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Question

# During a 6-hour storm the rainfall intensity was 0.8 cm/hr on a catchment of area 8.6 km2. The measured runoff volume during this period was 2,56,000 m3. The total rainfall last due to infiltration, evaporation and transpiration in cm/hr is

A
0.80
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B
0.304
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C
0.496
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D
Sufficient information not available
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Solution

## The correct option is B 0.304Rainfall depth=0.8×6 =4.8 cm Rainfall volume=4.8100×8.6×106 =412800 m3 Total volume loss in infiltration, evaporation & transpiration =412800−256000 =156800 m3 Total rainfall loss in cm/hr =156800×1008.6×106×6 =0.304 cm/hr

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