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Coastal aeolian sediment transport in an active bed surface layer: Tracer study and conceptual modelUphues, Charlotte F.K. (author), van IJzendoorn, C.O. (author), Hallin, E.C. (author), Pearson, S.G. (author), van Prooijen, Bram (author), Miot da Silva, Graziela (author), de Vries, S. (author)Coastal aeolian sediment transport is influenced by supply-limiting factors caused by sediment sorting by grain size. Sorting processes can lead to coarsening of the bed surface and influence the formation of aeolian ripples. However, the influence sorting processes and bedforms might have on the magnitude of the transport is not fully...journal article 2022
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Bruch, William (author), Cordier, Emmanuel (author), Floc'h, France (author), Pearson, S.G. (author)Coral reefs represent an efficient natural mechanical coastal defense against ocean waves. The focus of this study is La Saline fringing coral reef, located in the microtidal West of La Réunion Island in the Indian Ocean, frequently exposed to Southern Ocean swell and cyclonic events. The aim is to provide a better understanding of the reef's...journal article 2022
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Oosterlo, P. (author)This dissertation focuses on the Eems-Dollard estuary in the north of the Netherlands and contributes to the MVED (’Meerjarige Veldmetingen Eems-Dollard’) field measurement project in the area. The Eems-Dollard estuary is part of the Wadden Sea, a shallow shelf sea with barrier islands, deep tidal channels, shallow tidal flats and wetlands. The...doctoral thesis 2021
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Coastal Aeolian Sediment Transport in an Active Bed Surface Layer: Tracer Study and Conceptual ModelUphues, Charlotte (author)Coastal aeolian sediment transport is influenced by supply-limiting factors such as sediment sorting by grain size. Sorting processes can cause a coarsening of the bed surface and influence the formation of aeolian ripples. However, it is not fully understood what influence sorting processes have on the magnitude of this transport. In this study...master thesis 2021
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Bolhuis, Remco (author)An important subject in the research on the behaviour of railway structures is the validation of numerical models by means of in-track measurements. Many forms of track measurements have taken place all over the world, mainly in the sense of strain and acceleration measurements, but a more unexplored area is that of the direct measurement of...master thesis 2021
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Tukker, Jim (author)During berthing operations vessels use their bow thruster(s) to improve their manoeuvrability, making them less dependent on the assistance of tugboats. The jet from a bow thruster reflects on the quay wall. It is directed towards the bottom where it reflects, causing high flow velocities over the bed. This may scour the nearby bed when it is...master thesis 2021
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Oosterlo, P. (author), Hofland, B. (author), van der Meer, J.W. (author), Overduin, Maarten (author), Steendam, Gosse Jan (author)This paper presents the first field measurements with an innovative laser scanner system, during an actual severe winter storm with very oblique wave attack. The goal of this paper is to validate this innovative system for measuring wave run-up and wave overtopping parameters during storms with very oblique wave attack. The paper describes the...journal article 2021
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de Vet, P.L.M. (author)Intertidal flats — regions of estuaries that emerge every tide from the water — form unique ecosystems. Benthic communities living in the bed are a valuable food source for wading birds. Salt marshes present on these flats further enhance the biodiversity. Through the damping of waves, intertidal flats also contribute to the safety of the...doctoral thesis 2020
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Cantoni, Irene (author)During mooring operations, ships tend to make an extensive use of bowthruster in order to minimize the need for tug assistance. Jet caused by transverse thrusters directly impinges quay walls, and can cause scour on the bed, therefore threatening structural stability of quay walls. Presence of vertical quay walls induces reflection of...master thesis 2020
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Spoelstra, A.M.C.M.G. (author), Mahalingesh, N. (author), Sciacchitano, A. (author)An on-site Ring of Fire (RoF) experiment is performed at the Tom Dumoulin bike park in Sittard-Geleen, the Netherlands. The current work investigates the aerodynamic drag of a cyclist following a lead cyclist at different lateral and longitudinal separations; additionally, the athletes’ skills to maintain their position and distance with respect...journal article 2020
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Oosterlo, P. (author), Hofland, B. (author), van der Meer, J.W. (author), Overduin, Maarten (author), Steendam, Gosse Jan (author)Oosterlo et al. (2019) developed a system using two terrestrial laser scanners, which can measure run-up heights, depths and velocities of waves on a dike in field situations. The system has now been placed next to two overtopping tanks on a dike in the Eems-Dollard estuary in the Netherlands to measure during actual severe winter storms. The...abstract 2020
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Tas, S.A.J. (author), van Maren, D.S. (author), Reniers, A.J.H.M. (author)Cheniers are important for stabilising mud-dominated coastlines. A chenier is a body of wave-reworked, coarse-grained sediment consisting of sand and shells overlying a muddy substrate. In this paper we present and analyse a week of field observations of the dynamics of a single chenier along the coast of Demak, Indonesia. Despite relatively...journal article 2020
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Shi, Can (author), Zhao, Chunfa (author), Yang, Yang (author), Guo, Y. (author), Zhang, Xu (author), Feng, Yang (author)To probe into the mechanical behaviour of railway transition zone from the macro-meso aspects, a numerical model of transition zone is built that hybrids the Discrete Element Method (DEM) and Finite Difference Method (FDM). The DEM is utilised to simulate the ballast bed and sleeper, because it can consider the realistic ballast shapes and...journal article 2020
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de Wit, F.P. (author), Tissier, M.F.S. (author), Reniers, A.J.H.M. (author)The nonlinear wave shape, expressed by skewness and asymmetry, can be calculated from surface elevation or pressure time series using bispectral analysis. Here, it is shown that the same analysis technique can be used to calculate the bound superharmonic wave height. Using measured near-bed pressures from three different field experiments, it...journal article 2020
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Grossmann, Florian (author)Velocities derived from X-band radar were compared to depth averaged ADCP measurements in a complex tidal inlet system at Ameland, the Netherlands. Inclusion of depth assimilation and ensemble averaging in radar calculations led to smaller differences between ADCP and radar. The observed differences were clustered and related to water level...master thesis 2019
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de Wit, F.P. (author), Tissier, M.F.S. (author), Reniers, A.J.H.M. (author)Field measurements of waves and currents were obtained at ten locations on an ebb-tidal shoal seaward of Ameland Inlet for a six-week period. These measurements were used to investigate the evolution of the near-bed velocity skewness and asymmetry, as these are important drivers for wave-induced sediment tranport. Wave shape parameters were...journal article 2019
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- Oosterlo, P. (author), Hofland, B. (author), van der Meer, J.W. (author), Overduin, Maarten (author), Steendam, Gosse Jan (author), Nieuwenhuis, Jan-Willem (author), van Vledder, G.P. (author), Steetzel, Henk (author), Reneerkens, Michiel (author) abstract 2019
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Oosterlo, P. (author), Hofland, B. (author), van der Meer, J.W. (author), Overduin, Maarten (author), Steendam, Gosse Jan (author), Nieuwenhuis, Jan-Willem (author), van Vledder, G.P. (author), Steetzel, Henk (author), Reneerkens, Michiel (author)Wave overtopping is commonly measured using overtopping tanks. In this paper, an alternative system is developed by using two laser scanners. It measures wave run-up, as well as layer thicknesses and front velocities, both during normally and obliquely incident waves on a dike in the field. The paper considers the first field validation tests...conference paper 2019
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Wikkerink, D.P. (author), Mor, A. R. (author), Polinder, H. (author), Ross, Robert (author)In order to avoid detection by sea mines, the magnetic signature of merchant and naval vessels can be reduced by running a current through a set of on-board copper coils. This process is called degaussing. Studies have shown that the volume, weight and energy losses of a degaussing system can be reduced by replacing the copper coils with high...conference paper 2019
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- Oosterlo, P. (author), van der Meer, J.W. (author), Hofland, B. (author), van Vledder, G.P. (author) abstract 2018