3. Referring to the right illustration (Fig. 2), water flows from RP to the inlet. The tributary area to the inlet is 20

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: 3 Referring To The Right Illustration Fig 2 Water Flows From Rp To The Inlet The Tributary Area To The Inlet Is 20 1 (33.81 KiB) Viewed 37 times

: 3 Referring To The Right Illustration Fig 2 Water Flows From Rp To The Inlet The Tributary Area To The Inlet Is 20 2 (148.44 KiB) Viewed 37 times

: 3 Referring To The Right Illustration Fig 2 Water Flows From Rp To The Inlet The Tributary Area To The Inlet Is 20 3 (61.83 KiB) Viewed 37 times

3. Referring to the right illustration (Fig. 2), water flows from RP to the inlet. The tributary area to the inlet is 20 acres. The runoff coefficient C=0.90. Assume the design frequency is 25 years. Estimate the flow rate using the Caltrans adjustment factor and Rational Method. (Hint: refer to HW#6 "IDF32.xls" file to obtain intensity and P₂ value). (2.5 points) RP Sheet Flow: L-200; S=0.01; n-0.015 Shallow Concentrated Flow: Short grass pasture; S=5%, L=500 Channel Flow: Rectagular Channel; 0.013; Bankfull depth=3'; width=8; S=0.02; L=400' Inlet Fig. 2
IDF32 Calculation and Plot EA: Location: Fresno 41 at Mckinley Lat: 36.769 degree Long: 119.72 degree Elev: 300 feet Table 1. Data from IDF32 Run RP(2) RP(10) RP(25) RP(50) RP(100) RP(1000) Slope 0.44 0.77 0.93 1.04 1.16 1.87 -0.596 Table 2. IDF Curve for Various Return Periods (Intensities-in/h) Duration (Hrs) Duration (min) RP(2) RP(10) RP(25) RP(50) RP(100) RP(1000) 0.0833 5 1.935 3.387 4.091 4.574 5.102 8.225 0.1667 10 1.280 2.240 2.705 3.025 3.374 5.440 0.25 15 1.005 1.759 2.125 2.376 2.650 4.272 0.5 30 0.665 1.164 1.406 1.572 1.753 2.827 1 60 0.440 0.770 0.930 1.040 1.160 1.870 120 0.291 0.509 0.615 0.688 0.767 1.237 240 0.193 0.337 0.407 0.455 0.508 0.818 480 0.127 0.223 0.269 0.301 0.336 0.542 960 0.084 0.148 0.178 0.199 0.222 0.358 1440 0.066 0.116 0.140 0.156 0.175 0.281 24862 16 06-432100 Mar
Rainfall Intensity (in/h) 4.5 4 3.5 3 2.5 2 1.5 1 0.5 0 0.0000 Intensity Curve for 25 Year Period 5.0000 10.0000 15.0000 20.0000 25.0000 30.0000 Duration (h)