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Irrigation - Engineering

Q1:

If the optimum depth of kor watering for a crop is 15.12 cm, the outlet factor for the crop for four week period in hectares per cumec, is

A 1000

B 1200

C 1400

D 1600

E 2000

ANS:D - 1600

Given is ;

δ = 15.12cm = 0.1512mm.
b = 4 * 7 = 28 days.

We know that the relation of δ, base period and duty is;
δ =8.64*b/duty.
so, duty=8.64*b/δ.
= 8.64 * 28/0.1512 = 1600 is the answer.