GATE CE 2014 Set 2 — Question 29
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Water Resources Engineering → Hydrographs & Groundwater → Hydrograph Analysis
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Question
An isolated 3-h rainfall event on a small catchment produces a hydrograph peak and point of inflection on the falling limb of the hydrograph at 7 hours and 8.5 hours respectively, after the start of the rainfall. Assuming, no losses and no base flow contribution, the time of concentration (in hours) for this catchment is approximately
Correct answer
(D) 5.5
Solution
The time of concentration () in the context of a hydrograph is often defined as the time interval between the end of the effective rainfall and the point of inflection on the recession limb of the hydrograph.
Given:
Given:
- Duration of rainfall () = 3 hours
- Time of point of inflection from the start of rainfall = 8.5 hours
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