Mitigation of Channel Bed Erosion through Floodplain Lowering and Nourishments

Abstract (2024)

Authors

C. Ylla Arbos Rivers, Ports, Waterways and Dredging Engineering - CEG
R.M.J. Schielen Rivers, Ports, Waterways and Dredging Engineering - CEG , Rijkswaterstaat
Saskia van Vuren Rijkswaterstaat
Yvo Snoek Rijkswaterstaat
A. Blom Rivers, Ports, Waterways and Dredging Engineering - CEG
Research Group
Rivers, Ports, Waterways and Dredging Engineering (CEG) (TU Delft)
Copyright: © 2024 C. Ylla Arbos, R.M.J. Schielen, Saskia van Vuren, Yvo Snoek, A. Blom
Numerical modelling Nourishments Channel bed erosion Erosion mitigation
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Published Date

2024

Language

English

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Faculty

Civil Engineering & Geosciences

Department

Hydraulic Engineering

Research Group

Rivers, Ports, Waterways and Dredging Engineering

Abstract

Channel adjustment in engineered rivers is often associated with channel bed incision (e.g., Chowdhury et al., 2023, Czapiga et al., 2022a, 2022b, Ylla Arbós et al., 2021). Channel bed incision reduces the stability of in-river structures, exposes river-crossing cables and pipelines, and the spatial variability of channel bed incision due to less erodible reaches creates shipping bottlenecks.
Various measures have been implemented to cope with these issues. They range from sediment nourishments to erosion control structures (e.g., Habersack and Piégay, 2007). Our objective is to assess the potential of floodplain lowering and sediment nourishments in mitigating large-scale channel bed incision in engineered rivers affected by climate change, considering a spatial scale of hundreds of kilometres. Our domain of interest is the Rhine River between Bonn, Germany, to Gorinchem, Netherlands. This reach has been extensively channelized during the 18th-20th centuries for improved navigation and flood protection (e.g., Ylla Arbós et al., 2021).