How does surface irrigation work?

It is considered at the least complex form of irrigation in which water is distributed over the surface of the soil by gravity. There are three different forms of surface irrigation such as basin irrigation, border irrigation and furrow irrigation. Water is made to flow from a higher level along the edge of the field such that it covers the entire farm land. There is no pipeline used in surface irrigation, rather soil in the farm is adjusted to make way for the water flow.