River Basin

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river basin

[′riv·ər ‚bās·ən]
The area drained by a river and all of its tributaries.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

River Basin


the part of the earth’s surface that includes a layer of water-bearing rock from which waters flow into a separate river or river system. The basin of each river includes surface and underground drainage. A surface drainage area is a part of the earth’s surface from which waters flow into a given river system or river. Underground drainage areas are formed by masses of loose deposits from which the water flows into the river network. In general, surface and underground drainage areas do not coincide; however, since it is practically very complicated to determine the boundaries of an underground drainage area, the size of the river basin is taken to mean only the surface drainage area. Errors arising as a result of the arbitrary identification of the dimensions of a river basin with the surface drainage area may be essential only for small rivers and larger rivers flowing under geological conditions that favor good water exchange among neighboring basins (for example, a karst). The boundary between individual river basins runs along watershed divides.

Basins are divided into drained and undrained types. Undrained basins are intracontinental drainage regions that are not linked to the ocean by river basins. The forms and dimensions of basins are most varied and depend upon geographical position, topography, and the geological structure of the locality. The tributaries have their own small basins whose general confluence composes the area of the basin of the main river.


The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
The Tigris-Euphrates River Basin: This basin faces considerable challenges across all index areas.
Participants discussed the main challenges in managing the transboundary river basin and reviewed co-operation opportunities in the context of best international practices.
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Only by understanding the current state of the Mekong River basin, how it has changed and the drivers of these changes, can we manage today's challenges more effectively.
The four Upper Colorado River Basin states Wyoming, Colorado, Utah and New Mexico and one Lower Colorado River Basin state Nevada have completed all the necessary steps to make the DCP a reality.
The Samson board of directors recently approved the continuation of the Powder and Green River Basin delineation program, which is expected to be finalized in March.
'The dredged silt from these rivers, presumably peat soil, could be used in reinvigorating the fertility of the farmlands near the river basins,' Pinol added.
New Delhi [India], Nov 22 ( ANI ): National Mission for Clean Ganga, in association with GIZ India, organised an International workshop in New Delhi on River Basin Management at different levels and the role of River Basin Organisations (RBOs) in support of Ganga Rejuvenation.
He said, 'This River Basin is one of the least funded out of the 12 in the year under review.