Question: A rainstorm with a total depth of 40 mm and duration of 4 hours on small watershed of 6 Km was distributed in time

A rainstorm with a total depth of 40 mm and duration of 4 hours on small watershed of 6 Km was distributed in time and is shown in the following table. Analyses of the runoff data show that this rain produces a runoff volume of 78000 m. Compute the O-index for this storm? Time (hours) 1 2 3 4 Rainfall Depth (mm) 3 9 15 13

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