Q. The optimum period of storage of river water considered to be about

A
5 - 10 days
B
10 - 14 days
C
14 - 20 days
D
20 - 25 days
Solution:

Reservoirs are generally used for water storage along a river course, for off-river water. The period of storage of river water considered to be about 10 – 14 days.

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