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Combining river interventions to mitigate bed degradation in the Boven-Waal

Brink, R.M. ten (2024) Combining river interventions to mitigate bed degradation in the Boven-Waal.

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Abstract:The ongoing bed degradation in the Dutch Rhine delta hinders the achievement of goals set for the river areas within the Integrated River Management (IRM) programme. The Boven-Waal is currently the fastest degrading river branch, while also exerting a large influence on the discharge distribution at the Pannerdensche Kop, necessitating prompt intervention. Currently the potential of combining different river interventions to mitigate long-term bed degradation is underexplored. This research quantifies the effects of implementing different combinations of groyne lowering, longitudinal training dams and side channels with summer dike lowering in the Boven-Waal, on the mitigation of ongoing long-term bed degradation and its consequences. In order to achieve this, different combinations of river interventions have been schematized and simulated with the 2D ’Duurzame Vaardiepte Rijndelta’ (DVR) model. The results indicate that the connection of lower lying areas in the floodplains of the meandering Boven-Waal via side channels, is unlikely to effectively mitigate ongoing bed degradation, due to limited space in the floodplains and the considerable amount of sediment that is deposited in the side channels. Instead, a combination of groyne lowering and longitudinal training dams in the Boven-Waal is identified as most effective for mitigating ongoing bed degradation.
Item Type:Essay (Master)
Clients:
Royal HaskoningDHV, Nijmegen, the Netherlands
Rijkswaterstaat, the Netherlands
Faculty:ET: Engineering Technology
Subject:56 civil engineering
Programme:Civil Engineering and Management MSc (60026)
Link to this item:https://purl.utwente.nl/essays/100635
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