Zoeken
Zoeken kan via de modus 'eenvoudig zoeken' (één veld) of uitgebreid via 'geavanceerd zoeken' (meerdere velden). Zo kan je bv. zoeken op een combinatie van een auteursnaam (auteur), een jaartal (jaar) en een documenttype.
Boekenmand
Nuttige resultaten kan je aanvinken en toevoegen aan een mandje. De inhoud hiervan kan je exporteren of afdrukken (naar bv. PDF).
RSS
Op de hoogte blijven van nieuw toegevoegde publicaties binnen uw interessegebied? Dit kan door een RSS-feed (?) te maken van jouw zoekopdracht.
nieuwe zoekopdracht
Non-linear channel-shoal dynamics in long tidal embayments
Schramkowski, G.; Schuttelaars, H.M.; de Swart, H.E. (2004). Non-linear channel-shoal dynamics in long tidal embayments. Ocean Dynamics 54: 399-407
In: Ocean Dynamics. Springer-Verlag: Berlin; Heidelberg; New York. ISSN 1616-7341; e-ISSN 1616-7228, meer
|  |
| Trefwoorden |
Motion > Tidal motion > Tides
Motion > Water motion > Circulation > Water circulation > Shelf dynamics > Estuarine dynamics
Sediment load > Suspended load
Sedimentary structures > Bed forms
Water bodies > Coastal waters > Coastal landforms > Coastal inlets > Estuaries
|
| Author keywords |
Morphodynamics; Morfodynamica |
| Auteurs | | Top |
- Schramkowski, G., meer
- Schuttelaars, H.M.
- de Swart, H.E.
|
|
|
| Abstract |
The dynamics of finite-amplitude bed forms in a tidal channel is studied with the use of an idealized morphodynamic model. The latter is based on depthaveraged equations for the tidal flow over a sandy bottom. The model considers phenomena on spatial scales of the order of the tidal excursion length. Transport of sediment mainly takes place as suspended load. The reference state of this model is characterized by a spatially uniform M2 tidal current over a fixed horizontal bed. The temporal evolution of deviations from this reference state is governed by amplitude equations: these are a set of non-linear equations that describe the temporal evolution of bed forms. These equations are used to obtain new morphodynamic equilibria which may be either static or time-periodic. Several of these bottom profiles show strong similarity with the tidal bars that are observed in natural estuaries. The dependence of the equilibrium solutions on the value of bottom friction and channel width is investigated systematically. For narrow channels (width small compared to the tidal excursion length) stable static equilibria exist if bottom friction is slightly larger than rcr. For channel widths more comparable to the tidal excursion length, multiple stable steady states may exist for bottom friction parameter values below rcr. Regardless of channel width, stable time-periodic equilibria seem to emerge as the bottom friction is increased. |
IMIS is ontwikkeld en wordt gehost door het VLIZ.
