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.
10(aa) The Drainage Basin Concept
Geography - Theme 2: Rivers - Drainage Basins + Characteristics of a River Diagram
What are the features of a drainage basin? - Internet Geography
Drainage Basins
Drainage basin hydrological cycle
File:Iran drainage basins.png - Wikimedia Commons
PPT - Drainage Basins PowerPoint Presentation, free download - ID:2243406
Watersheds and Drainage Basins
Drainage patterns: Discordant drainage patterns & Concordant Drainage Patterns - PMF IAS
Long profiles - Water on the Land
10(aa) The Drainage Basin Concept
Characteristics of the drainage basin - The drainage basin - CCEA - GCSE Geography Revision - CCEA - BBC Bitesize
Major River basins in Virginia and West Virginia
Drainage Basins and Watersheds Simplified