GATE CE 2014 Set 1 — Question 29
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Water Resources Engineering → Hydrographs & Groundwater → Flood Routing
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Question
In reservoirs with an uncontrolled spillway, the peak of the plotted outflow hydrograph
Correct answer
(B) lies on the recession limb of the plotted inflow hydrograph
Solution
In reservoir routing through an uncontrolled spillway, the peak of the outflow hydrograph occurs at the point where the inflow rate equals the outflow rate (). This intersection point always lies on the recession limb of the inflow hydrograph because the reservoir storage (and thus outflow) continues to increase as long as the inflow rate is greater than the outflow rate.
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