The 2-hr unit hydrograph for a basin is given by the following table:
Time (hr) | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
Q (cfs) | 0 | 60 | 200 | 300 | 200 | 120 | 60 | 30 | 10 | 0 |
(a) Determine the hourly discharge values (in cfs) from the basin for a net rain of 5 in./hr and a rainfall duration of 2 hr.
(b) Determine the direct runoff (in inches) for the storm of part (a). What is the direct runoff for a net rain of 0.5 in./hr and a duration of 2 hr?
(c) Rain falls on the basin at a rate of 4.5 in./hr for a 2-hr period and abruptly increases to a rate of 6.5 in./hr for a second 2-hr period. Convert these actual intensities to net rain intensities using a ϕ index of 0.5 in./hr. Construct a table that properly lags and amplifies the 2-hr unit hydrograph, and determine the hourly ordinates (in cfs) of direct runoff for the storm. The derived direct runoff hydrograph should begin and end with zero discharge values.
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.