Research Outputs

Our aim is to provide modelers of river morphodynamics with the mathematical tools to detect the occurrence of ill-posedness in their results.

13/02/2018 by Victor Chavarrias et al.

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River discharge fluctuations cause bed-level variations at various scales, resulting from spatial gradients in the river’s geometry. Insight into these bed-level variations and their relation to discharge fluctuations can help to predict and prevent the formation of local bottlenecks. In this paper, we use bi-weekly bed-level measurements of the river Waal to estimate the bed-level variations related to the river discharge.

11/02/2021 by Pepijn van Denderen et al.

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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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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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We identified at a plot scale the seasonal changes in the terrain, vegetation height, and greenness in a simple way.

30/04/2018 by Wimala van Iersel et al.

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Residual biomass from landscape management can contribute to both greenhouse gas benefits and burdens, depending on the application.

15/06/2026 by Swinda Pfau

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We show the biodiversity recovery from 15 years flood risk adaptation that consider nature requirements building a spatial extension to calculate biodiversity scores.

08/11/2017 by Menno Straatsma et al.

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Human interventions can result in changes in the equilibrium profile of rivers. It is difficult to identify the bed level changes that result from river interventions due to the various causes of bed level changes. Using wavelet filtering, we are able to isolate the effect of river interventions based on the length scale over which they occur. The method presented here can aid in verifying model results. In addition, it can be used to estimate bed level changes that occur over various spatial scales.

13/02/2020 by Pepijn van Denderen et al.

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Using residual biomass, such as grass and wood chips, as a resource instead of treating it as waste is not automatically more sustainable.

20/12/2018 by Swinda Pfau et al.

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30/01/2017 by Jan Fliervoet et al.

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