7.7.10 An 8-mi² watershed has a time of concentration of 1.0 h. Calculate a 10-minute unit hydrograph for this watershed
Posted: Wed May 04, 2022 9:37 am
- 7 7 10 An 8 Mi Watershed Has A Time Of Concentration Of 1 0 H Calculate A 10 Minute Unit Hydrograph For This Watershed 1 (11.85 KiB) Viewed 39 times
Determine the direct runoff hydrograph for a 20-minute storm having 0.6 in of excess rainfall in the first 10 minutes and 0.4 in in the second 10 minutes.
7.7.10 for the SCS synthetic unit hydrograph (figure 7.7.4a) using 8 mi2 and 1.25 hr time of concentration (not the textbook 1 hr time of concentration); the first step is to create the UH, the second is to apply it to the 20-minute storm
1.0 0.8 0.6 0.4 0.2 FIGURE 7.7.4 alap 2 1/Tp (a) 3 SIN F Excess rainfall 4p (h) Direct runoff 1.67T