What Do You Mean by Runoff

runoff, in hydrology, quantity of water discharged in surface streams. … Runoff also includes groundwater that is discharged into a stream; streamflow that is composed entirely of groundwater is termed base flow, or fair-weather runoff, and it occurs where a stream channel intersects the water table.

What does runoff mean in geography?

The sum of all the water flowing over the drainage basin’s surface is called runoff. It is made up of streamflow, which is flow through permanent river channels, and overland flow or surface runoff.

What is runoff in agriculture?

noun. the portion of rainfall that runs over agricultural land and then into streams as surface water rather than being absorbed into ground water or evaporating. pollution of the lagoon from pesticides contained in agricultural runoff from the surrounding area.