Land area that drains water to a particular stream, river or lake that can be identified by tracing a line along the highest elevations between two areas on a map, often a ridge, and may encompass a number of smaller watersheds (micro-watersheds) that ultimately combine at a common point.
European Environment Agency Glossary, [Catchment area ](http://www.eea.europa.eu/themes/water/wise-help-centre/glossary-definitions/catchment-area)(17.11.2014).
Based on SDC, Water [Glossary](https://www.collaboration.eda.admin.ch/en/Documents/COO.2011.100.11.865247.pdf), Watershed (17.4.2015).