SSC JE Civil Engineering 29-Oct-2020 Shift 1 Paper

The various types of irrigation efficiencies are given below:
1. Water Conveyance Efficiency: It is the ratio of water delivered to field (Wf) to the water diverted from reservoir (W) .
Mathematically it is given as:
Water diverted from reservoir – Water delivered to field = seepage loss in canal + Evaporation from canal.

2. Water application Efficiency: It is the ratio of water stored in the root zone (Ws) to the water delivered to field $\left({\mathrm{W}}_{\mathrm{f}}\right)$ .
Mathematically it is given as:
Water delivered to field – Water stored in the root zone = Runoff + Evaporation

3. Water Used Efficiency: It is the ratio of water used consumptively to the water delivered in the field.

Water Used = Water stored $\left({\mathrm{W}}_{\mathrm{s}}\right)$ – leaching – other requirements

4. Water Storage Efficiency: It is the ratio of water actually stored in the root zone and water which is to be stored in the root zone to bring the water content to its field Capacity.