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A Rapid Method for Modeling Transient River Response Under Stochastic Controls With Applications to Sea Level Rise and Sediment Nourishment

Liselot Arkesteijn , Astrid Blom, and Robert Jan Labeur - 19/01/2022 - RiverCare
We exploit the distinction between the two temporal scales to model the transient (so time-dependent) phase of channel response, which is the phase wherein the channel approaches its new equilibrium. We show that: (a) besides channel slope, also the bed surface texture cannot keep pace with short-term fluctuations of the controls, and (b) mean transient channel response is determined by the probability distributions of the controls (e.g., flow duration curve rather than flow rate sequence).

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Hydrodynamic modelling of wave overtopping over a block-covered flood defence

Barendse, L.; van Bergeijk, V.M.; Chen, W.; Warmink, J.J.; Mughal, A.; Hill, D.; Hulscher, S.J.M.H. - 10/01/2022 - All-Risk
This new model developed in OpenFOAM simulates the wave forces, such as the pressure and the shear stress, on the entire dike profile from the waterside slope to the landward toe. The model can be used to study different designs and locations of the blocks leading to the safest design of the flood defence.

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Barendse, L.; van Bergeijk, V.M.; Chen, W.; Warmink, J.J.; Mughal, A.; Hill, D.; Hulscher, S.J.M.H. - 10/01/2022 - All-Risk
Dit nieuwe model ontwikkeld in OpenFoam simuleert de krachten van de golven, zoals de druk en de schuifspanning, langs het hele dijkprofiel over het buitentalud, de kruin tot aan de binnen teen. Het model kan gebruikt worden om verschillende ontwerpen en locaties van de blokken te bestuderen om tot het beste ontwerp van de dijk te komen.

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Flooding and Management of Large Fluvial Lowlands: A Global Environmental Perspective

Paul F. Hudson - 17/12/2021
Cambridge University Press, 348 pp.

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Geological framework for assessing variability in subsurface piping parameters underneath dikes in the Rhine-Meuse delta, the Netherlands

T.G. Winkels, K.M. Cohen, S.M. Knaake, H. Middelkoop, E. Stouthamer - 05/12/2021 - All-Risk
Stroomafwaartse verfijning van D50 dekzandwaarden wordt veroorzaakt door dalingen in het specifieke stroomvermogen. Sedimentvererving, door omwerking van pre-deltaïsch zand, veroorzaakt lokale variaties in D50 topzandwaarden.

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Geological framework for assessing variability in subsurface piping parameters underneath dikes in the Rhine-Meuse delta, the Netherlands

T.G. Winkels, K.M. Cohen, S.M. Knaake, H. Middelkoop, E. Stouthamer - 05/12/2021 - All-Risk
Downstream fining of D50 top sand values is caused by drops in specific stream power. Sediment inheritance, through reworking of pre-deltaic sands causes local variations in D50 top sand values.

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Modelling Regime Changes of Dunes to Upper-Stage Plane Bed in Flumes and in Rivers

Olav J. M. van Duin, Suzanne J. M. H. Hulscher and Jan S. Ribberink - 26/11/2021
Applied Sciences

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Initiating and upscaling mussel reef establishment with life cycle informed restoration: Successes and future challenges

Temmink, R.J.M., Fivash, G.S., Govers, L. L., Nauta J., Marin-Diaz, B., Cruijsen, P.P.M.J.M., Reijers V.C., Didderen, K., Penning, E., Olff, H., Heusinkveld, J.H.T., Lamers L.P.M., Lengkeek, W., Christianen, M.J.A., Bouma, T. J. & van der Heide, T., - 25/11/2021 - All-Risk
Life cycle informed restoration enhances mussel bed formation. However, mussel biomass depends on sediment burial. Larger-scale processes resulted in partial burial of the structures. Therefore, optimisation of the structures is required to overcome technical failure at exposed sites.

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Initiating and upscaling mussel reef establishment with life cycle informed restoration: Successes and future challenges

Temmink, R.J.M., Fivash, G.S., Govers, L. L., Nauta J., Marin-Diaz, B., Cruijsen, P.P.M.J.M., Reijers V.C., Didderen, K., Penning, E., Olff, H., Heusinkveld, J.H.T., Lamers L.P.M., Lengkeek, W., Christianen, M.J.A., Bouma, T. J. & van der Heide, T., - 25/11/2021 - All-Risk
Life cycle informed restoration enhances mussel bed formation. However, mussel biomass depends on sediment burial. Larger-scale processes resulted in partial burial of the structures. Therefore, optimisation of the structures is required to overcome technical failure at exposed sites.

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Numerical investigation of the effects of roughness, a berm and oblique waves on wave overtopping processes at dikes

Chen, W., Warmink, J. J., van Gent, M. R. A., & Hulscher, S. J. M. H. - 24/11/2021 - All-Risk
Introducing a roughness factor to existing empirical formulas leads to better estimates of the flow charac-teristics. We found that the flow characteristics are more sensitive to the variation of the berm width than to the berm level. In order to take oblique waves into account, the 2D numerical model is extended into the 3D model domain. The numerical model computa-tions confirm that the reductive influence factor of oblique waves is dependant on the berm width.

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