Outcome
In this project we gain insight on the large-scale river response to human intervention and climate change. We see that the river is still adjusting to past river normalizations (18th-20th) through changes in the channel slope, which lead to bed incision. This response is more prominent than the response to climate change scenarios.
Motivation and Practical Challenge
River bed erosion is a critical issue for river managers, as it affects navigation, flood safety and ecology. Understanding why erosion occurs and how it may develop is therefore crucial to ensure that all the river functions can be fulfilled.
In the lower Rhine River the channel bed erodes over hundreds of kilometers in response to past and current human intervention (e.g. normalization works), and to climate change, which alters river discharge and sea level.
While river bed incision and aggradation are particularly problematic at some specific locations (e.g., around fixed beds like Nijmegen, Sint Andries or Spijk), we need to better understand their large-scale dynamics, as these dynamics provide answers to local problems. Understanding these dynamics is also crucial to ensure that future river intervention works with the river instead of against it. While the study focuses on the lower Rhine River, the methods are applicable to engineered rivers in general.
Research Challenge
We have three main questions:
- How has the lower Rhine River responded to past human intervention, in terms of bed level change and bed surface grain size change?
- How does the lower Rhine River respond to different climate change scenarios, and how does this response compare to the response to past human intervention?
- How does the lower Rhine River respond to future scenarios of human intervention, and how does this add up to the ongoing response?
Innovative Components
- We have investigated channel response to past human intervention by analyzing long records (1920-2020) of field data on bed elevation and bed surface grain size, as well as historical records of human intervention.
- We have developed a modeling framework to assess large-scale channel response to human intervention and climate change.
- We have created a highly schematized 1D numerical model of the lower Rhine River, and calibrated it such that it satisfactorily represents multi-decadal channel response, in terms of bed level change and bed surface grain size changes.
- We have tested the model for different climate scenarios (i.e., scenarios of climate-related changes to the boundary conditions: water discharge, sediment flux, sea level) and for scenarios of human intervention.
- We have compared channel response to climate change with channel response to human intervention, and we have concluded that the latter is dominant in engineered rivers, such as the lower Rhine River.
Relevant for Whom and Where
This research is relevant for the following user groups:
- River managers and engineers — at initial stages of intervention/river management strategy planning, and to evaluate how local problems (e.g., around fixed layers), are part of larger scale dynamics.
- Researchers – to better understand large-scale channel response in engineered rivers.
Findings and Practical Application
- While river bed erosion is particularly challenging at specific locations (e.g. around fixed beds), it is crucial to understand that it follows much larger scale dynamics.
- River response to human intervention is dominant, more so than river response to climate change.
- Highly schematized, calibrated 1D numerical models are a fast and very useful tool to assess large-scale channel response to climate change and human intervention.
- Different management policies across regions or countries can lead to large differences in channel response. Transboundary river studies are therefore essential.
- Frequent monitoring of the river bed is crucial to understand river dynamics.
Status for Day to Day Practice
Potential users should consider large-scale dynamics even for local intervention/management strategy planning, and keep in mind that it is possible to follow the same modeling framework developed in this project and apply it to any river
Next Steps
Some types of river intervention are inherently two or three-dimensional. While schematized 1D numerical models can provide insight on their effects, 2D studies would help us understand some features such as fixed beds, or bifurcations.
In addition, while some characteristics of the river are intensely and accurately monitored (e.g., water levels), sediment-related measurements (like sediment fluxes or bed surface composition) are much scarcer and uncertain. More sediment-related data collection would help reduce the uncertainty of these studies.
Last modified: 09/11/2022
Contributing researchers
![](https://cdn.bullit.digital/kbase/sites/4/20220614151341/Claudia-Ylla-Arbos-150x150.jpg)
Claudia Ylla Arbos
TU Delft
Toekomstige reactie van de benedenloop van de Rijn op ingrepen en klimaatverandering
Anna van den Hoek
Dr. ir. Anouk Bomers
![](https://cdn.bullit.digital/kbase/sites/4/20230822132848/Duo-interview-foto-Anouk--150x150.jpg)
Anouk Boon
Universiteit Utrecht
![](https://cdn.bullit.digital/kbase/sites/4/20220624133755/photo-astrid-150x150.png)
dr. ir. Astrid Blom
TU Delft
![](https://cdn.bullit.digital/kbase/sites/4/20221122134414/aukjespruyt-150x150.jpg)
Aukje Spruyt
Deltares
![](https://cdn.bullit.digital/kbase/sites/4/20220923132444/bart-vermeulen-150x150.jpg)
Dr. Bart Vermeulen
Wageningen University & Research
![](https://cdn.bullit.digital/kbase/sites/4/20220614151341/Claudia-Ylla-Arbos-150x150.jpg)
Claudia Ylla Arbos
TU Delft
![](https://cdn.bullit.digital/kbase/sites/4/20221122133123/Dirk-sytze-kootstra-150x150.jpg)
Dirk-Sytze Kootstra
Rijkswaterstaat
![](https://cdn.bullit.digital/kbase/sites/4/20240205123422/eki-150x150.jpg)
Eki Liptaiy
TU Delft
![](https://cdn.bullit.digital/kbase/sites/4/20220511125445/HKV-Logo-150x150.png)
dr. ir. Erik Mosselman
Deltares
![](https://cdn.bullit.digital/kbase/sites/4/20220516123300/2015-RWS-RVG-Photography-5-Evelien_kleiner.jpg)
Evelien van Eijsbergen
Rijkswaterstaat
prof. dr. Hans Middelkoop
Universiteit Utrecht
![](https://cdn.bullit.digital/kbase/sites/4/20220619144903/Hermjan-Barneveld-e1655643004456-150x150.jpg)
Hermjan Barneveld
Wageningen University & Research
![](https://cdn.bullit.digital/kbase/sites/4/20220602110502/Iris-Niesten-e1654160752420-150x150.jpg)
Iris Niesten
Wageningen University & Research
![](https://cdn.bullit.digital/kbase/sites/4/20220614151343/Jana-Cox-150x150.jpg)
Jana Cox
Universiteit Utrecht
Dr. Jord Warmink
![](https://cdn.bullit.digital/kbase/sites/4/20240205122436/Jclimo-150x150.jpg)
Joshua Climo
Radboud Universiteit
![](https://cdn.bullit.digital/kbase/sites/4/20220704153305/Judith-Zomer-150x150.jpg)
Judith Zomer
Wageningen University & Research
![](https://cdn.bullit.digital/kbase/sites/4/20221122132538/koen-berends-125x150.jpg)
Koen Berends
Deltares
![](https://cdn.bullit.digital/kbase/sites/4/20220920161119/Pasfoto-nov-2019-150x150.jpg)
Lieke Lokin
Universiteit Twente
![](https://cdn.bullit.digital/kbase/sites/4/20220624144646/Maarten-Kleinhans-e1656074875435.jpg)
prof. dr. Maarten Kleinhans
Universiteit Utrecht
![](https://cdn.bullit.digital/kbase/sites/4/20220923151802/marcel-van-der-perk-150x150.jpg)
Marcel van der Perk
Universiteit Utrecht
![](https://cdn.bullit.digital/kbase/sites/4/20221122132331/foto-Matthijs-150x150.jpg)
Matthijs Boersema
Rijkswaterstaat
![](https://cdn.bullit.digital/kbase/sites/4/20220615101156/Mohammad-Kifayath-Chowdhury-150x150.jpg)
Mohammad Kifayath Chowdhury
TU Delft
![](https://cdn.bullit.digital/kbase/sites/4/20220518114530/foto-Ralph-150x150.jpg)
dr. Ralph Schielen
Rijkswaterstaat
![](https://cdn.bullit.digital/kbase/sites/4/20221024111301/stanfordwilson-150x150.jpg)
Stanford Wilson
Rijkswaterstaat
![](https://cdn.bullit.digital/kbase/sites/4/20220923131700/Suleyman-Naqshband.jpg)
Suleyman naqshband
Wageningen University & Research
Prof. dr. S.J.M.H. Hulscher
![](https://cdn.bullit.digital/kbase/sites/4/20220602113002/Tatjana-Edler-150x150.jpg)
Tatjana Edler
Universiteit Utrecht
![](https://cdn.bullit.digital/kbase/sites/4/20220923132308/ton-hoitink-150x150.jpg)
Prof. dr. ir. Ton Hoitink
Wageningen University & Research
![](https://cdn.bullit.digital/kbase/sites/4/20221122134606/Victor-Chavarrias-125x150.jpg)
Victor Chavarrias
![](https://cdn.bullit.digital/kbase/sites/4/20221205120933/wilfried-150x150.jpg)
Wilfried ten Brinke
![](https://cdn.bullit.digital/kbase/sites/4/20230822135624/wybren-e1692705457662-150x150.jpg)
Wybren de Jong
Rijkswaterstaat
Project outputs
Mitigation of Channel Bed Erosion through Floodplain Lowering and Nourishments
![](https://cdn.bullit.digital/kbase/sites/4/20240324155457/NCR2024.png)
Centennial Channel Response to Climate Change in an Engineered River
Synthese Rivers2Morrow
![](https://cdn.bullit.digital/kbase/sites/4/20221005110337/Logo-R2M_klein_RGB_v02.png)
In dit synthese rapport is meer informatie te vinden over het Rivers2Morrow Programma en de bijbehorende projecten.
27/06/2022 by Wybren de Jong
Bevat: Algemene Informatie Rivers2Morrow
Ylla Arbós, C., Schielen, R., Blom, A. (2019). Response of the upper Rhine-Meuse Delta to
climate change and sea-level rise. NCR Days 2019 (p. 116-117). Utrecht.
Ylla Arbós, C., Blom, A., van Vuren, S., & Schielen, R.M.J. (2019). Bed level change in
the upper Rhine Delta since 1926 and rough extrapolation to 2050. Research report. Delft
University of Technology. Delft.
Ylla Arbós, C., Soci, F., Schielen, R., Blom, A. (2019). Aggradation and degradation in the
upper Rhine-Meuse delta in response to climate change. RCEM 2019. Auckland.
Ylla Arbós, C., Schielen, R., Blom, A. (2020). Bed level change in the Upper Rhine Delta
between 1926-2018. Nijmegen.
Ylla Arbós, C., Blom, A., Acevedo Goldaracena, F., van Vuren, S., Schielen, R.M.J. (2020)
Bed level change in the Upper Rhine Delta and Niederrhein. River Flow2020. Delft.
Ylla Arbós, C., Blom, A., Viparelli, E., Reneerkens, M., Frings, R.M., Schielen, R.M.J. (2021). Slope increase and gravel front fading in an incising river. Geophysical Research Letters.
Ylla Arbós, C., Blom, A., Schielen, R.M.J. (2021). Scenarios for Controls of River Response
to Climate Change in the Lower Rhine River. NCR Days 2021.
Ylla Arbós, C., Blom, A., Schielen, R.M.J. (2021). Channel Response of the Lower Rhine
River to Climate Change and Human Intervention over the 21st Century. AGU Fall Meeting
2021, New Orleans.
Ylla Arbós, C., Blom, A., Schielen, R.M.J. (2022). Mid-Century Channel Response to Climate Change in the Lower Rhine River. NCR Days 2022, Delft.
Ylla Arbós, C., Blom, A., Schielen, R.M.J. (2022). Response of the lower Rhine River to
climate change over the period 2010-2050. Proceedings of the River Flow Conference 2022
(submitted).
Nieuws
“We willen het systeem op een natuurlijke manier robuust en klimaatbestendig te maken.”
08/08/2023 door dr. Ralph Schielen
Ralph Schielen (Rijkswaterstaat) heeft ongeveer vijf jaar geleden Rivers2Morrow binnen Rijkswaterstaat in gang gezet. Op het gebied van beheer en beleid van de Nederlandse...