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Flash Floods In The Geul Catchment : To What Extent Could Potential Mitigation Measures In the Boven Geuldal Belgium Reduce The Effects?

Kuiper, J.F. (2023) Flash Floods In The Geul Catchment : To What Extent Could Potential Mitigation Measures In the Boven Geuldal Belgium Reduce The Effects?

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Abstract:This study analyses a part of the flash floods that took place in July 2021 in the Netherlands, Belgium and Germany. The research aim is to analyse to what extent potential flood mitigation measures in the Boven Geuldal Belgium, a relatively large contributor to the flood wave of the Geul catchment, could reduce the outflow to the Geul while also addressing local flooding problems. Different scenarios have been carried out with an OpenLISEM schematization that has been calibrated to the event. The calibrated Reference Scenario shows that the dominant overland flow mechanism is Saturated Overland Flow, which leads to significant runoff across all LULC classes. This explains the high outflow percentage from this sub-catchment (48%). Different Dam Strategies have been proposed that consist of multiple small dams across the river floodplain including a culvert that allows a certain maximum discharge. They aim to reduce the peak outflow of the Boven Geul by delaying and storing excess discharge at several locations along the channel where it poses minimal to no harm. The model simulations show promising results, especially for the strategy including 7 small dams, which reduces the peak discharge from 59.9 m3/s to 36.2 m3/s.
Item Type:Essay (Master)
Faculty:ITC: Faculty of Geo-information Science and Earth Observation
Subject:38 earth sciences, 56 civil engineering
Programme:Spatial Engineering MSc (60962)
Link to this item:https://purl.utwente.nl/essays/98722
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