A 4-hour rainfall in a catchment of 250 km produces rainfall depths of 6.2 cm and 5.0 cm in successive 2-hour unit periods. Assuming the φ index of the soil to be 1.2 cm/hour, the run-off volume in ha-m will be

A 4-hour rainfall in a catchment of 250 km produces rainfall depths of

1.	A 4-hour rainfall in a catchment of 250 km produces rainfall depths of 6.2 cm and 5.0 cm in successive 2-hour unit periods. Assuming the φ index of the soil to be 1.2 cm/hour, the run-off volume in ha-m will be
A.	16
B.	22
C.	1600
D.	2200
Answer» D. 2200

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A 4-hour rainfall in a catchment of 250 km produces rainfall depths of 6.2 cm and 5.0 cm in successive 2-hour unit periods. Assuming the φ index of the soil to be 1.2 cm/hour, the run-off volume in ha-m will be

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