Multiple choice

The culturable command area for a distributary channel is 20,000 hectares. Wheat grown in the entire area and the intensity of irrigation is 50%. The kor period for wheat is 30 days and the kor water depth is 120 mm. The outlet discharge for the distributary should be

  1. 2.85 m3/s

  2. 3.21 m3/s

  3. 4.63 m3/s

  4. 5.23 m3/s
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Duty (D) = 8.64 * B / Delta. Here, B = 30 days, Delta = 0.12 m. D = 8.64 * 30 / 0.12 = 2160 ha/cumec. Area = 20,000 * 0.5 = 10,000 hectares. Discharge = Area / D = 10,000 / 2160 = 4.63 m^3/s.

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