Question

A field channel has a Cultivable Command Area of 2000 hectares. The intensity of irrigation of gram and wheat are 30% and 50% respectively. Gram has kor period of 18 days, kor depth 12 cm while, wheat has 18 days and 15 cm, The discharge required in the field channel to supply water to the command area during kor period is _____ $m^3/s$

• A. 1.427

Answer 1

The correct option is A 1.427

Gram and wheat are Rabi crops. Hence, both are grown in the same period.
Discharge required for gram.

$Q_1=\frac{A_1}{D_1}=\frac{2000\times 0.3}{8.64\times \frac{18}{0.12}}=0.463m^3/s$

Discharge required for wheat,

$Q_2=\frac{A_2}{D_2}=\frac{2000\times 0.5}{8.64\times \frac{18}{0.15}}=0.964m^3/s$

Total discharge,
$Q=Q_1+Q_2=1.427m^3/s$