Drainage area definition

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 area means a land area, water area, or both from which runoff flows to a common point.
Drainage area means that area contributing runoff to a single point measured in a horizontal plane, which is enclosed by a ridge line.

Examples of Drainage area in a sentence

  • Drainage area upstream of the site is less than 1 square mile: the site is in an identified floodplain where the limits of the floodway and fringe have not yet been determined and the drainage area upstream of the site is less than 1 square mile, the Floodplain Administrator shall require the applicant to provide an engineering analysis showing the limits of the floodplain and 1% annual chance flood elevation for the site.

  • Drainage area upstream of the site is greater than 1 square mile: If the site is in an identified floodplain where the limits of the floodway and fringe have not yet been determined, and the drainage area upstream of the site is greater than 1 square mile, the Floodplain Administrator shall require the applicant to forward the application, along with all pertinent plans and specifications, to the Indiana Department of Natural Resources for review and comment.

  • Drainage area maps depicting predevelopment and post development runoff flow path segmentation and land use; e.

  • Drainage area is accumulated using this model that has two flow paths from each grid cell based on the angle proportions.


More Definitions of Drainage area

Drainage area means the surface area draining storm water run-off.
Drainage area means any parcel or parcels of land within the area whose drainage causes or contributes to flood conditions upon or in the vicinity of a designated stream or body of water.
Drainage area means the contributing area to a single point of drainage concentration, expressed in units of area, also called catchment area, watershed, and river basin.
Drainage area means an area declared to be a drainage area pursuant to section 104;
Drainage area means that area contributing runoff to a single point.
Drainage area means an area, measured in a horizontal plane, enclosed by a topographic divide from which storm water runoff normally drains to a particular point of interest such as a stream, catch basin, detention basin, property line, BMP, etc. This term is synonymous with “watershed”.
Drainage area means an area of land constituted or deemed to be constituted under this Act as a drainage area.