GATE CE 2017 Set 1 — Question 51
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Water Resources Engineering → Hydrographs & Groundwater → Unit Hydrographs
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Question
An effective rainfall of 2-hour duration produced a flood hydrograph peak of . The flood hydrograph has a base flow of . If the spatial average rainfall in the watershed for the duration of storm is and the average loss rate is , the peak of 2-hour unit hydrograph (in , up to one decimal place) is ___________
Correct answer
149 to 151
Solution
1.Find Peak of Direct Runoff Hydrograph (DRH):
Peak DRH = Peak Flood Hydrograph - Base FlowPeak DRH
2.Calculate Effective Rainfall (Runoff Depth, ):
Duration Total Rainfall
Loss rate
Total Loss
Effective Rainfall
3.Calculate Peak of Unit Hydrograph (UH):
Peak UH .Continue learning with Success Tracker
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