A new reservoir has a capacity of 12 Mm3 and its catchment area is 400 km2. The annual sediment yield from this catchment is 0.1 ha.m/km2 and the trap efficiency can be assumed constant at 90%. The number of years it takes for the reservoir to lose 50% of its initial capacity is, nearly

A new reservoir has a capacity of 12 Mm3 and its catchment area is 400

1.	A new reservoir has a capacity of 12 Mm3 and its catchment area is 400 km2. The annual sediment yield from this catchment is 0.1 ha.m/km2 and the trap efficiency can be assumed constant at 90%. The number of years it takes for the reservoir to lose 50% of its initial capacity is, nearly
A.	177 years
B.	77 years
C.	17 years
D.	7 years
Answer» D. 7 years

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A new reservoir has a capacity of 12 Mm3 and its catchment area is 400 km2. The annual sediment yield from this catchment is 0.1 ha.m/km2 and the trap efficiency can be assumed constant at 90%. The number of years it takes for the reservoir to lose 50% of its initial capacity is, nearly

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