Engineering, 30.03.2021 21:00 Jalyn6883

The surface of a 2-ha catchment is characterized by a runoff coefficient of 0.5, a Manning n for overland flow of 0.25, an average overland flow length of 60 m, and an average slope of 0.5%. The time of concentration can be calculated by the kinematic-wave equation. The drainage channel is to be sized for the peak runoff resulting from a 10-year rainfall event, and the 10-year IDF curve is given by 0.78 150 ( 8.96) i t
where i is the average rainfall intensity in cm/h and t is the duration in minutes. The minimum time of concentration is 5 minutes. Determine the peak runoff rate.

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The surface of a 2-ha catchment is characterized by a runoff coefficient of 0.5, a Manning n for ove...

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