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
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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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