University of Edinburgh
 

BSL Geography Glossary - Catchment Area/Drainage Basin - definition

Definition: When rain falls on an area of land, the water travels downhill and typically collects into a lake or travels on through a river. The area where this happens is called a Catchment Area. In a catchment area water can be collected through rain or drained by rivers or streams. A catchment area can also be known as Drainage Basin.