Study of the diffusion activity in case of non-breaking waves with a current

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...

Shallow foreshore wave height statistics

Wave height distributions on shallow foreshores deviate from those in deep water due to the effects of the restricted depth-to-height ratio and of wave breaking. Laboratory data of wave heights on shallow foreshores of different slopes have been analysed to determine these effects and to derive generalised empirical parameterisation. A model...

Sediment transport in case of irregular non-breaking waves with a current

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.

Golfhoogteverlaging in het Ekofisk veld: Een alternatief voor de platform jack-up. Deel II

Deel II bevat het derde deelverslag uit maart 1988 waarin de dynamische golfbreker constructief wordt uitgewerkt. En waarin ook een kostenschatting van de dynamische golfbreker in het Ekofisk veld is gemaakt. De dynamische golfbreker is een golfdempingssysteem bestaande uit een groot aantal boeien die onder het zeeoppervlak verankerd worden, en...

Sediment transport concentrations and sediment transport in case of irregular non-breaking waves with a current

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...

Seabed response to water waves

The final objective was to evaluate the stability of an offshore pipeline from a geotechnical point of view. On the Dutch part of the Continental Shelf pipelines are used for the transportation of oil and gas and utilities liRe glycol. The mean waterdepth on this part of the North Sea varies from 20-40 meters. As this region is a major fishing...

A comparison of mathematical models for wave propagation in harbours

A wave entering a harbor will be diffracted and reflected, depending on the shape and the construction of breakwaters, quays and other objects in the harbor. The incoming wave can increase or decrease in height and a resonance can occur. This affects the manouvering of ships and the movement of moored ships, which influences the loading and...

Numeriek model voor de bepaling van het zandtransport onder invloed van golven

Er zijn door o.a. Vetlinga en Schepers proeven gedaan in een laboratoriumgoot ter bepaling van zandtransport in de voortplantingsrichting van golven onder invloed van die golven. Doel van deze proeven is om neer inzicht te krijgen in de opwoeling van het bcdemmateriaal aan de bcdem en op die manier in het zandtransportmechanisme . In al die...

Mass transport in gravity waves on a sloping bottom

Summary of the graduation work published at the ICCE: In the present investigation the influence of bottom slope on mass transport by progressive waves was investigated, both theoretically and experimentally. Theoretical considerations based on linear wave theory show the greatest influence of the slope on the bottom drift velocities for...