Long term evolution of a dam reservoir subjected to regular flushing events

Evolution morphologique à long-terme d'un réservoir de barrage soumis à des chasses régulières

L. Guertault (1) , B. Camenen (1) , C. Peteuil (2) , André Paquier (1)

1 UR HHLY - Hydrologie-Hydraulique
2 CNR - Compagnie Nationale du Rhône

An analysis of the long term morphological evolution of the Génissiat reservoir (France) is provided. First, a methodology for bathymetric data processing and reservoir sediment volume budget calculation is described. An estimation of global uncertainties in volume calculation is proposed. The reservoir bathymetric budget for several dam flushing events and interflush periods is presented, showing the global decrease of deposited sediment volume with time. The spatial dynamics of the reservoir subreaches is highlighted and typical patterns in flush and interflush periods are identified.

Mots clés: BATHYMETRIE; SEDIMENT; BARRAGE; RESERVOIR; OBSERVATOIRES HOMMES-MILLIEUX; HYDROMORPHOLOGIE; LABEX DRIIHM; OHM VALLEE DU RHONE

Domaines: Sciences de l'environnement

L. Guertault, B. Camenen, C. Peteuil, André Paquier. Long term evolution of a dam reservoir subjected to regular flushing events. Advances in Geosciences, 2014, 39, pp.89-94. ⟨10.5194/adgeo-39-89-2014⟩. ⟨hal-01118895⟩