0990
1.1789
0.0142
1.8725
0.0164
0.0145
0.15
0.15
820
0.0057
0.0165
2.1155
1.1931
0.0143
1.8889
0.0164
0.0146
0.15
0.15
830
0.0057
0.0165
2.1321
1.2074
0.0143
1.9053
0.0164
0.0146
0.15
0.15
840
0.0057
0.0165
2.1486
1.2217
0.0143
1.9217
0.0164
0.0146
0.15
0.15
850
0.0057
0.0165
2.1651
1.2360
0.0143
1.9381
0.0164
0.0146
0.15
0.15
860
0.0057
0.0165
2.1817
1.2504
0.0144
1.9545
0.0164
0.0146
0.15
0.15
870
0.0057
0.0165
2.1982
1.2648
0.0144
1.9709
0.0164
0.0147
0.15
0.15
880
0.0057
0.0165
2.2147
1.2792
0.0144
1.9873
0.0164
0.0147
0.15
0.15
890
0.0050
0.0145
2.2292
1.2918
0.0127
2.0017
0.0144
0.0129
0.13
0.14
900
0.0050
0.0145
2.2437
1.3045
0.0127
2.0161
0.0144
0.0129
0.13
0.13
910
0.0050
0.0145
2.2582
1.3172
0.0127
2.0305
0.0144
0.0129
0.13
0.13
920
0.0050
0.0145
2.2727
1.3299
0.0127
2.0449
0.0144
0.0129
0.13
0.13
930
0.0050
0.0145
2.2872
1.3426
0.0127
2.0593
0.0144
0.0130
0.13
0.13
940
0.0050
0.0145
2.3017
1.3553
0.0127
2.0737
0.0144
0.0130
0.13
0.13
950
0.0050
0.0145
2.3162
1.3681
0.0127
2.0881
0.0144
0.0130
0.13
0.13
960
0.0050
0.0145
2.3307
1.3808
0.0128
2.1025
0.0144
0.0130
0.13
0.13
970
0.0050
0.0145
2.3452
1.3936
0.0128
2.1169
0.0144
0.0130
0.13
0.13
980
0.0050
0.0145
2.3597
1.4064
0.0128
2.1313
0.0144
0.0130
0.13
0.13
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990
0.0050
0.0145
2.3742
1.4192
0.0128
2.1457
0.0144
0.0130
0.13
0.13
1000
0.0050
0.0145
2.3887
1.4321
0.0128
2.1602
0.0144
0.0131
0.13
0.13
1010
0.0040
0.0116
2.4003
1.4423
0.0103
2.1717
0.0115
0.0104
0.11
0.12
1020
0.0040
0.0116
2.4119
1.4526
0.0103
2.1832
0.0115
0.0105
0.11
0.10
1030
0.0040
0.0116
2.4235
1.4629
0.0103
2.1947
0.0115
0.0105
0.11
0.11
1040
0.0040
0.0116
2.4351
1.4732
0.0103
2.2063
0.0115
0.0105
0.11
0.11
1050
0.0040
0.0116.
2.4467
1.4835
0.0103
2.2178
0.0115
0.0105
0.11
0.11
1060
0.0040
0.0116
2.4583
1.4938
0.0103
2.2293
0.0115
0.0105
0.11
0.11
1070
0.0040
0.0116
2.4699
1.5042
0.0103
2.2408
0.0115
0.0105
0.11
0.11
1080
0.0040
0.0116
2.4815
1.5145
0.0103
2.2524
0.0115
0.0105
0.11
0.11
1090
0.0040
0.0116
2.4931
1.5248
0.0103
2.2639
0.0115
0.0105
0.11
0.11
1100
0.0040
0.0116
2.5047
1.5352
0.0104
2.2754
0.0115
0.0105
0.11
0.11
1110
0.0040
0.0116
2.5163
1.5455
0.0104
2.2870
0.0115
0.0105
0.11
0.11
1120
0.0040
0.0116
2.5279
1.5559
0.0104
2.2985
0.0115
0.0105
0.11
0.11
1130
0.0040
0.0116
2.5395
1.5663
0.0104
2.3100
0.0115
0.0105
0.11
0.11
1140
0.0040
0.0116
2.5511
1.5767
0.0104
2.3216
0.0115
0.0105
0.11
0.11
1150
0.0040
0.0116
2.5627
1.5871
0.0104
2.3331
0.0115
0.0106
0.11
0.11
1160
0.0040
0.0116
2.5743
1.5975
0.0104
2.3"6
0.0115
0.0106
0.11
0.11
1170
0.0040
0.0116
2.5859
1.6079
0.0104
2.3562
0.0115
0.0106
0.11
0.11
1180
0.0040
0.0116
2.5975
1.6183
0.0104
2.3677
0.0115
0.0106
0.11
0.11
1190
0.0040
0.0116
2.6091
1.6287
0.0104
2.3793
0.0115
0.0106
0.11
0.11
1200
0.0040
0.0116
2.6207
1.6392
0.0104
2.3908
0.0115
0.0106
0.11
0.11
1210
0.0040
0.0116
2.6323
1.6496
0.0104
2.4023
0.0115
0.0106
0.11
0.11
1220
0.0040
0.0116
2.6439
1.6601
0.0104
2.4139
0.0115
0.0106
0.11
0.11
1230
0.0040
0.0116
2.6555
1.6705
0.0105
2.4254
0.0115
0.0106
0.11
0.11
1240
0.0040
0.0116
2.6671
1.6810
0.0105
2.4369
0.0115
0.0106
0.11
0.11
1250
0.0040
0.0116
2.6787
1.6914
0.0105
2.4485
0.0115
0.0106
0.11
0.11
1260
0.0040
0.0116
2.6903
1.7019
0.0105
2.4600
0.0115
0.0106
0.11
0.11
1270
0.0040
0.0116
2.7019
1.7124
0.0105
2.4716
0.0115
0.0106
0.11
0.11
1280
0.0040
0.0116
2.7135
1.7229
0.0105
2.4831
0.0115
0.0106
0.11
0.11
1290
0.0040
0.0116
2.7251
1.7334
0.0105
2.4947
0.0115
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0.11
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0.0040
0.0116
2.7367
1.7439
0.0105
2.5062
0.0115
0.0107
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0.0040
0.0116
2.7483
1.7544
0.0105
2.5177
0.0115
0.0107
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0.11
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0.0040
0.0116
2.7599
1.7649
0.0105
2.5293
0.0115
0.0107
0.11
0.11
1330
0.0040
0.0116
2.7715
1.7755
0.0105
2.5408
0.0115
0.0107
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0.11
1340
0.0040
0.0116
2.7831
1.7860
0.0105
2.5524
0.0115
0.0107
0.11
0.11
1350
0.0040
0.0116
2.7947
1.7965
0.0105
2.5639
0.0115
0.0107
0.11
0.11
1360
0.0040
0.0116
2.8063
1.8071
0.0105
2.5755
0.0115
0.0107
0.11
0.11
1370
0.0040
0.0116
2.8179
1.8176
0.0106
2.5870
0.0115
0.0107
0.11
0.11
1380
0.0040
0.0116
2.8295
1.8282
0.0106
2.5985
0.0115
0.0107
0.11
0.11
1390
0.0040
0.0116
2.8411
1.8388
0.0106
2.6101
0.0115
0.0107
0.11
0.11
1400
0.0040
0.0116
2.8527
1.8494
0.0106
2.6216
0.0115
0.0107
0.11
0.11
1410
0.0040
0.0116
2.8643
1.8599
0.0106
2.6332
0.0115
0.0107
0.11
0.11
1420
0.0040
0.0116
2.8759
1.8705
0.0106
2.6447
0.0115
0.0107
0.11
0.11
1430
0.0040
0.0116
2.8875
1.8811
0.0106
2.6563
0.0115
0.0107
0.11
0.11
1440
0.0040
0.0116
2.8991
1.8917
0.0106
2.6678
0.0115
0.0107
0.11
0.11
D:\DAVE\STORM\10SITPST.XLS 6/29/90 a 9:11 AM Page ZcS of SI
N.G. Jacobson Associates, Inc.
25 Year Storm - Proposed Site Conditions (Surface Parking & Site Only)
Santa Barbara Urban Hydrograph (SBUH); Hydrologic model of drainage features 6/29/90
PROJECT: Valley Medical Center Phase II Parking Garage & Improvements :; _ :: :::::
AREA = 1.69 Acres
Pt = 3.4 inches (Total rainfall for 25 year - 24 hour event)
dt = 10 min.
Tc = 3.27 min. (Sheet flow => storm system => existing discharge outlet)
w = 0.6046 (Routing Constant, w = dt/(2Tc + dt))
PERVIOUS Parcel: IMPERVIOUS Parcel:
AREA = 1.45 Acres AREA = 0.24 Acres
CN = 90 CN = 98
S = 1.11 S = 0.20
0.2S = 0.22 0.25 = 0.04 Peak Discharge = 1.27 CFS
Rainfall Incre- Accumu- Accumu- Incre- Accumu- Incre- Instant Design
Time Distri- mental lated lated mental lated mental Total Hydro- Hydro-
bution Rainfall Rainfall Runoff Runoff Runoff Runoff Runoff graph graph
(min.) (% of Pt) (in.) (in.) (in.) (in.) (in.) (in.) (in.) (CFS) (CFS)
10
0.0040
0.0136
0.0136
0.0000
0.0000
0.0000
0.0000
0.0000
0.00
0.00
20
0.0040
0.0136
0.0272
0.0000
0.0000
0.0000
0.0000
0.0000
0.00
0.00
30
0.0040
0.0136
0.0408
0.0000
0.0000
0.0000
0.0000
0.0000
0.00
0.00
40
0.0040
0.0136
0.0544
0.0000
0.0000
0.0008
0.0008
0.0001
0.00
0.00
50
0.0040
0.0136
0.0680
0.0000
0.0000
0.0032
0.0023
0.0003
0.00.
0.00
60
0.0040
0.0136
0.0816
0.0000
0.0000
0.0068
0.0036
0.0005
0.01
0.00
70
0.0040
0.0136
0.0952
0.0000
0.0000
0.0114
0.0047
0.0007
0.01
0.01
80
0.0040
0.0136
0.1088
0.0000
0.0000
0.0170
0.0055
0.0008
0.01
0.01
90
0.0040
0.0136
0.1224
0.0000
0.0000
0.0233
0.0063
0.0009
0.01
0.01
100
0.0040
0.0136
0.1360
0.0000
0.0000
0.0303
0.0070
0.0010
0.01
0.01
110
0.0050
0.0170
0.1530
0.0000
0.0000
0.0398
0.0095
0.0014
0.01
0.01
120
0.0050
0.0170
0.1700
0.0000
0.0000
0.0501
0.0103
0.0015
0.01
0.01
130
0.0050
0.0170
0.1870
0.0000
0.0000
0.0610
0.0109
0.0016
0.02
0.02
140
0.0050
0.0170
0.2040
0.0000
0.0000
0.0725
0.0115
0.0016
0.02
0.02
150
0.0050
0.0170
0.2210
0.0000
0.0000
0.0845
0.0120
0.0017
0.02
0.02
160
0.0050
0.0170
0.2380
0.0002
0.0002
0.0969
0.0124
0.0020
0.02
0.02
170
0.0060
0.0204
0.2584
0.0011
0.0009
0.1123
0.0154
0.0030
0.03
0.03
180
0.0060
0.0204
0.2788
0.0027
0.0016
0.1281
0.0158
0.0036
0.04
0.04
190
0.0060
0.0204
0.2992
0.0050
0.0022
0.1444
0.0162
0.0042
0.04
0.04
200
0.0060
0.0204
0.3196
0.0078
0.0029
0.1610
0.0166
0.0048
0.05
0.05
210
0.0060
0.0204
0.3400
0.0113
0.0034
0.1779
0.0169
0.0054
0.05
0.05
220
0.0060
0.0204
0.3604
0.0153
0.0040
0.1950
0.0172
0.0059
0.06
0.06
230
0.0070
0.0238
0.3842
0.0206
0.0053
0.2154
0.0203
0.0075
0.08
0.07
240
0.0070
0.0238
0.4080
0.0266
0.0060
0.2360
0.0206
0.0081
0.08
0.08
250
0.0070
0.0238
0.4318
0.0333
0.0066
0.2569
0.0209
0.0087
0.09
0.09
260
0.0070
0.0238
0.4556
0.0405
0.0073
0.2780
0.0211
0.0092
0.09
0.09
270
0.0070
0.0238
0.4794
0.0483
0.0078
0.2993
0.0213
0.0097
0.10
0.10
280
0.0070
0.0238
0.5032
0.0567
0.0084
0.3208
0.0215
0.0102
0.10
0.10
290
0.0082
0.0279
0.5311
0.0672
0.0105
0.3462
0.0254
0.0126
0.13
0.12
300
0.0082
0.0279
0.5590
0.0783
0.0111
0.3717
0.0256
0.0132
0.13
0.13
310
0.0082
0.0279
0.5868
0.0901
0.0118
0.3975
0.0257
0.0138
0.14
0.14
320
0.0082
0.0279
0.6147
0.1025
0.0124
0.4234
0.0259
0.0143
0.15
0.14
330
0.0082
0.0279
0.6426
0.1154
0.0129
0.4494
0.0260
0.0148
0.15
0.15
340
0.0082
0.0279
0.6705
0.1289
0.0135
0.4755
0.0262
0.0153
0.16
0.15
D:\DAVE\STORM\25SITPST.XLS 6/29/90 @ 9:12 AM Page 4(O of S l
N.G. Jacobson Associates, Inc.
H
1
350
0.0095
0.0323
0.7028
0.1451
0.0162
0.5060
0.0304
0.0183
0.19
0.17
360
0.0095
0.0323
0.7351
0.1620
0.0169
0.5365
0.0306
0.0188
0.19
0.19
370
0.0095
0.0323
0.7674
0.1794
0.0175
0.5672
0.0307
0.0194
0.20
0.20
380
0.0095
0.0323
0.7997
0.1975
0.0180
0.5980
0.0308
0.0199
0.20
0.20
390
0.0095
0.0323
0.8320
0.2161
0.0186
0.6289
0.0309
0.0203
0.21
0.21
400
0.0095
0.0323
0.8643
0.2351
0.0191
0.6599
0.0310
0.0208
0.21
0.21
410
0.0133
0.0452
0.9095
0.2627
0.0275
0.7034
0.0435
0.0298
0.30
0.27
420
0.0133
0.0452
0.9547
0.2910
0.0284
0.7471
0.0436
0.0306
0.31
0.32
430
0.0133
0.0452
0.9999
0.3202
0.0292
0.7908
0.0438
0.0313
0.32
0.32
440
0.0180
0.0612
1.0611
0.3609
0.0407
0.8503
0.0594
0.0433
0.44
0.40
450
0.0180
0.0612
1.1223
0.4028
0.0419
0.9098
0.0596
0.0444
0.45
0.46
460
0.0340
0.1156
1.2379
0.4851
0.0822
1.0228
0.1129
0.0866
0.89
0.71
470
0.0540
0.1836
1.4215
0.6226
0.1375
1.2029
0.1802
0.1435
1.47
1.27
480
0.0270
0.0918
1.5133
0.6939
0.0714
1.2933
0.0904
0.0741
0.76
1.08
490
0.0180
0.0612
1.5745
0.7424
0.0484
1.3536
0.0603
0.0501
0.51
0.54
500
0.0134
0.0456
1.6201
0.7788
0.0365
1.3986
0.0449
0.0377
0.39
0.43
510
0.0134
0.0456
1.6657
0.8156
0.0368
1.4435
0.0450
0.0379
0.39
0.38
520
0.0134
0.0456
1.7112
0.8527
0.0371
1.4885
0.0450
0.0382
0.39
0.39
530
0.0088
0.0299
1.7411
0.8772
0.0245
1.5181
0.0296
0.0252
0.26
0.31
540
0.0088
0.0299
1.7711
0.9019
0.0246
1.5477
0.0296
0.0253
0.26
0.25
550
0.0088
0.0299
1.8010
0.9266
0.0248
1.5773
0.0296
0.0254
0.26
0.26
560
0.0088
0.0299
1.8309
0.9515
0.0249
1.6069
0.0296
0.0255
0.26
0.26
570
0.0088
0.0299
1.8608
0.9765
0.0250
1.6365
0.0296
0.0256
0.26
0.26
580
0.0088
0.0299
1.8907
1.0016
0.0251
1.6661
0.0296
0.0257
0.26
0.26
590
0.0088
0.0299
1.9207
1.0267
0.0252
1.6957
0.0296
0.0258
0.26
0.26
600
0.0088
0.0299
1.9506
1.0520
0.0253
1.7254
0.0296
0.0259
0.26
0.26
610
0. m
0.0299
1.9805
1.0774
0.0254
1.7550
0.0296
0.0260
0.27
0.27
620
0.0088
0.0299
2.0104
1.1029
0.0255
1.7847
0.0297
0.0261
0.27
0.27
630
0.0088
0.0299
2.0403
1.1285
0.0256
1.8143
0.0297
0.0262
0.27
0.27
640
0.0088
0.0299
2.0703
1.1541
0.0257
1.8440
0.0297
0.0262
0.27
0.27
650
0.0072
0.0245
2.0947
1.1752
0.0211
1.8683
0.0243
0.0215
0.22
0.24
660
0.0072
0.0245
2.1192
1.1963
0.0211
1.8926
0.0243
0.0216
0.22
0.22
670
0.0072
0.0245
2.1437
1.2175
0.0212
1.9169
0.0243
0.0216
0.22
0.22
680
0.0072
0.0245
2.1682
1.2387
0.0212
1.9411
0.0243
0.0217
0.22
0.22
690
0.0072
0.0245
2.1927
1.2600
0.0213
1.9654
0.0243
0.0217
0.22
0.22
700
0.0072
0.0245
2.2171
1.2813
0.0213
1.9897
0.0243
0.0217
0.22
0.22
710
0.0072
0.0245
2.2416
1.3027
0.0214
2.0140
0.0243
0.0218
0.22
0.22
720
0.0072
0.0245
2.2661
1.3241
0.0214
2.0383
0.0243
0.0218
0.22
0.22
730
0.0072
0.0245
2.2906
1.3455
0.0215
2.0627
0.0243
0.0219
0.22
0.22
740
0.0072
0.0245
2.3151
1.3671
0.0215
2.0870
0.0243
0.0219
0.22
0.22
750
0.0072
0.0245
2.3395
1.3886
0.0216
2.1113
0.0243
0.0219
0.22
0.22
760
0.0072
0.0245
2.3640
1.4102
0.0216
2.1356
0.0243
0.0220
0.22
0.22
770
0.0057
0.0194
2.3834
1.4273
0.0171
2.1549
0.0193
0.0174
0.18
0.20
780
0.0057
0.0194
2.4028
1.4445
0.0172
2.1741
0.0193
0.0175
0.18
0.17
790
0.0057
0.0194
2.4222
1.4617
0.0172
2.1934
0.0193
0.0175
0.18
0.18
800
0.0057
0.0194
2.4415
1.4789
0.0172
2.2126
0.0193
0.0175
0.18
0.18
810
0.0057
0.0194
2.4609
1.4961
0.0172
2.2319
0.0193
0.0175
0.18
0.18
820
0.0057
0.0194
2.4803
1.5134
0.0173
2.2512
0.0193
0.0175
0.18
0.18
830
0.0057
0.0194
2.4997
1.5307
0.0173
2.2704
0.0193
0.0176
0.18
0.18
840
0.0057
0.0194
2.5191
1.5480
0.0173
2.2897
0.0193
0.0176
0.18
0.18
850
0.0057
0.0194
2.5384
1.5653
0.0173
2.3090
0.0193
0.0176
0.18
0.18
860
0.0057
0.0194
2.5578
1.5827
0.0174
2.3282
0.0193
0.0176
0.18
0.18
870
0.0057
0.0194
2.5772
1.6001
0.0174
2.3475
0.0193
0.0176
0.18
0.18
880
0.0057
0.0194
2.5966
1.6175
0.0174
2.3668
0.0193
0.0177
0.18
0.18
890
0.0050
0.0170
2.6136
1.6327
0.0153
2.3837
0.0169
0.0155
0.16
0.17
900
0.0050
0.0170
2.6306
1.6480
0.0153
2.4006
0.0169
0.0155
0.16
0.16
910
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0.0170
2.6476
1.6633
0.0153
2.4175
0.0169
0.0155
0.16
0.16
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0.0170
2.6646
1.6787
0.0153
2.4344
0.0169
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2.6816
1.6940
0.0153
2.4513
0.0169
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0.16
940
0.0050
0.0170
2.6986
1.7094
0.0154
2.4682
0.0169
0.0156
0.16
0.16
950
0.0050
0.0170
2.7156
1.7248
0.0154
2.4851
0.0169
0.0156
0.16
0.16
960
0.0050
0.0170
2.7326
1.7401
0.0154
2.5021
0.0169
0.0156
0.16
0.16
970
0.0050
0.0170
2.7496
1.7556
0.0154
2.5190
0.0169
0.0156
0.16
0.16
980
0.0050
0.0170
2.7666
1.7710
0.0154
2.5359
0.0169
0.0156
0.16
0.16
I
D:\DAVE\STORM\25SITPST.XLS 6/29/90 a 9:12 AM Page T- of S 1
N.G. Jacobson Associates, Inc.
'
990
0.0050
0.0170
2.7836
1.7864
0.0154
2.5528
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0.0156
0.16
0.16
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0.0050
0.0170
2.8006
1.8019
0.0155
2.5697
0.0169
0.0157
0.16
0.16
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0.0040
0.0136
2.8142
1.8142
0.0124
2.5833
0.0135
0.0125
0.13
0.14
1020
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0.0136
2.8278
1.8266
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0.0135
0.0125
0.13
0.13
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1030
0.0040
0.0136
2.8414
1.8390
0.0124
2.6103
0.0135
0.0126
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0.13
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0.0136
2.8550
1.8514
0.0124
2.6239
0.0135
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0.13
1050
0.0040
0.0136
2.8686
1.8638
0.0124
2.6374
0.0135
0.0126
0.13
0.13
1060
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0.0136
2.8822
1.8762
0.0124
2.6510
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0.13
0.13
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1070
0.0040
0.0136
2.8958
1.8886
0.0124
2.6645
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0.0126
0.13
0.13
1080
0.0040
0.0136
2.9094
1.9011
0.0124
2.6780
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0.0136
2.9230
1.9135
0.0124
2.6916
0.0135
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0.13
0.13
1100
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0.0136
2.9366
1.9260
0.0124
2.7051
0.0135
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0.13
0.13
'
1110
0.0040
0.0136
2.9502
1.9384
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2.7187
0.0135
0.0126
0.13
0.13
1120
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0.0136
2.9638
1.9509
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2.7322
0.0135
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0.13
0.13
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0.0136
2.9774
1.9634
0.0125
2.7457
0.0135
0.0126
0.13
0.13
1140
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0.0136
2.9910
1.9758
0.0125
2.7593
0.0135
0.0126
0.13
0.13
'
1150
0.0040
0.0136
3.0046
1.9883
0.0125
2.7728
0.0135
0.0126
0.13
0.13
1160
0.0040
0.0136
3.0182
2.0008
0.0125
2.7864
0.0135
0.0126
0.13
0.13
1170
0.0040
0.0136
3.0318
2.0133
0.0125
2.7999
0.0135
0.0127
0.13
0.13
1180
0.0040
0.0136
3.0454
2.0258
0.0125
2.8135
0.0135
0.0127
0.13
0.13
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1190
0.0040
0.0136
3.0590
2.0384
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2.8270
0.0135
0.0127
0.13
0.13
1200
0.0040
0.0136
3.0726
2.0509
0.0125
2.8406
0.0135
0.0127
0.13
0.13
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0.0040
0.0136
3.0862
2.0634
0.0125
2.8541
0.0135
0.0127
0.13
0.13
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0.0136
3.0998
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0.0127
0.13
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1230
0.0040
0.0136
3.1134
2.0885
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2.8812
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0.0127
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0.13
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0.0040
0.0136
3.1270
2.1011
0.0126
2.8947
0.0135
0.0127
0.13
0.13
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0.0040
0.0136
3.1406
2.1136
0.0126
2.9083
0.0135
0.0127
0.13
0.13
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0.0136
3.1542
2.1262
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2.9218
0.0135
0.0127
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1270
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0.0136
3.1814
2.1514
0.0126
2.9489
0.0135
0.0127
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0:13
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0.0136
3.1950
2.1640
0.0126
2.9625
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3.2358
2.2018
0.0126
3.0031
0.0136
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3.2494
2.2144
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3.0167
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3.2630
2.2270
0.0126
3.0302
0.0136
0.0128
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0.13
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0.0136
3.2766
2.2396
0.0126
3.0438
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0.0128
0.13
0.13
1360
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0.0136
3.2902
2.2523
0.0126
3.0573
0.0136
0.0128
0.13
0.13
1370
0.0040
0.0136
3.3038
2.2649
0.0126
3.0709
0.0136
0.0128
0.13
0.13
1380
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0.0136
3.3174
2.2776
0.0126
3.0844
0.0136
0.0128
0.13
0.13
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1390
0.0040
0.0136
3.3310
2.2902
0.0127
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0.13
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0.0040
0.0136
3.3446
2.3029
0.0127
3.1116
0.0136
0.0128
0.13
0.13
1410
0.0040
0.0136
3.3582
2.3155
0.0127
3.1251
0.0136
0.0128
0.13
0.13
1420
0.0040
0.0136
3.3718
2.3282
0.0127
3.1387
0.0136
0.0128
0.13
0.13
1430
0.0040
0.0136
3.3854
2.3409
0.0127
3.1522
0.0136
0.0128
0.13
0.13
1440
0.0040
0.0136
3.3990
2.3536
0.0127
3.1658
0.0136
0.0128
0.13
0.13
F-
L
ID:\DAVE\STORM\25SITPST.XLS 6/29/90 a 9:12 AM Page 4 S of SI
N.G. Jacobson Associates, Inc.
100 Year Storm - Proposed Site Conditions (Surface Parking & Site Only)
Santa Barbara Urban Hydrograph (SBUH); Hydrologic model of drainage features 6/29/90
PROJECT: Valley 'Medical.Center Phase. II Parking Garage & Improvements
AREA = 1.69 Acres
Pt = 3.9 inches (Total rainfall for 100 year - 24 hour event)
dt = 10 min.
Tc = 3.27 min. (Sheet flow => storm system => existing discharge outlet)
w = 0.6046 (Routing Constant, w = dt/(2Tc + dt))
PERVIOUS Parcel: IMPERVIOUS Parcel:
AREA = 1.45 Acres AREA = 0.24 Acres
CN = 90 CN = 98
S = 1.11 S = 0.20
0.2S = 0.22 0.2S = 0.04 Peak Discharge = 1.53 CFS
Rainfall Incre- Accumu- Accumu- Incre- Accumu- Incre- Instant Design
Time Distri- mental lated lated mental lated mental Total Hydro- Hydro-
bution Rainfall Rainfall Runoff Runoff Runoff Runoff Runoff graph graph
(min.) (% of Pt) (in.) (in.) (in.) (in.) (in.) (in.) (in.) (CFS) (CFS)
10
0.0040
0.0156
0.0156
0.0000
0.0000
0.0000
0.0000
0.0000
0.00
0.00
20
0.0040
0.0156
0.0312
0.0000
0.0000
0.0000
0.0000
0.0000
0.00
0.00
30
0.0040
0.0156
0.0468
0.0000
0.0000
0.0002
0.0002
0.0000
0.00
0.00
40
0.0040
0.0156
0.0624
0.0000
0.0000
0.0021
0.0019
0.0003
0.00
0.00
50
0.0040
0.0156
0.0780
0.0000
0.0000
0.0057
0.0037
0.0005
0.01
0.00
60
0.0040
0.0156
0.0936
0.0000
0.0000
0.0108
0.0051
0.0007
0.01
0.01
70
0.0040
0.0156
0.1092
0.0000
0.0000
0.0172
0.0063
0.0009
0.01
0.01
80
0.0040
0.0156
0.1248
0.0000
0.0000
0.0245
0.0073
0.0010
0.01
0.01
90
0.0040
0.0156
0.1404
0.0000
0.0000
0.0327
0.0082
0.0012
0.01
0.01
100
0.0040
0.0156
0.1560
0.0000
0.0000
0.0416
0.0089
0.0013
0.01
0.01
110
0.0050
0.0195
0.1755
0.0000
0.0000
0.0535
0.0120
0.0017
0.02
0.02
120
0.0050
0.0195
0.1950
0.0000
0.0000
0.0664
0.0128
0.0018
0.02
0.02
130
0.0050
0.0195
0.2145
0.0000
0.0000
0.0799
0.0135
0.0019
0.02
0.02
140
0.0050
0.0195
0.2340
0.0001
0.0001
0.0939
0.0141
0.0021
0.02
0.02
150
0.0050
0.0195
0.2535
0.0009
0.0007
0.1085
0.0146
0.0027
0.03
0.03
160
0.0050
0.0195
0.2730
0.0022
0.0014
0.1236
0.0150
0.0033
0.03
0.03
170
0.0060
0.0234
0.2964
0.0046
0.0024
0.1421
0.0185
0.0047
0.05
0.04
180
0.0060
0.0234
0.3198
0.0079
0.0032
0.1611
0.0190
0.0055
0.06
0.05
190
0.0060
0.0234
0.3432
0.0119
0.0040
0.1805
0.0194
0.0062
0.06
0.06
200
0.0060
0.0234
0.3666
0.0166
0.0047
0.2003
0.0198
0.0069
0.07
0.07
210
0.0060
0.0234
0.3900
0.0220
0.0054
0.2204
0.0201
0.0075
0.08
0.07
220
0.0060
0.0234
0.4134
0.0281
0.0061
0.2407
0.0203
0.0081
0.08
0.08
230
0.0070
0.0273
0.4407
0.0359
0.0078
0.2648
0.0240
0.0101
0.10
0.10
240
0.0070
0.0273
0.4680
0.0445
0.0086
0.2891
0.0243
0.0108
0.11
0.11
250
0.0070
0.0273
0.4953
0.0539
0.0094
0.3136
0.0246
0.0115
0.12
0.12
260
0.0070
0.0273
0.5226
0.0639
0.0100
0.3384
0.0248
0.0121
0.12
0.12
270
0.0070
0.0273
0.5499
0.0746
0.0107
0.3634
0.0250
0.0127
0.13
0.13
280
0.0070
0.0273
0.5772
0.0859
0.0113
0.3885
0.0251
0.0133
0.14
0.13
290
0.0082
0.0320
0.6092
0.1000
0.0140
0.4182
0.0297
0.0162
0.17
0.15
300
0.0082
0.0320
0.6412
0.1147
0.0148
0.4480
0.0298
0.0169
0.17
0.17
310
0.0082
0.0320
0.6731
0.1302
0.0155
0.4780
0.0300
0.0175
0.18
0.18
320
0.0082
0.0320
0.7051
0.1463
0.0161
0.5082
0.0301
0.0181
0.19
0.18
330
0.0082
0.0320
0.7371
0.1630
0.0167
0.5385
0.0303
0.0187
0.19
0.19
340
0.0082
0.0320
0.7691
0.1804
0.0173
0.5689
0.0304
0.0192
0.20
0.19
D:\DAVE\STORM\100STPST.XLS
6/29/90 a 9:14 AM
Page 4a of 5 11
N.G. Jacobson Associates, Inc.
350
0.0095
0.0371
0.8061
0.2011
0.0208
0.6042
0.0353
0.0228
0.23
0.22
360
0.0095
0.0371
0.8432
0.2226
0.0215
0.6397
0.0355
0.0235
0.24
0.24
370
0.0095
0.0371
0.8802
0.2447
0.0221
0.6752
0.0356
0.0240
0.25
0.24
380
0.0095
0.0371
0.9173
0.2675
0.0227
0.7109
0.0357
0.0246
0.25
0.25
390
0.0095
0.0371
0.9543
0.2908
0.0233
0.7467
0.0358
0.0251
0.26
0.25
400
0.0095
0.0371
0.9914
0.3146
0.0239
0.7826
0.0359
0.0256
0.26
0.26
410
0.0133
0.0519
1.0433
0.3489
0.0342
0.8329
0.0503
0.0365
0.37
0.33
420
0.0133
0.0519
1.0951
0.3840
0.0352
0.8833
0.0504
0.0373
0.38
0.39
430
0.0133
0.0519
1.1470
0.4201
0.0360
0.9339
0.0506
0.0381
0.39
0.39
440
0.0180
0.0702
1.2172
0.4700
0.0500
1.0025
0.0686
0.0526
0.54
0.48
450
0.0180
0.0702
1.2874
0.5213
0.0513
1.0712
0.0687
0.0538
0.55
0.56
460
0.0340
0.1326
1.4200
0.6214
0.1000
1.2014
0.1302
0.1043
1.07
0.86
470
0.0540
0.2106
1.6306
0.7873
0.1659
1.4089
0.2075
0.1718
1.76
1.53
480
0.0270
0.1053
1.7359
0.8729
0.0856
1.5129
0.1040
0.0883
0.90
1.29
490
0.0180
0.0702
1.8061
0.9309
0.0579
1.5823
0.0694
0.0596
0.61
0.64
500
0.0134
0.0523
1.8584
0.9744
0.0435
1.6341
0.0517
0.0447
0.46
0.51
510
0.0134
0.0523
1.9106
1.0183
0.0439
1.6858
0.0517
0.0450
0.46
0.45
520
0.0134
0.0523
1.9629
1.0625
0.0442
1.7376
0.0518
0.0453
0.46
0.46
530
0.0088
0.0343
1.9972
1.0916
0.0292
1.7716
0.0340
0.0299
0.31
0.37
540
0. m
0.0343
2.0315
1.1209
0.0293
1.8056
0.0340
0.0300
0.31
0.29
550
0.0088
0.0343
2.0658
1.1503
0.0294
1.8396
0.0340
0.0301
0.31
0.31
560
0.0088
0.0343
2.1002
1.1798
0.0295
1.8737
0.0340
0.0302
0.31
0.31
570
0.0088
0.0343
2.1345
1.2095
0.0296
1.9077
0.0340
0.0303
0.31
0.31
580
0.0088
0.0343
2.1688
1.2392
0.0297
1.9418
0.0341
0.0303
0.31
0.31
590
0.0088
0.0343
2.2031
1.2691
0.0298
1.9758
0.0341
0.0304
0.31
0.31
600
0.0088
0.0343
2.2374
1.2990
0.0299
2.0099
0.0341
0.0305
0.31
0.31
610
0.0088
0.0343
2.2718
1.3290
0.0300
2.0440
0.0341
0.0306
0.31
0.31
620
0.0088
0.0343
2.3061
1.3591
0.0301
2.0780
0.0341
0.0307
0.31
0.31
630
0.0088
0.0343
2.3404
1.3894
0.0302
2.1121
0.0341
0.0308
0.31
0.31
640
0.0088
0.0343
2.3747
1.4197
0.0303
2.1462
0.0341
0.0308
0.32
0.32
650
0.0072
0.0281
2.4028
1.4445
0.0249
2.1741
0.0279
0.0253
0.26
0.28
660
0.0072
0.0281
2.4309
1.4694
0.0249
2.2020
0.0279
0.0253
0.26
0.25
670
0.0072
0.0281
2.4590
1.4944
0.0250
2.2299
0.0279
0.0254
0.26
0.26
680
0.0072
0.0281
2.4870
1.5194
0.0250
2.2578
0.0279
0.0254
0.26
0.26
690
0.0072
0.0281
2.5151
1.5445
0.0251
2.2858
0.0279
0.0255
0.26
0.26
700
0.0072
0.0281
2.5432
1.5696
0.0251
2.3137
0.0279
0.0255
0.26
0.26
710
0.0072
0.0281
2.5713
1.5947
0.0252
2.3416
0.0279
0.0256
0.26
0.26
720
0.0072
0.0281
2.5994
1.6199
0.0252
2.3695
0.0279
0.0256
0.26
0.26
730
0.0072
0.0281
2.6274
1.6452
0.0253
2.3975
0.0279
0.0256
0.26
0.26
740
0.0072
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