Author(s): Eva Van Hofslot; Hermjan Barneveld; Helene Boisgontier; Lieke Melsen
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Abstract: The annual loads of gravel, sand and silt are important indicators to explain and simulate morphological processes in a river and assess the response to anthropogenic measures and as such crucial for sustainable management of river systems. For the Meuse catchment, the sediment balance is not well known yet. An important question is what the actual loads of alluvial sediment in the river system are. Observed sediment yields are only available for part of the Meuse catchment, requiring an alternative approach to assess erosion, deposition and transport for the complete system: the use of models. However, modelling concepts that are distributed, applicable for short- and long-term simulations, and that distinguish between different types of sediment, are sparse. WFLOW-SEDIMENT is a new physically based sediment dynamics model, simulating the sediment yield based on the distributed hydrological model WFLOW (Boisgontier and van Gils, 2020). Furthermore, WFLOW-SEDIMENT categorizes the sediment yield into different sediment classes. The model has already been proven useful in similar studies to assess a sediment budget in Europe (Rhine and Seine basins (Boisgontier and van Gils, 2020) ) and Japan (Tenryuu basin, Boisgontier and Giri, 2021) ). For the Meuse catchment, a calibrated hydrological WFLOW model exists up to the city of Mook in the Netherlands (Fig. 1). The main objective of this study is to construct, calibrate and apply the WFLOW-SEDIMENT model of the Meuse catchment for the last 25 years, and assess the sensitivity of the calculated sediment yield of subcatchments for parameter settings.
Year: 2022