Measured total hourly discharge rates (in cfs) from a 2.48-mi2 drainage basin are tabulated below. The hydrograph was produced by a rainstorm having a uniform intensity of 2.60 in./hr starting at 9 a.m. and abruptly ending at 11 a.m. The base flow from 8 a.m. to 3 p.m. was a constant 100 cfs.
Time | 8 a.m. | 9 | 10 | 11 | 12 | 1 | 2 | 3 p.m. |
Discharge (cfs) | 100 | 100 | 300 | 450 | 300 | 150 | 100 | 100 |
(a) At what time did direct runoff begin?
(b) Determine the gross and net rain depths (in inches).
(c) Derive a 2-hr unit hydrograph for the basin by tabulating time in hours and discharge in cubic feet per second.
(d) Derive a 4-hr unit hydrograph for the basin.
(e) Derive a 1-hr unit hydrograph for the basin.
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.