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Caractérisation longitudinale du fond du lit du Rhône du Léman à la mer : continuum, discontinuum et contrôles naturels et anthropiques
| Content Provider | Semantic Scholar |
|---|---|
| Author | Parrot, Elsa Piégay, Hervé Tal, Michal Vaudor, Lise |
| Copyright Year | 2012 |
| Abstract | The focus of this study is to characterize the evolution of the longitudinal bed profile of the Rhone River along its entire length. As is the case for all rivers, the longitudinal profile reflects the integral response of the system, both natural and anthropogenic. The study is performed on the long profile extracted from bathymetric data for the entire 512 km length of the river. We use statistical analysis to characterize the current state of the long profile and its evolution over the last century. It has pointed out 55 homogeneous reaches to establish a typology of physical characteristics. The statistical analysis of long profile, particularly the study of riffle-pool sequences, enables evaluation of these reaches from a morphological perspective. We present key features of the geometric evolution of the Rhone River based on a quantitative analysis of available bathymetric data over the last century. This analysis enables identification of major knickpoints, stable and mobile reaches, and hot-spots of erosion and aggradation, and provides a first step towards identifying the causes of historical morphological variations and their relative importance. The analysis of vertical changes paves the way towards a more general understanding of how river systems respond to imposed changes through adjustments to both channel morphology and slope. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://www.graie.org/ISRivers/actes/pdf2012/1B116-048PAR.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
