Which of the following options best define water conveyance efficiency ?

Question

Question

This question was previously asked in

JKSSB JE Civil Jal Shakti 5 Dec 2022 Official Paper (Shift 2)

The ratio of the quantity of water delivered to the field and quantity of water pumped into the canal
The ratio of water stored in the root zone and the water delivered to the field
The ratio of water used beneficially and the water delivered to the field
The ratio of water stored in the root zone and the water needed before irrigation

Answer 1

Explanation:

i) Water Conveyance Efficiency, (ηc)

\(\boxed{{\eta _c} = \frac{{{W_f}}}{{{W_r}}} \times 100}\)

where, Wf = Water delivered to the field

Wr = Water delivered from the reservoir

It includes losses from canals in form of seepage, evaporation etc.

ii) Water Application Efficiency (ηa)

\(\boxed{{\eta _a} = \frac{{{W_s}}}{{{W_f}}} \times 100}\)

where, Ws = Water stored in the root zone

Wf = Water delivered to the field

iii) Water use Efficiency (ηu)

\(\boxed{{\eta _u} = \frac{{{W_u}}}{{{W_f}}} \times 100}\)

where, Wu = Water use consumptive.

Wf = Water delivered to the filed

iv) Water storage Efficiency (ηu)

\(\boxed{{\eta _u} = \frac{{{W_{s'}}}}{{{W_\eta }}} \times 100}\)

where, Ws’ = Actual water stored in the root zone

Wη = Water needed to be stored to bring the water content up to field capacity.