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NCR DAYS 2025 – Crossing boundaries

Chavarrias & Van den Hoek - 2025 - Publications
NCR Days Book of Abstracts 2025
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Accuracy Assessment of Numerical Morphological Models Based on Reduced Saint-Venant Equations

H. J. Barneveld, E. Mosselman, V. Chavarrías, A. J. F. Hoitink - 18/12/2023 - Rivers2Morrow
In this paper we investigate under which conditions numerical morphological models can be simplified to speed up simulations, and still provide accurate predictions of riverbed dynamics. We show that popular simplified models based on the quasi-steady approach are highly accurate for Froude numbers up to 0.7, probably even for long river reaches with large flood wave damping. We provide diagrams (see example below) for assessing the accuracy of simplified models (quasi-steady and diffusive wave) for various combinations of Froude number, sediment transport and dimensions of riverbed waves.

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The Effect of Sediment Transport Models on Simulating River Dune Dynamics

L. R. Lokin, J. J. Warmink, and S. J. M. H. Hulscher - 04/12/2023 - Rivers2Morrow

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The Effect of Sediment Transport Models on Simulating River Dune Dynamics

L. R. Lokin, J. J. Warmink, and S. J. M. H. Hulscher - 04/12/2023 - Rivers2Morrow

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Semicentennial Response of a Bifurcation Region in an Engineered River to Peak Flows and Human Interventions

14/04/2023 - Rivers2Morrow

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Semicentennial Response of a Bifurcation Region in an Engineered River to Peak Flows and Human Interventions

14/04/2023 - Rivers2Morrow

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Centennial Channel Response to Climate Change in an Engineered River

12/04/2023 - Rivers2Morrow

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Centennial Channel Response to Climate Change in an Engineered River

12/04/2023 - Rivers2Morrow

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Saved or starved? The importance of sediment management in determining the future response of estuaries and deltas.

09/03/2023 - Rivers2Morrow
The thesis of Jana Cox, discussing the importance of sediment management in determining the future response of estuaries and deltas.

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Can Linear Stability Analyses Predict the Development of Riverbed Waves With Lengths Much Larger Than the Water Depth?

03/03/2023 - Rivers2Morrow
In this paper we evaluate the use of analytical relations, based on linear stability analyses of the St. Venant-Exner equations, as rapid assessment tool for migration and damping of large riverbed waves. Supported by numerical simulations with a 1-D numerical model (markers in chart below) we prove that for Froude numbers ≤ 0.3 the results from linear stability analysis are valid for predicting the propagation of low riverbed waves. For larger Froude numbers riverbed waves are more diffusive and migrate slower in time than predicted from linear stability analysis.

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Shorter estuarine dunes and upstream migration due to intratidal variations in stratification

W.M. van der Sande, P.C. Roos, T. Gerkema, S.J.M.H. Hulscher - 01/02/2023 - SALTISolutions

Subsite estuarine dunes morphodynamic modeling Strain-Induced Periodic Stratification (SIPS)

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