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  1. The culturable commanded area for a distributary is 2 × 108m². The intensity of irrigation for a crop is 40%. If kor water depth and kor period for the crop are 14 cm and 4 weeks, respectively, the peak demand discharge is
    1. 2.63 m³/s
    2. 4.63 m³ /s
    3. 8.58 m³/s
    4. 11.58 m³/s
Correct Option: B

Culturable command area (CCA) = 2 × 108 m2
Area to be irrigated,

A =
40
× 2 × 108 = 2 × 107 m2
100

Period, B = 4 weeks = 7 × 4 = 28 days
Depth, Δ = 14 m = 0.14 m
D = 8.64
B
D

= 8.64 ×
28
= 1728 m²/cumec
0.14

Discharge, Q =
A
=
8 × 107
D1728

(Convert to m³/s)
Q = 4.63 m³/s



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