Drainage Basins

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.

Remote Sensing, Free Full-Text

Drainage Basins Map Diagram

HydroSHEDS (BAS) - North America drainage basins (watershed boundaries) at 30s resolution

Solved Part 1 - Drainage Basins and Divides As illustrated

Regional Basins

Ocean drainage basin map of the United States [OC] : r/dataisbeautiful

File:Canada drainage map - en.svg - Wikipedia

Long profiles - Water on the Land

Drainage Basins and Watersheds Simplified