A river basin or drainage basin is an area of land drained by a river and its tributaries. The edge of the drainage basin is known as the watershed.
Drainage Basins (System, Features)
What is downstream? River information and facts - Teaching Wiki
How does a drainage basin work? Made SIMPLE - The geography teacher
River Systems and Fluvial Landforms - Geology (U.S. National Park Service)
The drainage basin: a component of the water cycle - Internet Geography
AS Hydrology Mrs Conrad's KIS I-ALEVEL Geography Support
IB Geography - Drainage Basin Hydrology & Geomorphology —
Drainage Basin Hydrology (Inputs, Flows, Storages, Output)
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Potomac Basin Facts - ICPRB
Drainage Basin Hydrology (Inputs, Flows, Storages, Output)
Drainage Basin Hydrology (Inputs, Flows, Storages, Output)
Mississippi River System - Wikipedia