Difference between revisions of "Catchment"
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A catchment is an area of land that is drained by a river and its tributaries. | A catchment is an area of land that is drained by a river and its tributaries. | ||
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==Delineation criteria== | ==Delineation criteria== | ||
Delineation can be made based on the topographic divide (watershed) using digital elevation models (DEM) and a Geographic Information System (GIS), or with an existing catchment boundary database. | Delineation can be made based on the topographic divide (watershed) using digital elevation models (DEM) and a Geographic Information System (GIS), or with an existing catchment boundary database. | ||
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==Methods and Data sources== | ==Methods and Data sources== | ||
* Digital elevation models (e.g. [http://epp.eurostat.ec.europa.eu/portal/page/portal/gisco_Geographical_information_maps/geodata/digital_elevation_model EU-DEM]) using GIS algorithms to delimit the divide | * Digital elevation models (e.g. [http://epp.eurostat.ec.europa.eu/portal/page/portal/gisco_Geographical_information_maps/geodata/digital_elevation_model EU-DEM]) using GIS algorithms to delimit the divide | ||
* EU-wide [http://ccm.jrc.ec.europa.eu/php/index.php?action=view&id=23 CCM2 River and Catchment Database (v2.1)] or [http://www.eea.europa.eu/data-and-maps/data/european-catchments-and-rivers-network EEA Ecrins] (connected watersheds, rivers, lakes, monitoring stations, dams) data set | * EU-wide [http://ccm.jrc.ec.europa.eu/php/index.php?action=view&id=23 CCM2 River and Catchment Database (v2.1)] or [http://www.eea.europa.eu/data-and-maps/data/european-catchments-and-rivers-network EEA Ecrins] (connected watersheds, rivers, lakes, monitoring stations, dams) data set | ||
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Latest revision as of 15:34, 7 January 2019
Catchment
Definition
A catchment is an area of land that is drained by a river and its tributaries.
Delineation criteria
Delineation can be made based on the topographic divide (watershed) using digital elevation models (DEM) and a Geographic Information System (GIS), or with an existing catchment boundary database.
Methods and Data sources
- Digital elevation models (e.g. EU-DEM) using GIS algorithms to delimit the divide
- EU-wide CCM2 River and Catchment Database (v2.1) or EEA Ecrins (connected watersheds, rivers, lakes, monitoring stations, dams) data set
The River Frome catchment is a medium-sized, lowland, calcareous catchment located in southern England.
