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Janssen, P.C. (author)Since 1992 nearshore hydrodynamics and coastal morphology have been studied from ARGUS video images, collected every hour at eight beach locations worldwide. Identification of the waterline from these images would enable us to obtain an impression of the intertidal beach bathymetry, and hence to monitor intertidal beach morphodynamics. In this...master thesis 1997
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Van Schijndel, S.A.H. (author)Vermindering door aanpassing van de vormgeving van jachthavens 't Steel en la Bonne Aventure. Jachthavens aan rivieren slibben steeds verder dicht. AIs gevolg hiervan lopen de kosten voor het beheer van een dergelijke haven zo hoog op dat enkele havens misschien zelfs moeten sluiten. Daarom is er landelijk een onderzoek gestart om te bezien of...master thesis 1997
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De Jong, J.C.M. (author)Due to the new act on the water defense the Directorate-General of Public Works and Water Management of the Netherlands is required to evaluate the design conditions for the coastal defenses every five years. To do this evaluation a model is needed to translate offshore wave conditions to nearshore design conditions. For such transformations...master thesis 1997
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Doorn, N. (author)Waves that approach the coast and encounter obstacles such as small islands, rocks or breakwaters may be reflected backwards and in lateral directions, but the wave crest may also bend around the obstacle. This phenomenon can be described with refraction-diffraction models based on the Boussinesq equation or the mild-slope equation of Berkhoff....master thesis 1997
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Les, B.A.J. (author)The Friesche Zeegat area is situated in the northeast of the Netherlands and is a part of the Dutch Waddensea. The Friesche Zeegat area consists of the barrier Islands Ameland and Schiermonnikoog and a part of the Waddensea. Drainage occurs through tidal channels and the major tidal inlets. Seawards of the inlet, an ebb-tidal delta occurs. The...master thesis 1997
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Jongbloed, J.W. (author)The flow in a river bend has a large influence on the cross-sectional profile of the bend. Due to the curvature of the bend a secondary flow, which is perpendicular to the main flow, occurs. The secondary flow is directed outwards in the upper part of the cross-section and inwards in the lower part of the cross-section. It causes by means of the...master thesis 1996
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Akdag, C. (author)The region of South China Sea and the Indonesian waters, covering an area of about 9 million km2, is characterised by a very complex tidal behaviour. This region, which will be called the South China Sea throughout this report, is entangled between the Pacific Ocean and the Indian Ocean. Therefore the tides in the South China Sea are driven by...master thesis 1996
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Klok, P.K. (author)De oeverbeschermende werking van riet bestaat aan de ene kant uit een vergroting van de sterkte, het wortelstelsel vormt een sterke wapening van de grond, en aan de ander kant uit een verkleining van de golf en de stroombelasting. In dit onderzoek wordt onderzoek gedaan naar de invloed van riet op de golfbelasting. Om de invloed van net op de...master thesis 1996
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Caan, C.P. (author)In Nederland wordt, ter vervanging van de huidige ontwerpmethodiek op basis van een overschrijdingskans, gewerkt aan een nieuwe, probabilistische ontwerpnorm voor de zee- en rivierdijken. Deze nieuwe norm wordt gebaseerd op een risicobenadering. Hierbij bestaat het risiko uit de kans op een overstroming, gecombineerd met de schade die daardoor...master thesis 1996
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Van Gruijthuijsen, M.F.J. (author)In this thesis, the wave prediction model SWAN is validated on field data obtained from wave growth experiments that were done in Lake George, a shallow lake in Australia. SWAN, which is an acronym for Simulation of WAves in Nearshore areas, is a numerical model, developed at the University of Technology in Delft, to obtain estimates of wave...master thesis 1996
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Gautier, C. (author)In coastal engineering waves often play a dominant role. To predict the wave behaviour in coastal regions numerical wave propagation models have been developed. This study deals with the verification of two models against measurements in the field, namely HISWA and SWAN. The second generation model HISWA has already proven to perform well for...master thesis 1996
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Reys, R. (author)Ocean waves are random and their crests evolve non-linearly. Yet commonly used wave models correctly incorporate only one of these aspects: the models either use non-linear regular wave theory whilst ignoring the randomness or use linear random theory with empirical corrections close to the free surface. For the more realistic design and re...master thesis 1996
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Kirkegaard, L.C. (author)Every harbour has its own uniques et of natural frequencies depending on its geometry. If waves with frequencies close to one of these natural frequencies continue to enter from offshore for some time, the harbour will resonate. This phenomenon is called harbour resonance or seiching and the characteristic oscillations seiches. A moredetailed...master thesis 1996
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Nederstigt, N.J. (author)As a result of a number of causes, more and more human activities are shifting to offshore locations, resulting in a fast growing number of offshore structures. Not only the number of (planned) offshore structures increases, but also the diversity of the designs is growing. Nowadays these structures are often situated in deeper water. It is...master thesis 1996
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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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Aarninkhof, S.G.J. (author)Since 1992, coastal morphology and hydrodynamics of the nearshore zone have been studied from video observations, within the framework of the so-called ARGUS research program. Image data are collected every day-light hour, at seven beach locations worldwide. Timeaveraged images show bright, longshore bands of intensities, clearly indicating the...master thesis 1996
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Hoornstra, D.R. (author)Gemeentewaterleidingen Amsterdam produceert en levert drinkwater aan Amsterdam en omstreken. Het zuiveringsproces van water vindt plaats in twee produktiebedrijven, de rivierduinwaterleiding en de rivier-plassenwaterleidingen. De rivier-duinwaterleidingen krijgt het ruwe water aangeleverd door de Watertransportmaatschappij Rijn-Kennemerland (WRK...master thesis 1996
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Van der Wegen, M. (author)A shallow water mixing layer is a flow pattern which develops between two adjacent streams with a different velocity. The horizontal dimensions of a shallow water mixing layer are much larger than the depth. This results in a turbulent process in the mixing layer which is characterized by the presumable presence of two distinct turbulent length...master thesis 1996
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- Nederstigt, N.J. (author) master thesis 1996
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The influence of Mooring Lines on the Damping of Low Frequency Motions of Moored Offshore StructuresRaaijmakers, R.M. (author)For years it has been customary, in the prediction the Low Frequency (LF) dynamic behaviour of moored offshore structures, to assume that the mooring system only influences the restoring force characteristics. The contribution of the mooring system to the total system damping was neglected. Research and model tests in recent years have shown...master thesis 1995