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PROCESSUS FONDAMENTAUX CONDITIONNANT LES APPORTS DE SEDIMENTS FINS DANS LES RETENUES
- OPTIMISATION DES METHODES DE MESURE ET MODELISATION STATISTIQUE -

Abstract : Suspended Particle Matter (SPM) transport in rivers results from soil erosion processes and particles transport through the watershed. SPM dynamics is analyzed in an alpine context over two Mediterranean watersheds (the Asse and the Bléone), two mountainous watersheds characterized by snow-melt regime (the Ferrand and the Romanche, French Alps) and a larger rainfall/snow-melt regime watershed, the Isère at Grenoble.
High frequency turbidity records are converted to SPM chronicles using a relation between suspended sediment concentration and turbidity. SPM concentration and water discharge data permit to identify fundamental hydro meteorological processes responsible for SPM transport in the fluvial system. SPM fluxes temporal variability is highlighted and described for different time steps, from daily to yearly. Some statistical indicators are calculated and used to describe SPM fluxes dynamics and to characterize SPM transport regime.
A statistical tank model simulating daily SMP fluxes is then presented. This model is calibrated and validated using measured SPM fluxes chronicles. Using calibrated parameters set and historical water discharge and rainfall data, the model can simulate SPM fluxes over longer periods. For each watershed, various parameters sets are used to simulate different SMP transport scenarios over the last 30 years.
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Contributor : Vincent Mano <>
Submitted on : Tuesday, March 3, 2009 - 10:45:25 AM
Last modification on : Thursday, November 19, 2020 - 3:54:29 PM
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Vincent Mano. PROCESSUS FONDAMENTAUX CONDITIONNANT LES APPORTS DE SEDIMENTS FINS DANS LES RETENUES
- OPTIMISATION DES METHODES DE MESURE ET MODELISATION STATISTIQUE -. Hydrologie. Université Joseph-Fourier - Grenoble I, 2008. Français. ⟨tel-00365349⟩

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