Grain size influence on sediment transport in sheet flow conditions for combined wave-current flow

Especially during storms the coast-profile can change dramatically. During storms large waves cause high oscillatory water velocities near the bottom and the bed becomes plane and sheet flow becomes the dominant sediment transport mode. Because field measurements are difficult to perform in-situ, laboratory experiments concerning these processes...

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

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...

Zandtransport in de golfrichting in relatief ondiep water

Sediment transport by waves in the direction of the waves in relatively shallow water. Het onderzoek naar zandtransport in meest algemene Zin kent al een ruime historie. In eerste instantie lag het accent hierbij op bestudering van het zandtransportverschijnsel onder invloed van een permanente stroom, zoals in rivieren en kanalen. Daarbij is in...

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...

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.

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...

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...