Searched for: subject:"Tidal%5C+asymmetry"
(1 - 19 of 19)
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Guo, Leicheng (author), Wang, Z.B. (author), Townend, Ian (author), He, Qing (author)
Tidal wave deformation and tidal asymmetry widely occur in tidal estuaries and lagoons. Tidal asymmetry has been intensively studied because of its controlling role on residual sediment transport and large‐scale morphological evolution. There are several methods available to characterize tidal asymmetry prompting the need for an overview of...
journal article 2019
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Wang, Zhengbing (author), Vandenbruwaene, Wouter (author), Taal, Marcel (author), Winterwerp, J.C. (author)
The records ofHWand LWin the most upper part of the Scheldt Estuary since 1971 have been analysed together with the daily river discharge. The tidal range, the hydraulic head and the ratio between the rising tide period to falling tide period have been determined for investigating the tidal amplification, the water surface slope along the river...
journal article 2019
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Zhou, Zeng (author), Coco, Giovanni (author), Townend, Ian (author), Gong, Zheng (author), Wang, Z.B. (author), Zhang, Changkuan (author)
Simple stability relationships are practically useful to provide a rapid assessment of coastal and estuarine landforms in response to human interventions and long‐term climate change. In this contribution, we review a variety of simple stability relationships which are based on the analysis of tidal asymmetry (shortened to “TA”). Most of the...
journal article 2018
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Xie, Dongfeng (author), Pan, Cunhong (author), Wu, Xiuguang (author), Gao, Shu (author), Wang, Zhengbing (author)
We investigate the morphological responses of the Hangzhou Bay, China, located immediately south of the Changjiang Estuary, to the drastic reduction of the sediment load from the Changjiang River and the large-scale coastal embankment schemes over past decades. The spatial patterns of deposition and erosion, sediment volume changes, and the...
journal article 2017
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Winterwerp, J.C. (author), Vroom, J (author), Wang, Zhengbing (author), Krebs, Martin (author), Hendriks, H.C.M. (author), van Maren, D.S. (author), Schrottke, Kerstin (author), Borgsmüller, Christine (author), Schöl, Andreas (author)
In this paper, we analyse the behaviour of fine sediments in the hyper-turbid Lower Ems River, with focus on the river’s upper reaches, a stretch of about 25 km up-estuary of Terborg. Our analysis is based on long records of suspended particulate matter (SPM) from optical backscatter (OBS) measurements close to the bed at seven stations along...
journal article 2017
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Gatto, V.M. (author), van Prooijen, B.C. (author), Wang, Z.B. (author)
Net sediment transport in tidal basins is a subtle imbalance between large fluxes produced by the flood/ebb alternation. The imbalance arises from several mechanisms of suspended transport. Lag effects and tidal asymmetries are regarded as dominant, but defined in different frames of reference (Lagrangian and Eulerian, respectively). A...
journal article 2017
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Winterwerp, J.C. (author), Vroom, J. (author), Wang, Zhengbing (author), Krebs, Martin (author)
abstract 2016
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Van der Leer, N.A. (author)
In the last century, various tidal rivers in Europe have seen a large tidal amplication, which is believed to be caused by the deepening and channelization of these rivers. Additionally, large increases in suspended sediment concentrations induced by flood dominance are thought to have decreased the effective hydraulic drag, enhancing further...
master thesis 2015
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Van Maren, D.S. (author), Winterwerp, J.C. (author), Vroom, J. (author)
Deepening of estuarine tidal channels often leads to tidal amplification and increasing fine sediment import. Increasing fine sediment import, in turn, may lower the hydraulic drag (due to a smoother muddy bed and/or sediment-induced damping of turbulence), and therefore, further strengthen tidal amplification, setting in motion a process in...
journal article 2015
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Guo, L.C. (author)
Estuarine morphodynamics are of broad importance to estuaries’ functions related to navigation, human settlement and ecosystems. Inspired by the Yangtze River estuary (YRE), this study aims to explore the impact of river discharge, tides and their interaction on long-term estuarine morphodynamics. Use is made of 1D and 2D process-based models....
doctoral thesis 2014
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Burchard, H. (author), Schulz, E. (author), Schuttelaars, H.M. (author)
Estuarine convergence (landward reduction of width and/or depth) is known to have the potential to significantly enhance estuarine circulation, a result theoretically derived under the assumption of constant eddy viscosity. Recent studies of longitudinally uniform energetic tidal channels indicate that tidal straining, a process driven by...
journal article 2014
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De Bruijn, R.A. (author)
After the storm surge of 1953, the Dutch Delta project was initiated in order to protect the southwestern part of The Netherlands. A storm surge barrier in front of the Oosterschelde and various dams at the back of the estuary were constructed. These interventions led to a large change of the hydrodynamics of the Oosterschelde: a large decrease...
master thesis 2012
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Vroom, J. (author), Elias, E. (author), Lescinski, J. (author), Wang, Z.B. (author)
Large hydrodynamic and morphodynamic changes have taken place in the western Dutch Wadden Sea due to the closure of the Zuider Sea in the early 1930s. Hydrodynamic simulations for three situations, viz. just before the closure, just after the closure and at present, have been carried out in order to investigate the hydrodynamic changes since the...
conference paper 2012
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De Pater, P.D. (author)
The research objective of this thesis is to determine the new hydrodynamic and morphodynamic situation in case the Oosterschelde storm surge barrier is removed, with emphasis on the development of the intertidal area. To reach the objectives of this study a literature study is performed which describes the impact of the Deltaworks. An analytical...
master thesis 2012
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Simoons, E. (author)
Wind energy has experienced an enormous growth in the last years and is becoming more and more popular as an alternative for conventional power. Large growth numbers are also expected for the coming years, for onshore as well as for offshore wind energy. Currently, a wind power capacity of almost 4 GW is installed offshore in the European Union,...
master thesis 2012
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Winterwerp, J.C. (author)
This paper describes an analysis of the observed up-river transport of fine sediments in the Ems River, Germany/Netherlands, using a 1DV POINT MODEL, accounting for turbulence-induced flocculation and sediment-induced buoyancy destruction. From this analysis, it is inferred that the net up-river transport is mainly due to an asymmetry in...
journal article 2010
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Chernetsky, A.S. (author), Schuttelaars, H.M. (author), Talke, S.A. (author)
Over decades and centuries, the mean depth of estuaries changes due to sea-level rise, land subsidence, infilling, and dredging projects. These processes produce changes in relative roughness (friction) and mixing, resulting in fundamental changes in the characteristics of the horizontal (velocity) and vertical tides (sea surface elevation) and...
journal article 2010
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Dian Zoelaeha, B. (author)
The objective of this study is to determine large scale of fine sediment transport near coral reefs islands in the Singapore Strait. Coral reefs in the Singapore Strait face great pressure due to high sedimentation and turbidity, which cause decreasing of light penetration and of environment quality for the coral growth. Sedimentation and high...
master thesis 2010
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Wang, Z.B. (author), Jeuken, C. (author), De Vriend, H.J. (author)
Theoretical study on tidal asymmetry and application to the Westerschelde estuary.
report 1999
Searched for: subject:"Tidal%5C+asymmetry"
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