The runoff coefficients (C) for pre- and post-development conditions of a 46-acre watershed are 0.3 and 0.55, respectively. The pre- and post-development times of concentration are 45 and 30 min,...






The runoff coefficients (C) for pre- and post-development conditions of a 46-acre watershed are 0.3 and 0.55, respectively. The pre- and post-development times of concentration are 45 and 30 min, respectively. Assuming a 25-yr return period and the IDF curve of Figure 4-4, estimate the depth (in.) and volume (acre-ft) of detention storage required using the loss-of-naturalstorage method










Jan 09, 2022
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