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Schrijvershof, R. A. (author), van Maren, D.S. (author), Torfs, P. J. J. F. (author), Hoitink, A. J. F. (author)Existing tidal input reduction approaches applied in accelerated morphodynamic simulations aim to capture the dominant tidal forces in a single or double representative tidal cycle, often referred to as a “morphological tide.” These strongly simplified tidal signals fail to represent the tidal extremes and hence poorly allow to represent...journal article 2023
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Ribas, Francesca (author), Portos-Amill, Laura (author), Falqués, Albert (author), Arriaga, Jaime (author), Marcos, Marta (author), Ruessink, Gerben (author)Mean sea-level rise (MSLR) will induce shoreline recession, increasing the stress on coastal systems of high socio-economic and environmental values. Localized mega-nourishments are meant to alleviate erosion problems by diffusing alongshore over decades and thus feeding adjacent beaches. The 21-st century morphological evolution of the...journal article 2023
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Kranenborg, Joost W.M. (author), Campmans, Geert H.P. (author), Jacobsen, Niels G. (author), van der Werf, Jebbe J. (author), Reniers, A.J.H.M. (author), Hulscher, Suzanne J.M.H. (author)We present a fully coupled 2DV morphodynamic model, implemented in OpenFOAM<sup>®</sup> that is capable of simulating swash-zone morphodynamics of sandy beaches. The hydrodynamics are described by the Reynolds-averaged Navier–Stokes (RANS) equations with a (Formula presented.) turbulence model and the Volume of Fluid (VoF) approach for...journal article 2022
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Mathew, R. (author), Winterwerp, J.C. (author)Sediment mobility and memory effects distinguish transport and morphodynamics in fine sediment settings from sandy settings. This paper focuses on the morphodynamic modeling of fine sediment systems, and an adaptation of modeling procedures more commonly used in sand-dominated systems. An extensive dataset of short-term transport and...journal article 2022
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Paudel, Sandesh (author), Singh, Umesh (author), Crosato, A. (author), Franca, M.J. (author)Assuming that the equilibrium geometry of river channels does not depend on their initial state but solely on boundary conditions, several formulas have been derived that relate the channel depth and width to the river bankfull discharge and bed material. However, due to the existence of a threshold for sediment motion and the strong non...journal article 2022
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Guo, Leicheng (author), Zhu, C. (author), Xu, Fan (author), Xie, Weiming (author), van der Wegen, Mick (author), Townend, Ian (author), Wang, Zhengbing (author), He, Qing (author)Reclamation of low-lying tidal flats and floodplains adjacent to present shorelines has been implemented worldwide for both coastal defense and development. While it is technically feasible to monitor the short-term impact of tidal flat embankments, it is challenging to identify long-term and cumulative morphodynamic impact, particularly...journal article 2022
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Luijendijk, Arjen (author)A common measure to mitigate erosion along sandy beaches is the implementation of sand nourishments. The design and societal acceptance of such a soft mitigation measure demands information on the expected evolution at various time scales ranging from a storm event to multiple decades. Process-based morphodynamic models are increasingly applied...journal article 2021
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Zheng, J. (author), Elmilady, H.M.S.M.A. (author), Röbke, B. R. (author), Taal, M. (author), Wang, Zhengbing (author), van Prooijen, Bram (author), de Vet, P.L.M. (author), van der Wegen, M. (author)Intertidal shoals are pronounced morphological features found in many estuaries worldwide. Apart from maintaining an ecologically unique intertidal environment, shoals also protect adjacent dyke systems by attenuating waves. The fate of sandy shoals under anticipated sea level rise (SLR) scenarios is underexplored. The current research...journal article 2021
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Guo, Leicheng (author), Xu, Fan (author), van der Wegen, Mick (author), Townend, Ian (author), Wang, Zhengbing (author), He, Qing (author)Global climate changes have accelerated sea-level rise (SLR), which exacerbates the risks of coastal flooding and erosion. It is of practical interest to understand the long-term hydro-morphodynamic adaptation of coastal systems to SLR at a century time scale. In this work we use a numerical model to explore morphodynamic evolution of a...journal article 2021
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Morphodynamic modeling the impact of large-scale embankment on the large bar in a convergent estuaryXie, Dongfeng (author), Wang, Zhengbing (author), van der Wegen, Mick (author), Huang, Junbao (author)Many alluvial estuaries worldwide include an inside bar system, a large sediment deposit deeply stretched into the estuary. A good example of such a system is the large sediment deposit in the Qiantang Estuary, China. Its length and height reach 130 km and 10 m, respectively. Bathymetrical comparison reveals that the large bar has moved seaward...journal article 2021
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Bosboom, J. (author)This thesis investigates the behaviour of the often used point-wise skill score, the MSESSini a.k.a. BSS, and develops new error metrics that, as opposed to point-wise metrics, take the spatial structure of morphological patterns into account. The...doctoral thesis 2020
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Wang, Zhengbing (author), Townend, Ian (author), Stive, M.J.F. (author)Aggregation is used to represent the real world in a model at an appropriate level of abstraction. We used the convection-diffusion equation to<br/>examine the implications of aggregation progressing from a three-dimensional (3D) spatial description to a model representing a system as a<br/>single box that exchanges sediment with the adjacent...journal article 2020
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Bosboom, J. (author), Mol, M. (author), Reniers, A.J.H.M. (author), Stive, M.J.F. (author), de Valk, C. F. (author)Although commonly used for the validation of morphological predictions, point-wise accuracy metrics, such as the root-mean-squared error (RMSE), are not well suited to demonstrate the quality of a high-variability prediction; in the presence of (often inevitable) location errors, the comparison of depth values per grid point tends to favour...journal article 2020
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Morphodynamic acceleration techniques for multi-timescale predictions of complex sandy interventionsLuijendijk, Arjen (author), de Schipper, M.A. (author), Ranasinghe, Roshanka (author)Thirty one percent (31%) of the world's coastline consists of sandy beaches and dunes that form a natural defense protecting the hinterland from flooding. A common measure to mitigate erosion along sandy beaches is the implementation of sand nourishments. The design and acceptance of such a mitigating measure require information on the expected...journal article 2019
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Tao, Jianfeng (author), Wang, Zhengbing (author), Zhou, Zeng (author), Xu, Fan (author), Zhang, Changkuan (author), Stive, M.J.F. (author)The radial sand ridges (denoted as “RSRs” hereafter) in the Southern Yellow Sea, China, are morphologically striking because of the remarkable size and radial planar orientation, standing out as a unique coastal geomorphology among the worldwide sand ridge systems. The formation of this giant fan‐shaped geomorphic feature requires delicate...journal article 2019
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Singh, Umesh (author), Crosato, A. (author), Giri, Sanjay (author), Hicks, Murray (author)The effects of sediment heterogeneity and sediment mobility on the morphology of braided rivers are still poorly studied, especially when the partial sediment mobility occurs. Nevertheless, increasing the bed sediment heterogeneity by coarse sediment supply is becoming a common practice in river restoration projects and habitat improvement...journal article 2017
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Li, W. (author), Su, Zhenghua (author), van Maren, D.S. (author), Wang, Zhengbing (author), de Vriend, H.J. (author)The downstream peak discharge increase during hyperconcentrated floods in the Yellow River has been attributed to bed erosion, roughness reduction and floodplain effects. While great improvements have been made on the nderstandings of the roles of bed erosion and roughness reduction, the effects of floodplain remain poorly understood. Here, as a...journal article 2017
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van Denderen, R. Pepijn (author), Schielen, R.M.J. (author), Blom, A. (author), Hulscher, Suzanne J.M.H. (author), Kleinhans, Maarten G. (author)Side channel construction is a common intervention applied to increase a river's conveyance capacity and to increase its ecological value. Past modelling efforts suggest two mechanisms affecting the morphodynamic change of a side channel: (1) a difference in channel slope between the side channel and the main channel and (2) bend flow just...journal article 2017
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Walstra, D.J.R. (author)Nearshore sandbars have a lifetime of many years, during which they exhibit cyclic, offshore directed behaviour with strong alongshore coherence. A bar is generated near the shoreline and grows in height and width while migrating offshore, before finally decaying at the seaward limit of the surf zone. It may take 10 to 15 years for a bar to...doctoral thesis 2016
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Walstra, D.J.R. (author), Wesselman, Daan (author), van der Deyl, Eveline (author), Ruessink, BG (author)Inter-annual bar dynamics may vary considerably across sites with very similar environmental settings. In particular, the variability of the bar cycle return period (Tr) may differ by a factor of 3 to 4. To date, data studies are only partially successful in explaining differences in Tr, establishing at best weak correlations to local...journal article 2016