Spatial and temporal variation of sediment production in the upstream part of the Loire River (35000 km²)
- 1EDF - R&D, National Hydraulics and Environment Laboratory, France
- 2LHSV - Laboratory for Hydraulics Saint-Venant, France
- 3BRGM - French geological survey, France
- 4EDF - R&D, Electrical Engineering and Structural Mechanics Department, France
We try to explain the variations of the sediments flux ("daily production") measured at a water intake on the French Loire River during "10 years". Over the last decade, this intake channel has experienced a change in its siltation dynamic, resulting in changes of sediments type and volume settled at its bottom. These changes may be explained, either by the variation of sediments production rates (soil erosion) on the upstream watersheds or by the fluvial dynamics of the Loire River, in particular, by the storage and remobilization of fine sediments in the complex morpho dynamics of the riverbed.
In this context, we will evaluate the variation of sediments production rates (soil erosion) in the upstream watersheds, over an area of approximately 35,000 km². The aim is to determine how the produced fluxes evolve in space (spatial distribution) through the principle of sediment yield but also to study the changes in temporal dynamics and to identify its potential causes, for instance lithology, landuse, rainfall events…
How to cite: Belbal, B. H., Antoine, G., Boyaval, S., Cerdan, O., Taccone, F., and Vandromme, R.: Spatial and temporal variation of sediment production in the upstream part of the Loire River (35000 km²), EGU General Assembly 2023, Vienna, Austria, 24–28 Apr 2023, EGU23-16546, https://doi.org/10.5194/egusphere-egu23-16546, 2023.
