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2. A basin has an area of 750 km2. 40 % of it is impervious due to either rock outcrop or urbanization. 30 % is thick forest. The remaining is agricultural land. The indices for these portions may be taken as 0, 15 and 7.5 mm/h. An 8 hr storm produced rainfall intensities of 6, 9,20, 16, 4, 14, 12 and 2 mm/h in successive one hour intervals. Determine the corresponding runoff depth and runoff volume in million m3

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