document

Accuracy of Numerical Morphological Models based on Simplified Hydrodynamics

Barneveld, H.J. (author), Mosselman, E. (author), Chavarrías, V. (author), Hoitink, A.J.F. (author)

Sustainable river management often requires long-term morphological simulations. As the future is unknown, uncertainty needs to be accounted for, which may require probabilistic simulations covering a large parameter domain. Even for one-dimensional models, simulation times can be long. One of the acceleration strategies is simplification of...

abstract 2024

document

Accuracy Assessment of Numerical Morphological Models Based on Reduced Saint-Venant Equations

Barneveld, H.J. (author), Mosselman, E. (author), Chavarrías, V. (author), Hoitink, A.J.F. (author)

Sustainable river management often requires long-term morphological simulations. As the future is unknown, uncertainty needs to be accounted for, which may require probabilistic simulations covering a large parameter domain. Even for one-dimensional models, simulation times can be long. One of the acceleration strategies is simplification of...

journal article 2024

document

Assessment of the Accuracy of Numerical Morphological Models based on Reduced Saint-Venant Equations

Barneveld, Hermjan (author), Mosselman, E. (author), Chavarrías, Víctor (author), Hoitink, Ton (author)

Sustainable river management often requires long-term morphological simulations. As the future is unknown, uncertainty needs to be accounted for, which may require probabilistic simulations covering a large parameter domain. Even for one-dimensional models, simulation times can be long. One of the acceleration strategies is simplification of...

abstract 2024

document

Land Reclamation Controls on Estuarine Morphological Evolution

Schrijvershof, Reinier (author), van Maren, D.S. (author), van der Wegen, Mick (author), Hoitink, Ton (author)

The morphological configuration of estuaries and tidal basins influences future development because the channel-flat pattern and geometry control tidal dynamics and, as a result, residual sediment transport patterns. Large-scale human alteration of estuarine plan-form and channel dimensions, as a result of land reclamation, influences long-term...

abstract 2024

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Can linear stability analyses predict the development of riverbed waves with lengths much larger than the water depth?

Barneveld, H.J. (author), Mosselman, E. (author), Chavarrías, Víctor (author), Hoitink, A.J.F. (author)

Sustainable river management can be supported by models predicting long-term morphological developments. Even for one-dimensional morphological models, run times can be up to several days for simulations over multiple decades. Alternatively, analytical tools yield metrics that allow estimation of migration celerity and damping of bed waves,...

journal article 2023

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Tidal amplification and river capture in response to land reclamation in the Ganges-Brahmaputra delta

van Maren, D.S. (author), Beemster, J. G.W. (author), Wang, Zhengbing (author), Khan, Z. H. (author), Schrijvershof, R. A. (author), Hoitink, A. J.F. (author)

At a global scale, intertidal areas are being reclaimed for agriculture as well as urban expansion, imposing high human pressure on the coastal zone. The Ganges-Brahmaputra Delta (GBD) is an exponent of this development. In this delta, land reclamation accelerated in the 1960's to 1980's, when polders were constructed in areas subject to...

journal article 2023

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A Synthetic Spring-Neap Tidal Cycle for Long-Term Morphodynamic Models

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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Peak Water Levels Rise Less Than Mean Sea Level in Tidal Channels Subject to Depth Convergence by Deepening

Leuven, Jasper R.F.W. (author), Niesten, Iris (author), Huismans, Y. (author), Cox, Jana R. (author), Hulsen, Lamber (author), van der Kaaij, Theo (author), Hoitink, A. J.F. (Ton) (author)

Effects of sea-level rise (SLR) on future peak water levels in tidal deltas and estuaries are largely unknown, despite these areas being densely populated and at high risk of flooding. While the rates of SLR accelerate, many channels simultaneously experience channel deepening for navigation. With globally decreasing sediment supplies, most...

journal article 2023

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Land Reclamation Controls on an Estuarine Regime Shift from a Multichannel to Single Channel Configuration

Schrijvershof, R. A. (author), van Maren, D.S. (author), van der Wegen, M. (author), Hoitink, A.J.F. (author)

Deltaic intertidal areas disappear worldwide. This impacts delta morphology, because the extent and physiological character of the tidal floodplains control the tidal regime and, as a result, residual sediment transport patterns. Extensive reclamation of former tidal flats, effectively changing the ratio of channel volume to intertidal storage...

abstract 2023

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Tidal Response to Land Reclamation in Single- and Multichannel Estuarine Systems

Beemster, J.G.W. (author), van Maren, D.S. (author), Hoitink, A.J.F. (author)

Intertidal areas play a crucial role in controlling tidal hydrodynamics and morphodynamics in estuaries and tidal inlets. As a consequence, widespread land reclamation of the intertidal zone has led to alterations in tidal dynamics and the associated morphodynamics of estuaries worldwide. Comparatively little research has focussed on the impact...

abstract 2023

document

Drivers of residual sediment transport in a stratified estuarine channel

Niesten, I. (author), Hoitink, A.J.F. (author), Huismans, Y. (author)

The bed stability of an estuary is determined by the net import or export of sediment, which in turn is controlled by multiple processes. Apart from the upstream riverine sediment supply, the net sediment flux is largely controlled by tidal hydrodynamics and the associated sediment exchange with the sea. In general, flood dominance causes...

abstract 2023

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Tidal response to polder construction in the Pussur-Sibsa estuary

Beemster, Joris (author), van Maren, D.S. (author), Hoitink, A.J.F. (author)

conference paper 2022

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Influence of Wind on Subtidal Salt Intrusion and Stratification in Well-Mixed and Partially Stratified Estuaries

Jongbloed, Hendrik (author), Schuttelaars, H.M. (author), Dijkstra, Y.M. (author), Donkers, Paul B. (author), Hoitink, Antonius J.F. (author)

An idealized width-averaged model is employed to study the influence of wind stress on subtidal salt intrusion and stratification in well-mixed and partially stratified estuaries. We show that even in mild conditions, wind forcing can influence the estuarine salinity structure in a substantial way. By studying the role of wind forcing on...

journal article 2022

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Efficient long-term one-dimensional morphodynamic modelling in alluvial rivers using simplified models – theory and validation

Barneveld, Hermjan (author), Hoitink, Ton (author), Mosselman, E. (author), Chavarrias, V. (author)

abstract 2021

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Propagation of tides along a river with a sloping bed

Kästner, K. (author), Hoitink, A.J.F. (author), Torfs, P. J. J. F. (author), Deleersnijder, E.L.C. (author), Ningsih, N.S. (author)

Conceptually, tidal rivers are seen as narrow channels along which the cross-section geometry remains constant and the bed is horizontal. As tidal waves propagate along such a channel, they decrease exponentially in height. The more rapid the decrease, the stronger the river flow. Near the coast, the tidally averaged width and depth change...

journal article 2019

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Scale model of a training dam using lightweight granulates

Vermeulen, Bart (author), Boersema, Matthijs (author), Hoitink, Ton (author), Sieben, Arjan (author), Sloff, C.J. (author), Van Der Wal, Maarten (author)

Longitudinal training dams (LTDs) are a promising alternative for river groynes. Here we summarize findings of a recent study focused on the along river transition from a series of river groynes to an LTD, where the flow divides between the fairway and the side channel between the LTD and the river bank. A scale model is setup using...

journal article 2018

document

Electrified Soft Interface as a Selective Sensor for Cocaine Detection in Street Samples

Poltorak, L. (author), Eggink, I.M.A. (author), Hoitink, Marnix (author), Sudhölter, Ernst J. R. (author), de Puit, M. (author)

A straightforward, direct, and selective method is presented for electrochemical cocaine identification in street samples. The sensing mechanism is based on a simple ion transfer reaction across the polarized liquid-liquid interface. The interfacial behavior of a number of cutting agents is also reported. Interfacial miniaturization has led...

journal article 2018

document

Morphodynamic effects of riparian vegetation growth after stream restoration

Vargas Luna, A. (author), Crosato, A. (author), Anders, Niels (author), Hoitink, Antonius J.F. (author), Keesstra, Saskia D. (author), Uijttewaal, W.S.J. (author)

The prediction of the morphological evolution of renaturalized streams is important for the success of restoration projects. Riparian vegetation is a key component of the riverine landscape and is therefore essential for the natural rehabilitation of rivers. This complicates the design of morphological interventions, since riparian vegetation...

journal article 2018

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Tidal controls on river delta morphology

Hoitink, A.J.F. (author), Wang, Zhengbing (author), Vermeulen, B. (author), Huismans, Y (author), Kästner, K (author)

River delta degradation has been caused by extraction of natural resources, sediment retention by reservoirs, and sea-level rise. Despite global concerns about these issues, human activity in the world’s largest deltas intensifies. Harbour development, construction of flood defences, sand mining and land reclamation emerge as key contemporary...

journal article 2017

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Simulations of the flow in the Mahakam river–lake–delta system, Indonesia

Pham Van, Chien (author), de Brye, Benjamin (author), Deleersnijder, E.L.C. (author), Hoitink, A. J F (author), Sassi, Maximiliano (author), Spinewine, Benoit (author), Hidayat, Hidayat (author), Soares-Frazão, Sandra (author)

Large rivers often present a river–lake–delta system, with a wide range of temporal and spatial scales of the flow due to the combined effects of human activities and various natural factors, e.g., river discharge, tides, climatic variability, droughts, floods. Numerical models that allow for simulating the flow in these river–lake–delta...

journal article 2016