Compute the overland flow into a stream channel where the cross-section is shown on the following page. The rainfall intensity (RI) in mm/hr (in./hour) is given by
where b = 2,438 for RI in mm/hour (96, in./hour), d = 8.0, e = 0.73, and t is time in minutes. Use a 6-hour duration storm with dt = 5 minutes. Use an initial abstraction of 12.7 mm (0.5 in.) and a balanced triangular rainfall distribution. The soil and infiltration characteristics are listed as follows:
What is the maximum water depth and discharge rate at the channel?
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