Searched for: author:"Uijttewaal, W.S.J."
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Truong, S. H. (author), Uijttewaal, W.S.J. (author)
In floodplains of vegetated channels, transverse exchange processes of mass and momentum are of primary importance as these are directly linked to the river bank stability, sedimentation, and nutrient transport. Despite its importance, knowledge about this phenomenon is still incomplete especially in the context of the presence of the large...
journal article 2019
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Haidari, A.H. (author), Heijman, Sebastiaan (author), Uijttewaal, W.S.J. (author), van der Meer, W.G.J. (author)
Feed spacer orientation affects the velocity pattern and pressure drop of spacer-filled channels such as those encountered in Spiral-wound Membrane (SWM) modules of Reverse Osmosis (RO). However, there are only limited numbers of experimental studies on this topic. This study sets out to reveal more detailed information on the pressure drop...
journal article 2019
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Wei, P. (author), Mudde, R.F. (author), Uijttewaal, W.S.J. (author), Spanjers, H. (author), van Lier, J.B. (author), de Kreuk, M.K. (author)
This study aimed to characterise the gas-liquid flow and mixing behaviour in a gas-mixed anaerobic digester by improving phase interaction modelling using Computational Fluid Dynamics (CFD). A 2D axisymmetric model validated with experimental data was set up using an Eulerian-Eulerian method. Uncertainty factors, including bubble size, phase...
journal article 2019
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Truong Hong, S. (author), Uijttewaal, W.S.J. (author), Stive, M.J.F. (author)
Mangrove forests along the Mekong delta estuaries are usually observed to degrade together with the increasing extension of fish farms. In this limited-width condition, the formation of coherent structures, their interactions with mangroves, the role of the width of the mangrove forest, and their effects on the exchange processes between the...
journal article 2019
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Gutierrez Marin, Juan Pablo (author), van Halem, D. (author), Uijttewaal, W.S.J. (author), del Risco, Efraín (author), Rietveld, L.C. (author)
As a consequence of the suspended sediments in river water, cake formation on the streambed and clogging of the aquifer may occur, leading to a decline in the production yield of riverbank filtration systems, particularly in highly turbid river waters. However, naturally occurring flow forces may induce sufficient scouring of the streambed,...
journal article 2018
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Chen, Hui (author), Ni, Yan (author), Li, Yulong (author), Liu, Xue-feng (author), Ou, Suying (author), Su, Min (author), Peng, Yisheng (author), Hu, Zhan (author), Uijttewaal, W.S.J. (author), Suzuki, T. (author)
), which are directly related to the wave damping capacity of a certain vegetated area. One major uncertainty is...
journal article 2018
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Oudenbroek, Kevin (author), Naderi, Nader (author), Bricker, J.D. (author), Yang, Y. (author), van der Veen, C. (author), Uijttewaal, W.S.J. (author), Moriguchi, Shuji (author), Jonkman, Sebastiaan N. (author)
In countries with steep rivers, such as Japan and the United States, bridges fail on an annual basis. Bridges on spread footings are especially susceptible to failure by hydrodynamic loading, often exacerbated by debris damming. Here, such failures are investigated via small scale model laboratory experiments and full scale numerical...
journal article 2018
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Duro, G. (author), Crosato, A. (author), Kleinhans, Maarten G. (author), Uijttewaal, W.S.J. (author)
We apply structure from motion (SfM) photogrammetry with imagery from an unmanned aerial vehicle (UAV) to measure bank erosion processes along a mid-sized river reach. This technique offers a unique set of characteristics compared to previously used methods to monitor banks, such as high resolution and relatively fast deployment in the field....
journal article 2018
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Wei, P. (author), Tan, Qiuman (author), Uijttewaal, W.S.J. (author), van Lier, J.B. (author), de Kreuk, M.K. (author)
For a proper operational performance assessment of excess sewage sludge digesters in practice, a better understanding of waste activated sludge (WAS) rheological behaviour is important, especially regarding the low-shear and poor mixing zones in anaerobic digesters. The potential rheological instability of WAS with different total solids (TS)...
journal article 2018
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Truong Hong, S. (author), Uijttewaal, W.S.J. (author)
Vegetation in general and mangrove, in particular, plays a significant role in the protection of the coastal and estuarine regions from erosion. In particular, estuarine mangrove forests can effciently reduce the impact of a strong along-bank flow during high tides and high river discharge, creating shelter regions for the development of the...
journal article 2018
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Vargas Luna, A. (author), Crosato, A. (author), Byishimo, P. (author), Uijttewaal, W.S.J. (author)
Alluvial rivers are shaped by sequences of water flows excavating their channels. Observations show that besides the magnitude, also the frequency and duration of streamflow oscillations might be important for the river channel formation. In addition, the river morphology appears influenced also by both size and degree of uniformity of the...
journal article 2018
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Duro, G. (author), Crosato, A. (author), Kleinhans, Maarten G. (author), Uijttewaal, W.S.J. (author)
In recent years, many riverbanks in Europe had their protections removed to reactivate natural erosion processes and improve riparian habitats. Yet, other river functions may be affected, such as navigation and flood conveyance. The quantification and prediction of erosion rates and volumes is then relevant to manage and control the integrity...
journal article 2018
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Vargas Luna, A. (author), Crosato, A. (author), Byishimo, P. (author), Uijttewaal, W.S.J. (author)
Alluvial rivers are shaped by sequences of water flows excavating their channels. Observations show that besides the magnitude, the frequency and duration of streamflow oscillations might also be important for the river channel formation. In addition, the river morphology appears influenced by both size and degree of uniformity of the...
journal article 2018
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Baar, A.W. (author), de Smit, Jaco (author), Uijttewaal, W.S.J. (author), Kleinhans, Maarten G. (author)
Large-scale morphology, in particular meander bend depth, bar dimensions, and bifurcation dynamics, are greatly affected by the deflection of sediment transport on transverse bed slopes due to gravity and by secondary flows. Overestimating the transverse bed slope effect in morphodynamic models leads to flattening of the morphology, while...
journal article 2018
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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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Le, T.B. (author), Crosato, A. (author), Uijttewaal, W.S.J. (author)
Rivers have been trained for centuries by channel narrowing and straightening. This caused important damages to their ecosystems, particularly around the bank areas. We analyse here the possibility to train rivers in a new way by subdividing their channel in main and ecological channel with a longitudinal training wall. The effectiveness of...
journal article 2018
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Broekema, Y.B. (author), Labeur, R.J. (author), Uijttewaal, W.S.J. (author)
Scour in the vicinity of a hydraulic structure may compromise its geotechnical stability or that of nearby structures. Much fundamental research has been dedicated to the understanding and prediction of these processes, in order to enable the efficient design of mitigation measures. While most of these efforts consider laterally uniform flows,...
journal article 2018
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Le, T.B. (author), Crosato, A. (author), Mosselman, E. (author), Uijttewaal, W.S.J. (author)
To maintain a navigable channel and improve high-flow conveyance, engineers have recently proposed constructing longitudinal training walls as an alternative to the traditional transverse groynes. However, previous work has shown that the system of parallel channels created by a longitudinal training wall might be unstable in rivers with...
journal article 2018
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Jammers, S.M.M. (author), Paarlberg, AJ (author), Mosselman, E. (author), Uijttewaal, W.S.J. (author)
Longitudinal training dams (LTDs) are  constructed in the River Waal in the  Netherlands. They are aligned parallel to the  river shore and divide the river into a main and  side channel. The existing groynes are  removed yielding more discharge capacity at  high flows. The side channel creates possibly a ...
abstract 2017
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Wetser, A. (author), Uijttewaal, W.S.J. (author), Mosselman, E. (author), Penning, E. (author), Duro, G. (author), Yuan, J. (author)
Over the past centuries natural river banks have been transformed into banks with artificial revetments or sheet piles to protect them from erosion. Important river features for flora and fauna have disappeared and the ecological quality of the river reduced dramatically. Recently, the importance of the ecological function of rivers has been...
abstract 2017
Searched for: author:"Uijttewaal, W.S.J."
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