Mean precipitation over an area is best obtained from gauged amounts b

1.	Mean precipitation over an area is best obtained from gauged amounts by
A.	arithmetic mean method
B.	Thiessen method
C.	linearly interpolated isohyetal method
D.	orographically weighted isohyetal method
Answer» D. orographically weighted isohyetal method

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Mean precipitation over an area is best obtained from gauged amounts by

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