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Chortis, Giorgos (author)Offshore wind farms are rapidly developing in Western Europe as an alternative means of clean energy. The foundation of wind-turbines in the shallow water of the Northern Sea is almost exclusively (over 87%) performed by short rigid monopiles, as an efficient and relatively cheap solution. Scour formation, meaning the soil removal around the...master thesis 2018
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van de Zande, Bart (author)In the proximity of the Eastern Scheldt storm surge barrier (ES-SSB), one of the largest hydraulic structures of the Dutch Delta Works, scour holes have developed that potentially threaten the stability of the structure. Although, these scour holes were anticipated in the design phase recent bathymetry measurements show that they are growing...master thesis 2018
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Wevers, Toon (author)In this research the hydrodynamic stability of a ballast filled mattress under waves is investigated. There is checked if this can be applied as scour protection around a suction bucket jacket: an offshore wind turbine foundation that uses a vacuum to suck itself in position. A ballast filled mattress is a mattress made from polyester with so...master thesis 2018
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van der Bilt, Daphne (author), Kroes, Jenske (author), Paulissen, Sjoerd (author), van Wierst, Bas (author)The reach of the Magdalena River around the city of Barrancabermeja experiences large issues concerning its navigability since the construction of the Yondó Bridge. The purpose of this study is to investigate possible causes of this poor navigability and to come up with an improvement to the current situation. The influence of bars and scour...student report 2018
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Chortis, Giorgos (author)Wind turbines are nowadays the main means for producing renewable energy in Northern and Western Europe, and therefore research is conducted to secure their efficiency. One of the critical aspects of the windfarms is the foundation type, as it can define the functionality and the cost of each turbine. Monopiles have prevailed as the most...student report 2018
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Middelweerd, luuk (author)In the Dutch coastal waters more and more wind turbines on monopile foundations are built. An important design parameter is the first natural frequency of the wind turbine. The first natural frequency is dependent on environmental conditions and different soil conditions such as scour. This research gives a better insight into the sensitivities...master thesis 2017
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Bom, Sam (author)In the Rhine-Meuse Delta in the Netherlands, deep scour holes can develop very suddenly. The holes may form a potential risk for the stability of surrounding riverbanks, dikes, bridges, tunnels and buildings. A scour hole can mostly be the result of two conditions: local changes in hydrodynamical conditions or local changes in erosive capacity...master thesis 2017
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Stenfert, Joost (author)In the Rhine-Meuse delta many scour holes are present. These scour holes form a potential risk on the surrounding bridges, levees, weirs, dikes and tunnels. In general, scour holes can develop when there is a local change in hydrodynamic conditions or erosive capacity. Extensive research has been done in the past on scour holes close to...master thesis 2017
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Koopmans, H. (author)Over one hundred scour holes are located in the Rhine-Meuse delta. These scour holes have relatively large depths and steep slopes and could pose a risk to the stability of river banks and hydraulic structures, especially since some scour holes are still growing. Scour holes develop at locations where either the hydrodynamics or the erodibility...master thesis 2017
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Van Eijk, T.F.A. (author)Within Royal HaskoningDHV an innovative concept is thought to be feasible as a new foundation for larger wind turbines in deeper waters. In this thesis the development of this innovative offshore wind turbine foundation was aided. The research focused on two topics: - Scour at this gravity based foundations. - Possible design optimisations with...master thesis 2016
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Centen, I. (author)In this report a prediction method is developed for scour around monopiles. A soft computing technique called genetic programming (GP) is used to create a scour prediction formula that can compute scour in all offshore conditions, meaning current-induced, wave-induced and combined current- and wave-induced scour. The GP was trained with an...master thesis 2015
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Pascu, V. (author)Wind power has proven to be one of the most versatile forms of renewable energy. Similarly, offshore wind is currently emerging as the most promising method of meeting the global target for low cost of renewable energy production, given the massive potential of wind at sea. However, from the wind turbine design point of view, the requirement of...master thesis 2015
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Van den Brink, F. (author)Scour hole formation around offshore monopile foundations is a threat for the structure’s stability. Large uncertainty leads to conservatism in design codes and hence to high construction costs. Under the same hydrodynamic loading as for scour hole formation the soil can liquefy due to structural vibrations or waves. The aim of this study is to...master thesis 2014
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Roelse, F.P. (author)In the last decades shipping has increased significantly, resulting in larger ships with an increasing power in bow thrusters. Due to this increasing power, the hydraulic loads at bottom protection near quay structures has also increased, making a traditional bed protection more expensive. Therefore an alternative design method is suggested in...master thesis 2014
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Papadopoulos, D. (author)Scour formation at the toe of a rubble mound breakwater can lead to abrupt failure. Nowadays, counteraction of scour via geometrically closed filter rules, geotextiles or combinations is the common practice. Alternatively, in specific cases the use of geometrically open filters can save significant amount of time and decrease constructional...master thesis 2012
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Smits, T.C. (author)Due to the closure of the Haringvliet in 1970 as part of the Delta works and the opening of the Beerdam in 1997, the course of the tidal flow in the Rhine-Meuse delta has changed. The tidal flow from and towards the Haringvliet is now completely taking place through the branches that connect the Haringvliet with the Nieuwe Maas and Nieuwe...master thesis 2011
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Devillé, S.B. (author), Hooning, E.M. (author), De Jong, M.S. (author), Sturm, O.L.M. (author), Verhage, M.J. (author)In southern Brazil, in the province of Santa Catarina, the port of Itajai is situated. The port is located at the mouth of the river Itajai-Acu, about 3 km inland. The Port of Itajai is very important for both the local and national economy because of its role in foreign trade, and due to this prominent role in the community many stakeholders...student report 2010
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Feenstra, T.D.S. (author)De laaggelegen delen van Nederland en de gebieden langs de rivieren worden tegen hoog water beschennd met een stelsel van waterkeringen, waaronder dijken. Over dijkbouw is veel bekend, maar over het bezwijken van een dijk veel minder. Dit is wel een steeds belangrijker wordend onderwerp. In de probabilistiek wordt met het mogelijk falen van een...master thesis 1999
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Lucassen, R.J. (author)This report deals with the physical experiments on scour underneath submarine pipelines, carried out as part of the MaTS project on the stability of submarine pipelines. Moreover, these experiments, which have been carried out in the laboratory for fluid mechanics of the Department of Civil Engineering of the Delft University of Technology, are...master thesis 1984
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Van Staverden, J.H. (author)Detailed analysis of river groynes, extensive literature overview, additonal study on fiction and friction coefficients of several material interfaces (especially between rock and geotextile). Aanlysis of erosion downstream of a groyne with the method of Garde. Field tests.master thesis 1983