The width of a dowla is generally kept between 30 to 60 cm and its height above the road level should invariably be more than

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.