A catchment is an area of land that is drained by a river and its tributaries.
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