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The area between the isohytes 0.45 m and 0.55 m is 100 Sq.km and between 0.55 m and 0.65 m is of 150 Sq.km. The average depth of annual precipitation over the above basin of 250 Sq.km will be
Correct Answer: C — 0.56 m
Explanation:
Concept: Isohyetal method: The isohyetal method is used to estimate the mean precipitation across an area by drawing lines of equal precipitation. The method uses topographic and other data to yield reliable estimates. Isohyets are contours of equal precipitation analogous to contour lines on a topographic map.