List of watershed topics explained

This list embraces topographical watersheds and drainage basins and other topics focused on them.

Terms – different uses

The source of a river or stream is the furthest place from its estuary or confluence with another river, and is alternatively known as a "watershed" and/or "headwaters" in some countries.
The confluence is the meeting of two rivers or streams, and may sometimes be known as "headwaters".
A drainage basin is an area of land where all surface water converges to a single point at a lower elevation. In North America, "watershed" is used for this sense, while elsewhere terms like "catchment" or "drainage area" are used.
A drainage divide is the line that separates neighboring drainage basins. In English-speaking countries outside of North America, this is normally known as a "watershed".

Drainage divides category
The European Watershed, the line dividing the drainage basins of the major rivers of Europe
The Drainage divides, the lines dividing drainage basins in North America (i.e.: Great Basin Divide and Great Basin hydrologic region)

A worldwide list of watersheds

Watershed management, the management of drainage basins
Watershed Protection and Flood Prevention Act, a United States law controlling drainage and water storage
Watershed district (Minnesota), one of a number of government entities in the US state of Minnesota which monitor and regulate the use of water in drainage basins
Watershed district (Russia), one of twenty groups of water bodies listed in the Water Code of the Russian Federation

Center for Watershed Ecology