Searched for: author:"Uijttewaal"
(21 - 40 of 57)

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Radermacher, M. (author), De Wit, L. (author), Uijttewaal, W.S.J. (author), Winterwerp, J.C. (author)
When dredging in sensitive environments, efforts have to be made to limit the free dispersal of suspended fine sediment from the dredging spill. Especially the use of hanging silt curtains as an environmental mitigation measure is widespread. Despite frequent application, their ability to reduce turbidity levels through vertical diversion of...
journal article 2015
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Angel, J.A. (author), Gorte, B.G.H. (author), Vargas Luna, A. (author), Uijttewaal, W.S.J. (author)
Experimental work in river morphology has already become a key factor to assess and analyze physical and numerical models that describe bed-level evolution in channels (Paola et al, 2009). Different techniques could be used to measure bed topography in laboratories ranging from traditional to high-technology methods. In this work, the structured...
conference paper 2014
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Van de Sande, S.A.H. (author), Uijttewaal, W.S.J. (author), Verheij, H.J. (author)
Granular filters are used for protection against scour and erosion of base material. For a proper functioning it is necessary that at the interfaces between the filter structure, the subsoil and the water flowing above the filter structure no material will be transported. Different types of granular filters can be distinguished, this paper...
conference paper 2014
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Chen, X. (author), Hofland, B. (author), Altomare, C. (author), Uijttewaal, J.S.W. (author)
In this paper the impact process and mechanism of overtopping flow on a vertical wall on a dike crest are investigated by means of a series of physical model tests. A double-peaked force was recognized in a time series of an overtoping flow. Four stages were summarized for the whole overtopping flow impact process. An empirical relationship...
conference paper 2014
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Orru, C. (author), Chavarrias Borras, V. (author), Uijttewaal, W.S.J. (author), Blom, A. (author)
Measurements of spatial and temporal changes in the grain-size distribution of the bed surface and substrate are crucial to improving the modelling of sediment transport and associated grain-size selective processes. We present three complementary techniques to determine such variations in the grain-size distribution of the bed surface in sand...
journal article 2014
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Ali, S. (author), Uijttewaal, W.S.J. (author)
At high water stages, obstacles (submerged and particularly emerged vegetation) in the flood plains of a river contribute to the flow resistance and hamper the conveyance capacity. In particular the elevated vegetated parts are expected to play an important role. The objective of this research work is to determine the form drag due to vegetated...
journal article 2014
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Uijttewaal, W.S.J. (author)
journal article 2014
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Ottevanger, W. (author), Blanckaert, K. (author), Uijttewaal, W.S.J. (author), De Vriend, H.J. (author)
Reduced-order models remain essential tools for meander modeling, especially for processes at large length scales and long time scales, probabilistic simulations, rapid assessments, or when input data are scarce or uncertain. Present reduced-order meander models consider their dependent variables either as small-amplitude variations compared to...
journal article 2013
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Orru, C. (author), Eleftherakis, D. (author), Blom, A. (author), Snellen, M. (author), Uijttewaal, W.S.J. (author), Simons, D.G. (author)
Grain size changes in a river dominated by mixed sediment are the outcome of sedimentary grain sizeselective processes. Progress in the measurement techniques that define the spatial and temporal variation in grain size is necessary to provide new insights in this field. Techniques as image analysis and acoustic methods have emerged in the last...
conference paper 2013
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Vargas Luna, A. (author), Uijttewaal, W.S.J. (author), Crosato, A. (author), Tanczos, I.C. (author), De Vries, M. (author)
conference paper 2013
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Ali, S. (author), Uijttewaal, W.S.J. (author)
At high water stages obstacles in the flood plains of a river contribute to the flow resistance and hamper the conveyance capacity. In particular the elevated vegetated parts are expected to play an important role. The objective of this research work is to determine the form drag due to vegetated oblique weir-like obstacles. The experiments have...
journal article 2013
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Orru, C. (author), Blom, A. (author), Uijttewaal, W.S.J. (author)
journal article 2012
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Vargas Luna, A. (author), Crosato, A. (author), Uijttewaal, W.S.J. (author)
conference paper 2012
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Orru, C. (author), Blom, A. (author), Uijttewaal, W.S.J. (author)
conference paper 2012
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Chen, X. (author), Hassan, W. (author), Uijttewaal, W. (author), Verwaest, T. (author), Verhagen, H.J. (author), Suzuki, T. (author), Jonkman, S.N. (author)
Wide crested dike can reduce the kinetic energy of the overtopping wave and make the overtopping wave to flow back to the seaside. If a coastal town were built on or near a dike, the overtopping wave running on the dike crest generates the force which can affect the buildings located in its path. However, quantifying the hydrodynamic load on the...
conference paper 2012
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Crosato, A. (author), Desta, F.B. (author), Cornelisse, J. (author), Schuurman, F. (author), Uijttewaal, W.S.J. (author)
Migrating alternate bars form in alluvial channels as a result of morphodynamic instability. Extensive literature can be found on their origin and short-term development, but their long-term evolution has been poorly studied so far. In particular, it is not clear whether migrating bars eventually reach a (dynamic) equilibrium, as in previous...
journal article 2012
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Crosato, A. (author), Mosselman, E. (author), Desta, F.B. (author), Uijttewaal, W.S.J. (author)
journal article 2011
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Ali, S. (author), Uijttewaal, W.S.J. (author)
At high water stages obstacles in the floodplains of a river contribute to the flow resistance. In particular the elevated vegetated parts are expected to play an important role. The objective of this study is to estimate and parameterize the form drag due to vegetated oblique weir-like obstacles. An experimental study has been carried out in...
conference paper 2011
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Ali, S. (author), Uijttewaal, W.S.J. (author)
conference paper 2011
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Crosato, A. (author), Desta, F.B. (author), Cornelisse, J. (author), Uijttewaal, W.S.J. (author)
Migrating alternate bars form in alluvial channels as a result of morphodynamic instability. Extensive literature can be found on their origin and short-term development, but their long-term evolution has been poorly studied so far. In particular, it is not clear whether they eventually reach an equilibrium shape, since short-term experiments...
conference paper 2011
Searched for: author:"Uijttewaal"
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