Ephemeral drainage definition

Ephemeral drainage means a stream or reach of a stream that flows only in direct response to precipitation or to the melting of snow or ice in the immediate watershed.
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Ephemeral drainage for purposes of this LAMP, means a stream, or other drainage such as a roadside ditch, that flows for less than five days after the passage of a storm. An ephemeral stream only carries water in direct response to a precipitation event and it contains no water from a spring, snow, or other long-continuing surface source. Setback measurements are made from the edge of the channel.
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Related to Ephemeral drainage

  • Mine drainage means any drainage, and any water pumped or siphoned, from an active mining area or a post-mining area. The abbreviation “ml/l” means milliliters per liter.

  • Drainage means the removal of surface water or groundwater

  • drainage work means any watercourse and includes any land which is expected to provide flood storage capacity for any watercourse and any bank, wall, embankment or other structure, or any appliance, constructed or used for land drainage or flood defence;

  • Drainage area means a geographic area within which stormwater, sediments, or dissolved materials drain to a particular receiving waterbody or to a particular point along a receiving waterbody.

  • Drainage system means one or more artificial ditches, tile drains or similar devices which collect surface runoff or groundwater and convey it to a point of discharge.