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A small water shed consists of 2 km2 of forest area (e 0.1), 1.2 km2 of cultivated area(c- 0.2) and I km' under grass cover (c 0.35). A water course

falls by 20 m in length of 2 km. The IDF relation for the area may be taken as i-8OT/(t+12) Estimate the peak rate of runoff for a 25 yr frequency,

Fig: 1