Modelling of planimetric/historical changes of the Geul river (The Netherlands)

TL;DRAbstract

This report presents the analyses and conclusions of a study on the planform evolution of the Geul river in the last 80 years. The results are compared with those of studies carried out by the Vrije Universiteit Amsterdam (VUA). The Geul river is to tributary of the Meuse River (The Netherlands). It has been straightened and protected against the erosion in the past, but since 1980 some stretches are allowed to meander freely. A meandering stretch near the Belgian border has been analysed. Historical planform changes are analysed with aerial photographs between 1935 and 2003. Channel migration is observed through the movement of the centreline of the river for each photograph. Channel width evolution, the presence of trees and its effects are also studied from the photos. In order to simulate the planform changes of the Geul river, the river planform model Miandras (Crosato, 1990) has been applied. Flow parameters (discharge, Chézy factor...) are analysed and discussed. After the calib

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