Question

Most accurate method of finding the average depth of rainfall over an catchment area

Answer 1

isohyteal method is the best to calculate
arithmetic mean is also good

Answer 2

The Isohyetal Method is considered as the most accurate method to calculate the average depth of rainfall over a catchment area.  

Explanation:

• This method requires an expert analyst because it is a complicated and difficult analysis method.  

• It calculates the mean precipitation by drawing lines in the areas of equal precipitation. This results in a contour known as isohyets.  

• The area within the isohyets is then calculated. This method uses information of the topography of the area and other necessary points to calculate the rainfall depth.

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