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Using the rational method, determine the amount of runoff that would occur for a paved parking...

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Civil Engineering

Using the rational method, determine the amount of runoff thatwould occur for a paved parking lot that is 100m * 50m and isuniformly sloped from one long edge to the other long edge at arate of 2%. The time of concentration for this parking is 4minutes. The five-year storm with duration of 4 minutes has anintensity of 10 mm/hr. The runoff coefficient for this parking lotis 0.80.Ø¢ [Q=0.166 CIA]
The runoff from part (a) is to be contained in a trapezoidaldrainage ditch with the following properties: side slope = 2mhorizontal run for every 1 m rise, width of invert = 2m,longitudinal slope = 0.005 m/m, and Manning's number = 0.08. If themaximum permittedآ depth of water is 100 mm, using Manning'sequation for open channel flow, determine if the ditch will be ableto accommodate the flow in part (a).

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