A 24-hour storm occurred over a catchment of 2 km2 area and the total rainfall observed was 10 cm. An infiltration capacity curve prepared had the initial infiltration capacity of 1 cm/hr and attained a constant value of 0.3 cm/hr after 15 hours of rainfall with a Horton’s constant k = 5 hr–1. An IMD pan installed in the catchment indicated a decrease of 0.6 cm in the water level (after allowing for rainfall) during 24 hours of its operation. Other losses were found to be negligible. Determine the runoff volume (in cubic meter) from the catchment. Assume a pan coefficient of 0.75.
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