Recorded flow rates for a net rain of 1.92 inches in 12 hours are shown in the table. If the base flow is 375 cfs throughout the storm, determine the 12-hr unit hydrograph, and convert it to a 6-hr unit hydrograph. Then apply the 6-hr unit hydrograph to determine the total hydrograph (including 400 cfs base flow) for a 24-hr storm having four 6-hr blocks of net rain at rates of 0.7, 3.8, 10.8, and 1.8 in. per hour.
Time (hr) | Observed flow (cfs) |
0 | 375 |
6 | 825 |
12 | 2200 |
18 | 3650 |
24 | 3900 |
30 | 3200 |
36 | 2375 |
42 | 1725 |
48 | 1250 |
54 | 900 |
60 | 650 |
66 | 490 |
72 | 410 |
78 | 375 |
We need at least 10 more requests to produce the solution.
0 / 10 have requested this problem solution
The more requests, the faster the answer.