The rainfall intensities of a 60-minute storm falling on a 10-acre basin were as follows:

a. Calculate the total rainfall depth in inches.

b. Calculate the φ index if the net rainfall (overland flow) from the basin was measured to be 1.5 in.

c. Calculate the volume of runoff from the basin.

Transcribed Image Text:

Time, min 15 30 45 60 Intensity, in./h 3.0 2.5 4.0 1.5