Watershed
the area from which water drains into a river is called the river's catchment. A river's watershed is the connecting ridges surrounding the watershed, and separating it from adjacent ones.
Watershed
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the drainage basin
The area from which water drains into a river is called the river's watershed or drainage basin. It includes all the land and waterways that contribute runoff to that particular river system. Rainfall and other sources of water collect in the watershed, eventually flowing into the river and its tributaries.
Watershed- the area of land where all of the water drains into a common water body, such as a river, lake, or ocean.
The Missouri River drains to the area of northwest of the Rockies. The Missouri River is 2565 miles long and is the longest river in the United States.
Since "river" refers to the body of water and "watershed" refers to the land area which drains into the river, the Mississippi River would be a ribbon of water rather than a watershed.
Drainage basin.
A watershed is an area of land that drains to a common body of water.
The River Trent.
A watershed is an area of land that drains to a common body of water.