Sediment transport and morphodynamics of two dynamic and highly modified rivers: valley management issues and keys for river stakeholders

Abstract : River hydrology and morphodynamics are significantly modified by human activities. In many watersheds, this has led to a flashier hydrological regime and an increase of flooding risk. In addition, a river system can be highly instable at different spatial and temporal scales. When this instability conflicts with human use, sediment fluxes and morphody-namics issues become a key factor for river management. However, sediment mobility is frequently not considered by river managers. We have studied two river systems, the Durance River (France) and Wilket Creek (Canada). Even if the spatial scales of these systems are significantly different, it is interesting to notice that management issues converge. More importantly, it appears that long-term management issues can only be solved by an integrative approach that considers sediment transport for the whole system. The objective of this poster is to present a methodology to characterize gravel-bed river mobility in highly modified systems in order to support decision making for river stakeholders.
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Margot Chapuis, Simon Dufour, Bruce Macvicar, André Roy, Bernard Couvert. Sediment transport and morphodynamics of two dynamic and highly modified rivers: valley management issues and keys for river stakeholders. 8th International Conference on Geomorphology, Aug 2013, Paris, France. 2013, ⟨http://www.geomorphology-iag-paris2013.com/fr⟩. ⟨hal-01285863⟩

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