DSpace DSpace UPC
 Català   Castellano   English  

E-prints UPC >
Altres >
Enviament des de DRAC >

Empreu aquest identificador per citar o enllaçar aquest ítem: http://hdl.handle.net/2117/14929

Ítem no disponible en accés obert per política de l'editorial

Arxiu Descripció MidaFormat
D5005_Nnafie.pdfarticle801,78 kBAdobe PDF Accés restringit

Citació: Nnafie, A. [et al.]. Formation of shoreface-connected sand ridges: effects of rigid-lid approach, quasi-steady approach and wave-topography feedbacks. A: River Coastal and Estuarine Morphodynamics. "Proceeding of the 7th IAHR Symposium on River, Coastal and Estuarine Morphodynamics". Pekin: 2011, p. 2114-2123.
Títol: Formation of shoreface-connected sand ridges: effects of rigid-lid approach, quasi-steady approach and wave-topography feedbacks
Autor: Nnafie, Abdel; de Swart, Huib E.; Garnier, Roland Veure Producció científica UPC; Calvete Manrique, Daniel Veure Producció científica UPC
Data: 2011
Tipus de document: Conference lecture
Resum: The initial- and long-term evolution of shoreface-connected sand ridges (sfcr) is investigated with a new nonlinear model (MORFO56) that employs finite difference methods, rather than spectral methods. MORFO56 uses depth-averaged shallow water equations, including sediment transport and bed updating. Moreover, it includes full wave-topography feedbacks, wave shoaling and refraction, and wave radiation stresses. First, effects of relaxing the rigid-lid assumption and quasi-steadiness on the initial growth and migration of sfcr are quantified, by conducting a series of short-term runs. It turns out that assuming a free lid and unsteady flow results in larger wavelengths and larger migration speeds of sfcr. Furthermore, the new model is able to simulate the finite amplitude behaviour of sfcr for more realistic bottom slopes than earlier spectral models. Finally, the role of wave-topography feedbacks in the initial formation of sfcr is examined. Model simulations show that sfcr in the presence of these feedbacks are more trapped to the shoreface, with an offshore extent of approximately 1 km. Moreover, growth of sfcr is enhanced considerably by wave-topography feedbacks. The specific inclusion of radiation stresses does not affect this result.
ISBN: 978-7-89444-548-3
URI: http://hdl.handle.net/2117/14929
Apareix a les col·leccions:Altres. Enviament des de DRAC
DF - Dinàmica No Lineal de Fluids. Ponències/Comunicacions de congressos
Departament de Física Aplicada. Ponències/Comunicacions de congressos
Comparteix:


Stats Mostra les estadístiques d'aquest ítem

SFX Query

Aquest ítem (excepte textos i imatges no creats per l'autor) està subjecte a una llicència de Creative Commons Llicència Creative Commons
Creative Commons

 

Valid XHTML 1.0! Programari DSpace Copyright © 2002-2004 MIT and Hewlett-Packard Comentaris
Universitat Politècnica de Catalunya. Servei de Biblioteques, Publicacions i Arxius