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Trap efficiency of a storage reservoir is defined as the ratio of ___________________

(a) total annual sediment inflow to the reservoir capacity

(b) total sediment deposited in a given period to the total sediment inflow in that period

(c) total annual sediment deposited in the reservoir to the dead storage capacity of the reservoir

(d) reservoir capacity to the total annual sediment

I got this question during a job interview.

This intriguing question originated from Reservoir Capacity Determination Using Hydrograph and Mass-curve in section Reservoirs and Dam Reservoirs Planning of Irrigation Engineering

1 Answer

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by (106k points)
Right choice is (b) total sediment deposited in a given period to the total sediment inflow in that period

Explanation: Trap efficiency of a storage reservoir is defined as the ratio of the total sediment deposited in a given period to the total sediment inflow in that period. It can be defined as the percentage of sediment deposited in the reservoir in spite of taking precautionary control measures.

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