A drainage basin, or catchment as it is also called, is the part of the land surface that is drained by a single river system.
Drainage Basin
Author: National Atlas Canada Canada Streamflow map - Drainage Basins RUNOFF AND STREAM FLOW ALL RIVERS OF CANADA 36X31.5
Canada Streamflow map - Drainage Basins
Characteristics of the drainage basin - The drainage basin - CCEA - GCSE Geography Revision - CCEA - BBC Bitesize
Drainage Basins in Florida, 1967
File:Canada drainage map - en.svg - Wikipedia
Drainage basin hydrological cycle
a. Modern drainage basin extents for the rivers involved in this study
Drainage patterns: Discordant drainage patterns & Concordant Drainage Patterns - PMF IAS
The Drainage Basin - My IGCSE years
Drainage Basins and Watersheds Simplified
Geographic locations of the 19 studied drainage basins and their
Major River basins in Virginia and West Virginia
Drainage basins - River processes - AQA - GCSE Geography Revision - AQA - BBC Bitesize