The following table gives the measured rainfall and surface runoff from a 65-acre watershed. Values given are averages over the time interval. Compute the accumulated storage (ft3) of water within the watershed. Plot on the same graph the inflow, outflow, and cumulative storage as a function of time.
Time (min) | Rainfall (inches) | Runoff (ft3/sec) |
0 | 0 | 0 |
10 | 0.07 | 2.1 |
20 | 0.15 | 9.5 |
30 | 0.21 | 18.9 |
40 | 0.16 | 37.3 |
50 | 0.09 | 48.8 |
60 | 0.05 | 52.6 |
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