Irrigation Engineering
The useful storage is the volume of water stored in the reservoir between

minimum pool level and normal pool level
normal pool level and maximum pool level
river bed and minimum pool level
minimum pool level and maximum pool level

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Irrigation Engineering
Assertion A : To estimate the rainfall over a catchment, the number of raingauges required per unit area is large for hilly areas.Reason R : Rainfall gradient is steep.Select your correct answer according to the coding system given below :

Both A and R are true but R is not the correct explanation of A
A is false but R is true
Both A and R are true and R is the correct explanation of A
A is true but R is false

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