Marine sandwave dynamics
(Dynamique des dunes sous-marines)

[ Organisation | Présentation | Abstracts ]

Proceedings of an international workshop held in
Lille, France, 23 & 24 MARCH 2000
Organized and sponsored by

Service Hydrographique et Océanographique de la Marine	Université de Lille 1	Société Géologique du Nord

Photo de couverture : Banc de la Schôle Levé hydrographique: Mission Hydrographique de l'Atlantique 1999 Traitement H. Bisquay et P. Ledu © SHOM ISBN : 2 - 11 088 263 - 8

Organisation

Marine sandwave dynamics
Lille, France, 23 & 24 MARCH 2000
Alain Trentesaux and Thierry Garlan editors

Organized and sponsored by:

Université de Lille 1:
Université de Lille 1 - SN5 - Sédimentologie et Géodynamique - UMR 8577 CNRS
59 655 Villeneuve d'Ascq Cedex - FRANCE
http://www.univ-lille1.fr/geosciences/page_ufr

Service Hydrographique et Océanographique de la Marine :
EPSHOM - Centre Hydrographie - 13, rue du Chatellier - BP 30316
29603 Brest Cedex - FRANCE
http://www.shom.fr/sci/sedim/sitesedi.html

Société Géologique du Nord :
Société Géologique du Nord - Université de Lille 1 - SN5
59 655 Villeneuve d'Ascq Cedex - FRANCE
http://www.univ-lille1.fr/geosciences/page_ufr/divers/sgn.html

This workshop is also supported by URM17: Bordeaux & Lille universities, Ifremer Brest

Scientific Committee

Hervé Chamley : University of Lille
Serge Berné : Ifremer
Huib de Vriend : University of Twente
Carlos Van Cauwenberghe : Belgian Hydrographic Office

Organising Committee

Alain Trentesaux : University of Lille
Thierry Garlan : EPSHOM
Georges Chapalain : University of Lille
Jean-François Deconinck : University of Lille
Jean-Marie Degardin : University of Lille
Françoise Dujardin : University of Lille
Axel Ehrhold : EPSHOM
Sophie Le Bot : University of Lille
Nicolas Tribovillard : University of Lille
Laurent Thais : University of Lille

Citation : Marine Sandwave Dynamics, International Workshop, March 23-24 2000, University of Lille 1, France. Proceedings. Trentesaux A. and Garlan T. Ed, 240 pages.

Présentation

Preface

The idea to organize a workshop dedicated to the marine sandwave dynamics was proposed in 1998 during a meeting, held in Paris, of the North Sea Hydrographic Commission.

1- Marine sandwaves, let say subaqueous dunes as Gail Ashley proposed, are widespread on numerous continental shelves. A lot of people are looking at them with different eyes. In this context, what are the main objectives of such a workshop ?

Subaqueous dunes are mobile sedimentary bodies that are utterly sensitive and can be considered as protection or risk factors. The objective of this workshop is to improve our knowledge in the field of their dynamics by :

• sharing the skills of concerned scientists,


• comparing the specialities of sea-observers, measures, experimenters, modellers, all of them looking for a meeting point,


• trying to mix our ideas in order to get a better tool to predict the dune position and for a better management of the continental shelf waters.

2 - The workshop is international by essence and multidisciplinary by reason.

• The interest of this workshop is outlined by the thirty six lectures or poster and three keynotes the abstract of which you can find in this 'Extended abstract' book. Authors and co-authors are coming from 13 countries with a majority of europeans. It represents a great number of research laboratories and companies.
• Among the objectives of the workshop was the idea to combine different expertises. This seems to be achieved as we find in the authors' list fluid mechanics theoreticians to coastal managers and end-users. It represents some universities but also the main european marine research institutes, national agencies, 'applied' companies and environmental managers.

3 - Four main sessions have been defined :

• In-situ measurement and morphodynamics,


• Hydrodynamic and hydro-sedimentary modelling,


• Recent and long-term evolution,


• Databases, management and forecasting.

We hope this workshop will, at least, open our mind to other research fields and led to fruitfull discussions. No doubt that forthcoming investigations to be carried out on dunes by participants and other will shed light on some of the still obscure remaining problems. 

Abstracts

Sommaire

BALOUIN Yan and HOWA Hélène : Morphodynamics of a swash bar in the context of the evolution of a swash platform associated to an ebb delta.

BALSON Peter S. : Holocene evolution of the Norfolk Banks.

BARLAS Baris, BEJI Serdar and NADAOKA Kazuo: Accurate modelling of orbital velocities near seabed using a nonlinear dispersive wave model.

BASTOS Alex, KENYON Neil, H. and COLLINS Michael B. : Symmetrical convergent bedload sand transport pattern associated with headlands: A preliminary indication from bedforms, sediment distribution and bathymetry.

BERNE Serge : Architecture, dynamics and preservation of marine sandwaves (large dunes).

BLONDEAUX Paolo, BROCCHINI Maurizio and VITTORI Giovanna: A model for sandwaves generation.

CAMENEN Benoït and LARROUDÉ Philippe : Numerical comparison of sediment transport formulae.

CHAUMILLON Éric, TESSON Michel, WEBER Nicolas and GARLAN Thierry : Indication of the last sea level lowstand and Holocene transgression on the Charente coast: preliminary results of the SIFADO seismic cruise.

COOPER Bill : Bristol Channel sediment regime.

FLEMMING Burg : The role of grain size, water depth and flow velocity as scaling factors controlling the size of subaqueous dunes.

FLEMMING Burg : On the dimensional adjustment of subaqueous dunes in response to changing flow conditions : a conceptual process model.

GARNAUD Sébastien, EHRHOLD Axel, GARLAN Thierry and TRENTESAUX Alain : Setting of atypical marine sandwaves by rotary currents : impact of island and shoal, Ecrehou archipelago in the local modification of tidal currents (Channel Islands, France).

GONDRET Philippe, RABAUD Marc and LOISELEUX Thomas : Erosion instability of a sediment in a two-dimensional set-up.

GUENNOC Pol and GALTIER Louis: EUMARSIN & EUROCORE groups : EU-SEASED : a searchable internet database of seabed samples held at european institutions.

HENNINGS Ingo, LURIN Blandine, VERNEMEN Carlos and VANHESSCHE Ulrike : On the behaviour of hydrodynamic processes due to the presence of submarine sandwaves.

HULSHER Suzanne J.M.H., KNAAPEN Michiel A.F. and SCHOLL Olaf : Regeneration of dredged sandwaves.

KNAAPEN Michiel A. F., HULSHER Suzanne J.M.H. and de VRIEND Huib J. : Data analysis of sandwaves in the North Sea.

LE BOT Sophie, IDIER Déborah, GARLAN Thierry, TRENTESAUX Alain and ASTRUC Dominique : Dune dynamics : from field measurements to numerical modelling. Application to bathymetric survey frequency in the Calais-Dover Strait

MALLET Cyril, KINGSTON K.S., DAVIDSON M.A. and HUNTLEY David A. : The use of video in the study of sandbar dynamics.

MARIN François : Experimental investigation of the wave-induced currents above rippled beds.

MICHEL Denis, HOWA Hélène, THOMAS Catherine, CHAPALAIN Georges, THAIS Laurent and MALENGROS Deny : Sediment dynamics and hydrodynamics on the inner part of the Aquitanian shelf (France) : Preliminary results.

MILLS Chris : Assessment of the impact of changes in bathymetry on the safety of navigation : The UKHO experience.

MOSHER David C. and THOMSON Richard E. : Massive submarine sand dunes in the eastern Juan de Fuca Strait, British Columbia.

NEMETH Attila A., HULSCHER Suzanne J.M.H., de VRIEND Huib J.: Modelling migration of sandwaves in shallow shelf seas.

POWELL Huw, VOULGARIS George, COLLINS Michael B. and BASTOS Alex, C.: Wave-current interaction over bedforms: observations and model predictions.

POWELL Huw, VOULGARIS George, COLLINS Michael B. and BASTOS Alex, C.: Sediment transport rates over bedforms: observations and model predictions.

REDDING John H.: Experimental manipulation of sandwaves to reduce their navigation hazard potential, Jade shipping channel, N. Germany.

RUBIN David M.: Time-lapse movies of migrating bedforms.

SABATIER François and PROVANSAL Mireille : Sandbar morphology on the Epiguette spit, Mediterranean Sea, France.

SCHÜTTENHELM Ruud T. E. : Grainsize variability and crest stability of a North Sea sandwave in space and time.

STOLK Ad : Variation of sedimentary structures and grainsize over sandwaves.

STOLK Ad : The role of sandwaves in the management of the Netherlands Continental Shelf.

VAN CAUWENBERGHE Carlos : Interrelationship between hydrography, sedimentology and modelling.

VAN LANCKER Vera R. M., HONEYBUN Steve D. and MOERKERKE Geert P.M. : Sediment transport pathways in the Broers Bank - Westdiep coastal system. Preliminary results.

VAN LANCKER Vera R.M. and JACOBS Patric : The dynamical behaviour of shallow-marine dunes.

WEVER Thomas F. and STENDER Ingo H.: Strategies for and results from the investigation of migrating bedforms in the German Bight.

WHITEHOUSE Richard J.S., DAMGAARD Jesper S. and LANGHORNE D. Nicholas : Sandwaves and seabed engineering; the application to submarine cables.

WILLIAMS J.J, BELL P. and THORNE P.D.: Flow, bedform migration rates and sediment transport in a tidal inlet.

[ Organisation | Présentation | Abstracts ]