For which one of the following purposes is the double mass curve used

1.	For which one of the following purposes is the double mass curve used ?
A.	Checking on the consistency of precipitation records
B.	Prediction of annual precipitation
C.	Defining which periods of storm should be analyzed to obtain the maximum useful information from storm rainfall records
D.	For estimating the capacity of a reservoir.
Answer» B. Prediction of annual precipitation

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For which one of the following purposes is the double mass curve used ?

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