Drainage Basin

A drainage basin is the entire area drained by a river and its tributaries.

Drainage Basin Hydrological System

Drainage basin of the Elbe River

Drainage Basin Rashid's Blog: An Educational Portal

Mapping the World's River Basins by Continent

The Mississippi-Missouri Drainage Basin

Drainage Basin

Drainage Basins

File:Columbia tributaries drainage basin map-fr.svg - Wikimedia Commons

Basin Maps • Mackenzie River Basin Board

Drainage Basin Definitions Diagram

Savannah - The River Basin Center

Managing water for the future: Can web-based river basin assessments show the way forward?

Map of the Nelson Churchill River Basin with major sub-basins, rivers

Evaluating the Economic Benefits of Land Protection in the Savannah River Basin - Center for Watershed Protection

What are drainage basins and what are their characteristics? - Internet Geography