Surface runoff
Videos
Surface runoff is the unconfined flow of water over the ground surface, in contrast to channel runoff. It occurs when excess rainwater, stormwater, meltwater, or other sources, can no longer sufficien
Runoff flowing into a stormwater drain
Surface runoff from a hillside after soil is saturated
Urban surface water runoff
Urban runoff flowing into a storm drain
Erosion
Videos
Erosion is the action of surface processes that removes soil, rock, or dissolved material from one location on the Earth's crust and then transports it to another location where it is deposited. Erosi
Surface runoff
…not allow percolation of the water down through the soil to the aquifer. It is instead forced directly into streams or storm water runoff drains, where erosion and siltation can be major problems, even when flooding is not. Increased runoff reduces groundwater recharge, thus lowering the water table and making…
An actively eroding rill on an intensively-farmed field in eastern Germany. This phenomenon is aggravated by poor agricultural practices because when ploughing, the furrows were traced in the direction of the slope rather than that of the terrain contour lines.
A natural arch produced by the wind erosion of differentially weathered rock in Jebel Kharaz, Jordan
Soil and water being splashed by the impact of a single raindrop
A spoil tip covered in rills and gullies due to erosion processes caused by rainfall: Rummu, Estonia