If the irrigation efficiency is 80%, conveyance losses are 20% and the actual depth of watering is 16 cm, the depth of water required at the canal outlet, is

Irrigation engineering is the process of artificially supplying water to the soil in order to grow crops. It is the science of designing and planning an efficient, low-cost irrigation system that is tailored to natural conditions.

Irrigation engineering is also being used to research water recycling methods and develop new ways of minimizing water seepage and evaporation loss.