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The Gross Command Area for a distributary is 8000 hectares 80% of which is culturable irrigable. The intensity of irrigation for Rabi season is 50% and the average duty at the head of the distributary is 2000 hectares/cumec. Determine the discharge required at the head of the distributary.

The Gross Command Area for a distributary is 8000 hectares 80% of which is culturable irrigable. The intensity of irrigation for Rabi season is 50% and the average duty at the head of the distributary is 2000 hectares/cumec. Determine the discharge required at the head of the distributary. Correct Answer 1.60 cumec

Cultivable Command Area CCA = 8000 x 80/100 = 6400 hectares The area to be irrigated = CCA x Intensity of irrigation = 6400 x 50/100 = 3200 hectares The water required at the head of the distributary = 3200/2000 = 1.6 cumec.

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