A drainage basin is an area where all surface water converges to a single point at a lower elevation to join another body of water.
Drainage basin - Wikipedia
Drainage basin - Wikipedia
Fluvial Landforms: What Is Drainage Basin? - WorldAtlas
Landforms in the World: Fluvial Landform ( 10. Drainage Basin )
What are Landforms? - WorldAtlas
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Fluvial Landforms: What Is Drainage Basin? - WorldAtlas
River Systems and Fluvial Landforms - Geology (U.S. National Park
Geosciences, Free Full-Text