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HomeMy WebLinkAboutL16062_Volume Verification _210625_signed.pdf Flow Frequency Analysis Time Series File:predev.tsf Project Location:Sea-Tac ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) Period 0.123 2 2/09/01 18:00 0.156 1 100.00 0.990 0.033 7 1/06/02 3:00 0.123 2 25.00 0.960 0.091 4 2/28/03 3:00 0.094 3 10.00 0.900 0.004 8 3/24/04 20:00 0.091 4 5.00 0.800 0.054 6 1/05/05 8:00 0.079 5 3.00 0.667 0.094 3 1/18/06 21:00 0.054 6 2.00 0.500 0.079 5 11/24/06 4:00 0.033 7 1.30 0.231 0.156 1 1/09/08 9:00 0.004 8 1.10 0.091 Computed Peaks 0.145 50.00 0.980 ½ 2-year: 0.027 2-year: 0.054 10-year 0.094 25-year: 0.123 Flow Frequency Analysis Time Series File:rdin.tsf Project Location:Sea-Tac ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) Period 0.327 6 2/09/01 2:00 0.661 1 100.00 0.990 0.268 8 1/05/02 16:00 0.426 2 25.00 0.960 0.393 3 2/27/03 7:00 0.393 3 10.00 0.900 0.293 7 8/26/04 2:00 0.352 4 5.00 0.800 0.352 4 10/28/04 16:00 0.348 5 3.00 0.667 0.348 5 1/18/06 16:00 0.327 6 2.00 0.500 0.426 2 10/26/06 0:00 0.293 7 1.30 0.231 0.661 1 1/09/08 6:00 0.268 8 1.10 0.091 Computed Peaks 0.583 50.00 0.980 Flow Frequency Analysis Time Series File:byp.tsf Project Location:Sea-Tac ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) Period 0.025 4 2/09/01 2:00 0.055 1 100.00 0.990 0.016 7 1/05/02 16:00 0.031 2 25.00 0.960 0.031 2 2/27/03 7:00 0.026 3 10.00 0.900 0.013 8 8/26/04 2:00 0.025 4 5.00 0.800 0.017 6 10/28/04 16:00 0.024 5 3.00 0.667 0.026 3 1/18/06 16:00 0.017 6 2.00 0.500 0.024 5 11/24/06 3:00 0.016 7 1.30 0.231 0.055 1 1/09/08 6:00 0.013 8 1.10 0.091 Computed Peaks 0.047 50.00 0.980 Retention/Detention Facility Type of Facility: Detention Vault Facility Length: 98.00 ft Facility Width: 46.00 ft Facility Area: 4508. sq. ft Effective Storage Depth: 5.50 ft Stage 0 Elevation: 0.00 ft Storage Volume: 24794. cu. ft Riser Head: 5.50 ft Riser Diameter: 12.00 inches Number of orifices: 2 Full Head Pipe Orifice # Height Diameter Discharge Diameter (ft) (in) (CFS) (in) 1 0.00 0.69 0.030 2 3.60 1.38 0.071 4.0 Top Notch Weir: None Outflow Rating Curve: None Stage Elevation Storage Discharge Percolation (ft) (ft) (cu. ft) (ac-ft) (cfs) (cfs) 0.00 0.00 0. 0.000 0.000 0.00 0.01 0.01 45. 0.001 0.002 0.00 0.02 0.02 90. 0.002 0.002 0.00 0.03 0.03 135. 0.003 0.002 0.00 0.04 0.04 180. 0.004 0.003 0.00 0.05 0.05 225. 0.005 0.003 0.00 0.06 0.06 271. 0.006 0.003 0.00 0.16 0.16 721. 0.017 0.005 0.00 0.26 0.26 1172. 0.027 0.007 0.00 0.36 0.36 1623. 0.037 0.008 0.00 0.46 0.46 2074. 0.048 0.009 0.00 0.56 0.56 2525. 0.058 0.010 0.00 0.66 0.66 2975. 0.068 0.010 0.00 0.76 0.76 3426. 0.079 0.011 0.00 0.86 0.86 3877. 0.089 0.012 0.00 0.96 0.96 4328. 0.099 0.013 0.00 1.06 1.06 4779. 0.110 0.013 0.00 1.16 1.16 5229. 0.120 0.014 0.00 1.26 1.26 5680. 0.130 0.014 0.00 1.36 1.36 6131. 0.141 0.015 0.00 1.46 1.46 6582. 0.151 0.015 0.00 1.56 1.56 7033. 0.161 0.016 0.00 1.66 1.66 7483. 0.172 0.017 0.00 1.76 1.76 7934. 0.182 0.017 0.00 1.86 1.86 8385. 0.192 0.017 0.00 1.96 1.96 8836. 0.203 0.018 0.00 2.06 2.06 9287. 0.213 0.018 0.00 2.16 2.16 9737. 0.224 0.019 0.00 2.26 2.26 10188. 0.234 0.019 0.00 2.36 2.36 10639. 0.244 0.020 0.00 2.46 2.46 11090. 0.255 0.020 0.00 2.56 2.56 11540. 0.265 0.021 0.00 2.66 2.66 11991. 0.275 0.021 0.00 2.76 2.76 12442. 0.286 0.021 0.00 2.86 2.86 12893. 0.296 0.022 0.00 2.96 2.96 13344. 0.306 0.022 0.00 3.06 3.06 13794. 0.317 0.022 0.00 3.16 3.16 14245. 0.327 0.023 0.00 3.26 3.26 14696. 0.337 0.023 0.00 3.36 3.36 15147. 0.348 0.024 0.00 3.46 3.46 15598. 0.358 0.024 0.00 3.56 3.56 16048. 0.368 0.024 0.00 3.60 3.60 16229. 0.373 0.024 0.00 3.61 3.61 16274. 0.374 0.025 0.00 3.63 3.63 16364. 0.376 0.026 0.00 3.64 3.64 16409. 0.377 0.028 0.00 3.66 3.66 16499. 0.379 0.031 0.00 3.67 3.67 16544. 0.380 0.034 0.00 3.69 3.69 16635. 0.382 0.039 0.00 3.70 3.70 16680. 0.383 0.041 0.00 3.71 3.71 16725. 0.384 0.042 0.00 3.81 3.81 17175. 0.394 0.049 0.00 3.91 3.91 17626. 0.405 0.054 0.00 4.01 4.01 18077. 0.415 0.059 0.00 4.11 4.11 18528. 0.425 0.063 0.00 4.21 4.21 18979. 0.436 0.067 0.00 4.31 4.31 19429. 0.446 0.070 0.00 4.41 4.41 19880. 0.456 0.073 0.00 4.51 4.51 20331. 0.467 0.076 0.00 4.61 4.61 20782. 0.477 0.079 0.00 4.71 4.71 21233. 0.487 0.082 0.00 4.81 4.81 21683. 0.498 0.085 0.00 4.91 4.91 22134. 0.508 0.087 0.00 5.01 5.01 22585. 0.518 0.090 0.00 5.11 5.11 23036. 0.529 0.092 0.00 5.21 5.21 23487. 0.539 0.094 0.00 5.31 5.31 23937. 0.550 0.097 0.00 5.41 5.41 24388. 0.560 0.099 0.00 5.50 5.50 24794. 0.569 0.101 0.00 5.60 5.60 25245. 0.580 0.411 0.00 5.70 5.70 25696. 0.590 0.976 0.00 5.80 5.80 26146. 0.600 1.710 0.00 5.90 5.90 26597. 0.611 2.500 0.00 6.00 6.00 27048. 0.621 2.790 0.00 6.10 6.10 27499. 0.631 3.040 0.00 6.20 6.20 27950. 0.642 3.280 0.00 6.30 6.30 28400. 0.652 3.500 0.00 6.40 6.40 28851. 0.662 3.710 0.00 6.50 6.50 29302. 0.673 3.900 0.00 6.60 6.60 29753. 0.683 4.090 0.00 6.70 6.70 30204. 0.693 4.270 0.00 6.80 6.80 30654. 0.704 4.440 0.00 6.90 6.90 31105. 0.714 4.600 0.00 7.00 7.00 31556. 0.724 4.760 0.00 7.10 7.10 32007. 0.735 4.910 0.00 7.20 7.20 32458. 0.745 5.060 0.00 7.30 7.30 32908. 0.755 5.210 0.00 7.40 7.40 33359. 0.766 5.350 0.00 7.50 7.50 33810. 0.776 5.480 0.00 Hyd Inflow Outflow Peak Storage Stage Elev (Cu-Ft) (Ac-Ft) 1 0.66 0.10 5.43 5.43 24477. 0.562 2 0.33 0.09 5.11 5.11 23045. 0.529 3 0.39 0.08 4.63 4.63 20879. 0.479 4 0.43 0.07 4.32 4.32 19496. 0.448 5 0.35 0.02 3.60 3.60 16210. 0.372 6 0.27 0.02 3.02 3.02 13606. 0.312 7 0.35 0.02 3.13 3.13 14118. 0.324 8 0.29 0.02 1.96 1.96 8815. 0.202 Hyd R/D Facility Tributary Reservoir POC Outflow Outflow Inflow Inflow Target Calc 1 0.10 0.06 ******** ******* 0.13 2 0.09 0.02 ******** 0.12 0.11 3 0.08 0.03 ******** ******* 0.09 4 0.07 0.02 ******** ******* 0.08 5 0.02 0.03 ******** ******* 0.05 6 0.02 0.02 ******** ******* 0.03 7 0.02 0.02 ******** ******* 0.03 8 0.02 0.01 ******** ******* 0.03 ---------------------------------- Route Time Series through Facility Inflow Time Series File:rdin.tsf Outflow Time Series File:rdout POC Time Series File:dsout Inflow/Outflow Analysis Peak Inflow Discharge: 0.661 CFS at 6:00 on Jan 9 in Year 8 Peak Outflow Discharge: 0.099 CFS at 14:00 on Jan 9 in Year 8 Peak Reservoir Stage: 5.43 Ft Peak Reservoir Elev: 5.43 Ft Peak Reservoir Storage: 24477. Cu-Ft : 0.562 Ac-Ft Add Time Series:byp.tsf Peak Summed Discharge: 0.131 CFS at 9:00 on Jan 9 in Year 8 Point of Compliance File:dsout.tsf Flow Frequency Analysis Time Series File:rdout.tsf Project Location:Sea-Tac ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) (ft) Period 0.092 2 2/09/01 20:00 0.099 5.43 1 100.00 0.990 0.022 7 1/07/02 4:00 0.092 5.11 2 25.00 0.960 0.080 3 3/06/03 22:00 0.080 4.63 3 10.00 0.900 0.018 8 8/26/04 8:00 0.070 4.32 4 5.00 0.800 0.023 6 1/08/05 5:00 0.024 3.60 5 3.00 0.667 0.024 5 1/19/06 11:00 0.023 3.13 6 2.00 0.500 0.070 4 11/24/06 8:00 0.022 3.02 7 1.30 0.231 0.099 1 1/09/08 14:00 0.018 1.96 8 1.10 0.091 Computed Peaks 0.097 5.31 50.00 0.980 Flow Frequency Analysis Time Series File:dsout.tsf Project Location:Sea-Tac ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) Period 0.108 2 2/09/01 18:00 0.131 1 100.00 0.990 0.035 6 1/05/02 16:00 0.108 2 25.00 0.960 0.092 3 3/06/03 19:00 0.092 3 10.00 0.900 0.029 8 8/26/04 2:00 0.083 4 5.00 0.800 0.034 7 1/05/05 8:00 0.046 5 3.00 0.667 0.046 5 1/18/06 16:00 0.035 6 2.00 0.500 0.083 4 11/24/06 6:00 0.034 7 1.30 0.231 0.131 1 1/09/08 9:00 0.029 8 1.10 0.091 Computed Peaks 0.123 50.00 0.980 Flow Duration from Time Series File:rdout.tsf Cutoff Count Frequency CDF Exceedence_Probability CFS % % % 0.001 27823 45.373 45.373 54.627 0.546E+00 0.004 7745 12.630 58.004 41.996 0.420E+00 0.007 5022 8.190 66.194 33.806 0.338E+00 0.009 5211 8.498 74.692 25.308 0.253E+00 0.012 5484 8.943 83.635 16.365 0.164E+00 0.014 4090 6.670 90.305 9.695 0.970E-01 0.017 1688 2.753 93.058 6.942 0.694E-01 0.019 1966 3.206 96.264 3.736 0.374E-01 0.022 1173 1.913 98.177 1.823 0.182E-01 0.024 852 1.389 99.566 0.434 0.434E-02 0.027 31 0.051 99.617 0.383 0.383E-02 0.030 16 0.026 99.643 0.357 0.357E-02 0.032 10 0.016 99.659 0.341 0.341E-02 0.035 5 0.008 99.667 0.333 0.333E-02 0.037 10 0.016 99.684 0.316 0.316E-02 0.040 5 0.008 99.692 0.308 0.308E-02 0.042 12 0.020 99.711 0.289 0.289E-02 0.045 16 0.026 99.737 0.263 0.263E-02 0.048 17 0.028 99.765 0.235 0.235E-02 0.050 15 0.024 99.790 0.210 0.210E-02 0.053 14 0.023 99.812 0.188 0.188E-02 0.055 6 0.010 99.822 0.178 0.178E-02 0.058 8 0.013 99.835 0.165 0.165E-02 0.060 6 0.010 99.845 0.155 0.155E-02 0.063 9 0.015 99.860 0.140 0.140E-02 0.065 10 0.016 99.876 0.124 0.124E-02 0.068 11 0.018 99.894 0.106 0.106E-02 0.071 12 0.020 99.914 0.086 0.864E-03 0.073 6 0.010 99.923 0.077 0.766E-03 0.076 7 0.011 99.935 0.065 0.652E-03 0.078 10 0.016 99.951 0.049 0.489E-03 0.081 11 0.018 99.969 0.031 0.310E-03 0.083 4 0.007 99.976 0.024 0.245E-03 0.086 3 0.005 99.980 0.020 0.196E-03 0.088 4 0.007 99.987 0.013 0.130E-03 0.091 3 0.005 99.992 0.008 0.815E-04 Flow Duration from Time Series File:dsout.tsf Cutoff Count Frequency CDF Exceedence_Probability CFS % % % 0.002 27841 45.403 45.403 54.597 0.546E+00 0.005 8669 14.137 59.540 40.460 0.405E+00 0.008 5251 8.563 68.103 31.897 0.319E+00 0.011 6803 11.094 79.198 20.802 0.208E+00 0.014 4166 6.794 85.992 14.008 0.140E+00 0.017 3490 5.691 91.683 8.317 0.832E-01 0.020 2023 3.299 94.982 5.018 0.502E-01 0.023 1311 2.138 97.120 2.880 0.288E-01 0.026 926 1.510 98.630 1.370 0.137E-01 0.029 432 0.705 99.335 0.665 0.665E-02 0.032 106 0.173 99.507 0.492 0.492E-02 0.035 56 0.091 99.599 0.401 0.401E-02 0.038 20 0.033 99.631 0.369 0.369E-02 0.041 18 0.029 99.661 0.339 0.339E-02 0.044 11 0.018 99.679 0.321 0.321E-02 0.047 14 0.023 99.702 0.298 0.298E-02 0.050 21 0.034 99.736 0.264 0.264E-02 0.053 15 0.024 99.760 0.240 0.240E-02 0.056 15 0.024 99.785 0.215 0.215E-02 0.059 15 0.024 99.809 0.191 0.191E-02 0.062 8 0.013 99.822 0.178 0.178E-02 0.065 6 0.010 99.832 0.168 0.168E-02 0.068 7 0.011 99.843 0.157 0.157E-02 0.071 9 0.015 99.858 0.142 0.142E-02 0.074 12 0.020 99.878 0.122 0.122E-02 0.077 11 0.018 99.896 0.104 0.104E-02 0.080 9 0.015 99.910 0.090 0.897E-03 0.083 10 0.016 99.927 0.073 0.734E-03 0.086 8 0.013 99.940 0.060 0.603E-03 0.089 10 0.016 99.956 0.044 0.440E-03 0.092 9 0.015 99.971 0.029 0.294E-03 0.095 3 0.005 99.976 0.024 0.245E-03 0.098 3 0.005 99.980 0.020 0.196E-03 0.101 2 0.003 99.984 0.016 0.163E-03 0.104 6 0.010 99.993 0.007 0.652E-04 0.107 2 0.003 99.997 0.003 0.326E-04 Duration Comparison Anaylsis Base File: predev.tsf New File: dsout.tsf Cutoff Units: Discharge in CFS -----Fraction of Time----- ---------Check of Tolerance------- Cutoff Base New %Change Probability Base New %Change 0.027 | 0.96E-02 0.92E-02 -3.6 | 0.96E-02 0.027 0.027 -0.4 0.034 | 0.64E-02 0.41E-02 -35.9 | 0.64E-02 0.034 0.029 -15.4 0.042 | 0.50E-02 0.33E-02 -33.1 | 0.50E-02 0.042 0.032 -24.1 0.049 | 0.37E-02 0.28E-02 -25.6 | 0.37E-02 0.049 0.038 -22.8 0.056 | 0.29E-02 0.21E-02 -25.7 | 0.29E-02 0.056 0.048 -14.7 0.064 | 0.22E-02 0.17E-02 -22.1 | 0.22E-02 0.064 0.054 -14.4 0.071 | 0.15E-02 0.14E-02 -2.2 | 0.15E-02 0.071 0.070 -1.3 0.078 | 0.10E-02 0.99E-03 -1.6 | 0.10E-02 0.078 0.078 -0.3 0.086 | 0.62E-03 0.62E-03 0.0 | 0.62E-03 0.086 0.086 0.3 0.093 | 0.34E-03 0.28E-03 -19.0 | 0.34E-03 0.093 0.091 -2.2 0.100 | 0.21E-03 0.16E-03 -23.1 | 0.21E-03 0.100 0.098 -2.3 0.108 | 0.16E-03 0.16E-04 -90.0 | 0.16E-03 0.108 0.101 -6.0 0.115 | 0.98E-04 0.00E+00 -100.0 | 0.98E-04 0.115 0.103 -10.4 0.122 | 0.16E-04 0.00E+00 -100.0 | 0.16E-04 0.122 0.108 -11.6 Maximum positive excursion = 0.002 cfs ( 2.0%) occurring at 0.080 cfs on the Base Data:predev.tsf and at 0.081 cfs on the New Data:dsout.tsf Maximum negative excursion = 0.012 cfs (-26.7%) occurring at 0.047 cfs on the Base Data:predev.tsf and at 0.034 cfs on the New Data:dsout.tsf