Question

The gross command area for a distributary is 5000 hectares, 80% of which is culturable irrigable. The intensity of irrigation for Rabi is 50%, and for Kharif is 30%. The average duty at the head of the distributary is 2000 hectares/cumec for the Rabi season and 900 hectares/cumec for the Kharif season. The discharge required at the head of the distributary from average demand considerations is

• A. 1.00 cumecs
• B. 1.33 cumecs
• C. 2.33 cumecs
• D. 3.33 cumecs

Answer 1

The correct option is B 1.33 cumecs

Gross Command Area = 5000 hectares
Culturable Command Area = 4000 hectares
Area irrigated by Rabi = 2000 hectares
Area irrigated by Kharif = 1200 hectares
Distribution required at the head of distributory from average demand consideration

$=\frac{1200}{900}=1.33cumecs$