GATE CE 2020 Set 2 — Question 24
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Water Resources Engineering → Hydrographs & Groundwater → Hydrograph Analysis
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Question
A triangular direct runoff hydrograph due to a storm has a time base of 90 hours. The peak flow of occurs at 20 hours from the start of the storm. The area of catchment is . The rainfall excess of the storm (in cm), is
Correct answer
(B) 3.24
Solution
1.Calculate the volume of runoff ():
The volume of runoff is the area under the Direct Runoff Hydrograph (DRH).2.Calculate rainfall excess ():
Rainfall excess is the volume of runoff divided by the catchment area.3.Convert to cm:
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