Runoff

Science / Geology / Runoff: Liquid water moving over the land surface as a sheet or channelized flow. The portion of precipitation that moves over the ground instead of evaporating or infiltrating.
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Direct Runoff

Business / Agriculture / Direct Runoff: Water that flows over the ground surface or through the ground directly into streams, rivers, and lakes. Runoff is the cause of rill erosion and a source of nonpoint pollution. MORE

Surface Runoff

Business / Agriculture / Surface Runoff: Precipitation, snow melt, or irrigation water in excess of what can infiltrate the soil surface and be stored in small surface depressions: a major cause of erosion and transporter of nonpoint source MORE

Drainage Divide

Science / Geology / Drainage Divide: The boundary between two adjacent drainage basins. Drainage divides are ridge crests (or less obvious locations where slope of the landscape changes direction). Runoff produced on one side of the ridg MORE

Nonpoint Source Pollution

Business / Agriculture / Nonpoint Source Pollution: Pollutants that are not discharged or emitted from a specific 'point' source, such as a pipe or smokestack. Nonpoint water pollutants are often carried from dispersed, diverse sources into water chann MORE