Collection: education
(1 - 20 of 58)

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Van der Zwaag, J. (author)
In the mass balance of a riverbed, some terms are usually assumed constant for reasons of simplicity. One of the terms assumed to be constant is the change in bedload layer, which is defined as the sediment transport divided by the particle velocity. To study the effect of this assumption, a numerical morphodynamic model has to be computed. For...
bachelor thesis 2013
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Van Noort, J.C. (author)
Rip currents are narrow and intense, offshore directed flows in the nearshore zone. A rip current is able to transport a considerable amount of water and sediment seaward and may dominate the morphological exchange between surfzone and the offshore. Rip currents are often located nearby lateral boundaries that obstruct the longshore current, but...
master thesis 1997
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Olij, D.J.C. (author)
In this thesis 6 wave climate reduction methods are described and evaluated. Of these methods, 3 are commonly used in literature and 3 are machine learning methods that are adjusted so that they can be used for the reduction of a wave climate. The evaluation is executed with the use of a Delft3D model of the coast of Durban, South Africa.
master thesis 2015
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Janssen, C.M. (author)
Cross-shore sediment transport is an important phenomenon in coastal engineering, which mainly accounts for the short-term changes in the coastline. To study on- and offshore transport the evolution of the beach profile is considered. For investigation of the beach profile small-scale physical models are often used. A problem in using a physical...
master thesis 1993
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Tönjes, P. (author)
The bed of some rivers partially consists of non-erodible layers. These non-erodible layers may become obstacles for navigation during the low-water period. To improve navigation development in the future, one can consider the removal of the non-erodible layers. To predict the morphological consequences due to these works, knowledge about the...
master thesis 1989
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De Jongste, A.L. (author)
The area of the Merwedes is a transition zone between a tide-dominated area and a river-dominated area. With increasing river discharge, the influence of river flow dominates in this part of the Rhine-Meuse Delta. The composition of the river bed of the Merwedes is also a transitional area, because of the presence of both sand and mud. It is...
master thesis 2010
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Ligthart, D. (author)
The Ayeyarwady River is a river with large hydrological variations and an abundance of relatively fine non-cohesive sediment, causing the dynamic behaviour of the river with fast shifting channels. This dynamic behaviour, together with the large hydrological variations, is the source of a frequently flooding river with a moderate navigability....
master thesis 2017
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Postma, M.G. (author)
This study describes the stability of rock on a mild slope (e.g. milder than 1:6) under wave loading. This is done because an increasing number of situations occur where mild foreshores are protected from the wave and currents. The empirical stability formula, designed by VAN DER MEER [1988], is not valid for these kind of slopes. Nonetheless,...
master thesis 2016
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Hop, M. (author)
The Rhine ROFI ( region of freshwater influence) is a dynamic area where various processes and timescales come together. Research has shown that stratification caused by the freshwater outflow of the Rhine alters the tidal currents in front of the Dutch coast. In the case of the Netherlands the tide behaves like a kelvin wave, which causes...
master thesis 2017
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Adriaens, F. (author), Van Rillaer, L. (author)
The objective of the present work is to see whether the transport of sediment in a turbulent free surface flow can be studied with a new method of video image analysis, called the Two-Dimensional Particle Tracking Velocimetry. A slice of a two-dimensional turbulent flow in a laboratory flume is illuminated and particles are injected. After the...
master thesis 1996
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Verduin, F. (author)
The objective of this thesis is to improve the insight into the morphological processes in the outer delta of the Westerschelde estuary, especially those related to the sediment exchange between the delta and the estuary. The main residual sediment transport patterns in the delta have been found to look as follows. On a large scale there is a...
master thesis 2009
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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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Ohnishi, M.P. (author)
Sediment transport causes morphological changes of coastal areas, and it is one of the most important objects in coastal engineering study. Recently, various experiments have been performed to investigate the sediment transport mechanism under a combination of waves and currents and to find the underlying relationships among various parameters...
master thesis 1989
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Nap, E.N. (author), Van Kampen, H.F.A. (author)
Investigation to sediment transport rate in case of waves and currents, tests executed in the wave-current flume of the laboratory of Fluid mechanics of TU Delft. Sediment transport was measured using sand of 100 micron; comparison to similar tests with 200 micron sand.
master thesis 1988
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Cloin, B. (author)
The main goals of this study are to obtain more insight and quantitative data of the selective transport process under sheet flow conditions. Experiments were carried out in the Large Oscillating Water Tunnel of WL DELFT HYDRAUUCS for five different hydraulic conditions. The sand that was used consisted of a mixture of 50% fine (0. 13mm) and 50%...
master thesis 1998
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Hendriks, A.J.H. (author)
Objective Due the coastal protection program along the Dutch coast, the groins that first defended the coast against erosion, are now covered under sediment. Due to erosion the covered groins will resurface however. The objective of this study is to investigate the effect of the resurfacing groins on the hydrodynamics and sediment transport....
master thesis 2011
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Velhorst, R.L.C. (author)
Morphodynamic models are widespread in coastal engineering practice and indispensable to predict the effectiveness of (large-scale) sandy interventions. These models enable quantification of the effects on enhanced safety against flooding and on environmental impact over time, based on physical processes such as hydrodynamics and sediment...
master thesis 2017
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Van der Kaaij, T. (author), Nieuwjaar, M.W.C. (author)
In many coastal, engineering problems the sediment transport plays a part. A transport gradient causes accretion or erosion. Various models, such as that of Bijker, Engelund and Hansen (van de Graaff and van Overeem, 1979) and Nielsen (1985) are available to estimate the sediment transport rate if the hydraulic and environmental conditions (wave...
master thesis 1987
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Van den Wollenberg, N.A.M. (author)
The purpose of this study is to quantify the cross-shore sediment transport, caused by washover flows on barrier islands in general and on the Wai San Ting sandbar in Taiwan in particular. Washover transport on a barrier island is the transport of sediment across the sandbar f r om its steeper seaward face towards the gentler sloping landward or...
master thesis 1994
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Havinga, F.J. (author)
The present report contains a description of an experimental program, as a follow up of experiments by v.d. Kaaij and Nieuwjaar in 1986, and Nap and Van Kampen in 1987. As in the second study, in the present study a particle sand diameter of D50 = 100 mu was used, so that the experiments of Nap and Van Kampen will be referred as "the earlier 100...
master thesis 1992
Collection: education
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