Question

A canal was designed to supply the irrigation needs to 1200 ha of land growing rice of 140 days base period and having a delta of 134 cm. If the canal waters are used to irrigate wheat of base period 120 days and having a delta of 52 cm, the area that can be irrigated is

• A. 2651 ha
• B. 543 ha
• C. 3608 ha
• D. 399 ha

Answer 1

The correct option is A 2651 ha

$Q=\frac{Area}{Duty}$

$D=8.64B/\Delta$

$Q=\frac{A\Delta }{8.64B}$

Q is the same for wheat and rice

$A_w=A_r\frac{{\Delta }_r}{{\Delta }_w}.\frac{B_w}{B_r}$

$=\frac{1200\times 134\times 120}{52\times 140}$

$A_{wheat}=2651ha$