Question: If the gross rainfall of Problem 28 falls over a watershed with area of 1600 acres, find the volume that was left to infiltration (assume

If the gross rainfall of Problem 28 falls over a watershed with area of 1600 acres, find the volume that was left to infiltration (assume evaporation can be neglected) based on the volume under the hydrograph.
In problem 28
If the gross rainfall of Problem 28 falls over a

Time (min) 0 15 30 45 60 75 90 105 120 135 P (in.) Time (hr) 1 2 3 Q (cfs) 0 0.2 0.61.1 1.5 182.02.2 2.3 25 7 10 12 100 200 500 80700 550 50 250 50 100 75 0

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