the area of land drained by a river and its branches.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use river basin in a sentence
The infrastructure bill does earmark millions of dollars to improve river basin ecosystems and help fish get around man-made barriers across the country.
By 2017, they found, 37 percent of those river basins still weren’t seeing the amount of water flow that they had predrought.Rivers might not be as resilient to drought as once thought | Carolyn Gramling | May 13, 2021 | Science News
The only river basin of any importance is that of the Vilaine, which flows through Rennes.
Fundulus kansae has been found in the lower part of the Walnut river basin, especially where petroleum pollution was evident.Fishes of Chautauqua, Cowley and Elk Counties, Kansas | Artie L. Metcalf
This seems to be the only record of this species from the Walnut river basin at the present time.Fishes of Chautauqua, Cowley and Elk Counties, Kansas | Artie L. Metcalf
The lower part of the river-basin was inhabited by the Angrivarii.
These caons link the buried river basin of the lower stream with the upper river valleys.Mount Rainier | Various
Scientific definitions for river basin
The land area that is drained by a river and its tributaries. The Mississippi River basin, for example, is a vast area that covers much of the central United States from the central ranges of the Appalachian Mountains in the east to the eastern ranges of the Rocky Mountains in the west, funneling toward its delta in southern Louisiana and emptying into the Gulf of Mexico.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.