The trap efficiency of a reservoir (as per Brune curve) depends primarily on:
Choose the correct answer
Annual inflow / reservoir capacity ratio (capacity-inflow ratio)
Reservoir depth
Dam height
Spillway capacity
Correct Answer
A. Annual inflow / reservoir capacity ratio (capacity-inflow ratio)
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Brune (1953) trap efficiency curve: TE (%) vs capacity-inflow (C/I) ratio. High C/I (large storage) = high trap efficiency (approaches 100%); low C/I (small/run-of-river) = low TE. This determines the rate of siltation and useful life of a reservoir.
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