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PORTAIL D'INFORMATION GÉOGRAPHIQUE

Geomorphological changes after river-meander surgery

Auteur :
RYCKBORST, H.

Description :
Before equilibrium can be reached again, a river bed must incise deeply for considerable distance upstream. Thereupon the river will start to make a new set of meanders not unlike the old meander pattern. The one-dimensional open-channel flow equation, when applied to river erosion (triggered by meander cutting), shows that the half life of such man-made disturbances ranges from hundreds to a thousand years. Consequently, man-made interference with natural rivers represents a costly capital operation, which requires a long term (50-100 years) commitment for up-keep, improvement and replacement, if not in the short run, then in the long run (next 500 years).


Type de document :
Article de périodique

Source :
Geologie en mijnbouw Delft, 1980, vol. 59, n°. 2, p. 121-128, Références bibliographiques : 9 réf.

Date :
1980

Langue :
Anglais
Droits :
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