Found 41 Outputs - Page 1 of 5
Explaining artificial side channel dynamics using data analysis and model calculations
We studied in detail the development of a side channel in the river Waal. A more frequently flowing side channel results in lower aggradation or sedimentation.
15/02/2018 by Pepijn van Denderen et al.
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Morphodynamic assessment of side channel systems using a simple one-dimensional bifurcation model and a comparison with aerial images
To aid the future design and maintenance, a set of diagrams allow to estimate both the equilibrium state and the time that takes for the bed load of the main channel to aggrade or deposit in the side channel.
05/12/2017 by Pepijn van Denderen et al.
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Flood hazard reduction from automatically applied landscaping measures in RiverScape
Seven flood reduction measures along the Waal river were ranked according to the water level reduction and the displaced material for their implementation.
01/03/2018 by Menno Straatsma et al.
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Exploring place attachment and visions of nature, of water-based recreationists
Major river interventions can greatly affect stakeholders and their connection to the river landscape. We show how recreationists’ perceptions of nature and landscape influence their expectations about a pilot intervention in the Waal river.
16/01/2018 by Wessel Ganzevoort et al.
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Rivierbodemdynamiek meenemen in het ontwerp van maatregelen
In the Dutch Waal river, the bed topography of the navigational channel is measured bi-weekly. In a so-called TKI-project (cooperation between Rijkswaterstaat, HKV and Twente University) we use this data to link morphological changes to specific interventions in the river. This is not a straightforward as it may seem, because the morphological changes are the sum of small scale changes due to e.g. the presence of groynes, medium scale changes coming from the intervention and large scale changes coming from engineering measures in the (far) past to which the profile is still adjusting. A so-called wavelet analysis can be used to disentangle these different scales and enables us to focus only on the morphological changes due to the intervention. This improves river operations and maintenance and in the future also to facilitate the planning of new measures to minimize morphological impact.
01/10/2020 by Pepijn van Denderen et al.
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Efficient uncertainty quantification for impact analysis of human interventions in rivers
A novel method is presented to estimate model uncertainty with a reduced number of model evaluations.
14/06/2018 by Koen Berends et al.
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Absence of freshwater mussels in Europe in relation to climate-related environmental factors
A unique database was constructed on the sensitivities of all European freshwater bivalves in relation to environmental factors that are affected by global change.
23/05/2018 by Frank Collas et al.
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Low-hanging fruits in large-scale fluvial landscaping measures
We show that the multidimensional evaluation of river interventions in the Waal river opens up opportunities to discuss possible trade-offs.
19/09/2018 by Menno Straatsma et al.
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Oblique aggradation: a novel explanation for sinuosity of low‐energy streams in peat‐filled valley systems
We inform stream restoration in peat-filled valleys by looking at the relative position of the erodible material to explain the origin of the stream bends in the Drentsche Aa area.
07/12/2016 by Jasper Candel et al.
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Change from a laterally stable to meandering river – a reconstruction of the historical discharge
We show how the Overijsselse Vecht river changed from a laterally stable to a meandering river ca. 500 years ago and further developed a methodology to reconstruct the historical discharge.
31/08/2018 by Jasper Candel et al.
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