Question

The culturable commanded area for a distributary is $2\times {10}^8{m}^2$. 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

• A. $2.63m^3/s$
• B. $4.63m^3/s$
• C. $8.58m^3/s$
• D. $11.58m^3/s$

Answer 1

The correct option is B $4.63m^3/s$

Area to be irrigated= culturable command area × intensity of irrigation

$=2\times {10}^8\times 0.4$
$=8\times {10}^7{m}^2$

Kor depth = 0.14 m
Kor period = 4 weeks

Water discharged in Kor period = Volume of water required by crop

$Q\times 4\times 7\times 86400=8\times {10}^7\times 0.14$

$\Rightarrow Q=4.63m^3/s$