Courants et transports sédimentaires dans la zone littorale : le rôle des courants orbitaux et de downwelling / Currents and sediment transport in the coastal zone: the role of orbital and downwelling currents

2001 ◽  
Vol 7 (1) ◽  
pp. 5-16 ◽  
Author(s):  
Arnaud Héquette
Keyword(s):  
Sediment Transport ◽  
Coastal Zone

Urban Wastewater Discharge and Bacteriological Quality of Receiving Coastal Waters: Processes and Modelling

1993 ◽  
Vol 27 (12) ◽  
pp. 223-226
Author(s):  
J.-F. Guillaud ◽  
M. Pommepuy ◽  
E. Dupray ◽  
J.-C. Salomon ◽  
B. Thouvenin
Keyword(s):  
Coastal Zone ◽  
Coastal Waters ◽  
Wastewater Treatment Plants ◽  
Enteric Bacteria ◽  
Wastewater Discharge ◽  
Urban Wastewater ◽  
Bacteria Transport

The aim of this paper is to present some results of bacterial studies which were developed by IFREMER in coastal discharge areas of urban wastewaters; they are focused on the determination of bacterial inputs by wastewater treatment plants, the role of environmental factors on the enteric bacteria survival in the coastal zone, and the modelling of bacteria transport and disappearance in order to provide useful management information for minimizing faecal pollution in the coastal zone.

scholarly journals Shoreline dynamics of Calypsostranda (NW Wedel Jarlsberg Land, Svalbard) during the last century

2011 ◽  
Vol 32 (1) ◽  
pp. 67-99 ◽  
Author(s):  
Piotr Zagórski
Keyword(s):  
Sediment Transport ◽  
Coastal Zone ◽  
Marine Terrace ◽  
Gps Measurements ◽  
Sediment Delivery ◽  
Shoreline Retreat ◽  
The North ◽  
Shoreline Dynamics ◽  
Morphogenetic Factors ◽  
Western Side

Shoreline dynamics of Calypsostranda (NW Wedel Jarlsberg Land, Svalbard) during the last century A 6 km long stretch of the coast of Calypsostranda between Skilvika and Joseph-bukta, situated on the western side of Recherchefjorden, was investigated. It is made of an accumulative marine terrace at a height of 2-8 m a.s.l. (terrace 1) and width of 40-180 m, divided by a cliffed section in the frontal moraines of Renardbreen. From the character and intensity of changes, the area was divided into 6 zones. The aim was to analyse the dynamics of changes within coastal zone from 1936 to 2007 and to characterise the influence of various morphogenetic factors (marine, fluvial, cryospheric). The important element of this study has been to determine sources and directions of sediment transport. The dynamics of changes of coastal zone in the Calypsostranda region was established from archival maps and precise GPS measurements for the periods: 1936-1960, 1960-1990, 1990-2000, 2000-2005, 2005-2006, 2006-2007. Comparing the extension of shoreline between 1936 and 2007 showed that there was more erosion than accumulation. Nearly 110 000 m2 of the area of terrace 1 decreased, whereas about 77 000 m2 appeared. The net balance for 1936-2007 was about -32 700 m2, on average over the whole length of the shoreline, it retreated by 5.7 m (0.08 m a-1). The cease of sediment delivery in the extramarginal sandur fans area of Renardbreen caused intensification of marine processes, that made the shoreline retreat by over 100 m. Continuing sediment delivery from the Scottelva catchment, with contribution of material from erosion of the north end of the shoreline studies, caused the aggradation of coastal zone by over 60 m near its mouth.

Diagnosis of the sediment transport in the Belgian Coastal Zone

2007 ◽  
Vol 74 (4) ◽  
pp. 670-683 ◽  
Author(s):  
C. Mercier ◽  
E.J.M. Delhez
Keyword(s):  
Sediment Transport ◽  
Coastal Zone

A Visual Interpretation of an ERS- I SAR Image of the Thames Estuary

1995 ◽  
Vol 48 (1) ◽  
pp. 97-104
Author(s):  
S. T. Culshaw
Keyword(s):  
Sediment Transport ◽  
Synthetic Aperture Radar ◽  
Coastal Zone ◽  
Synthetic Aperture ◽  
Sar Image ◽  
Visual Interpretation ◽  
Thames Estuary ◽  
Nautical Chart ◽  
Seabed Topography ◽  
Aperture Radar

This paper examines a Synthetic Aperture Radar (SAR) image of the Thames Estuary aided by the relevant nautical chart, tidal, weather and shipping information of the area. By correlating this information it is possible to identify gross sediment transport which would otherwise be hard and financially expensive to detect. Seabed topography, seabed pipelines, some shipping, coastal zone features and different water parcels can be identified.

Hydro-morphodynamic modelling of floodplains: the role of vegetation in suspended sediment transport

2020 ◽  
Author(s):  
Daniel A. S. Conde ◽  
Robert M. Boes ◽  
David F. Vetsch
Keyword(s):  
Sediment Transport ◽  
Suspended Sediment ◽  
Flow Resistance ◽  
Laboratory Data ◽  
Anthropogenic Factors ◽  
Future Research ◽  
Suspended Sediment Transport ◽  
Compound Channels ◽  
Closure Models

<p>Riverine environments are amongst the most complex ecosystems on the planet. As several anthropogenic factors have increasingly disrupted the natural dynamics of rivers, namely through stream regulation, the need for re-establishing the ecological role of these systems has gained relevance.</p><p>Of particular interest are floodplains in compound channels, primarily regarded for safety against floods, but which also comprise an extensive realm for ecological functions and establishment of various species. Floodplain vegetation affects flow resistance and dispersion, playing a fundamental role in erosion and deposition of suspended sediment.</p><p>The present work aims at quantifying the interaction between vegetation and suspended sediment transport on floodplains in compound channels by numerical simulations. The employed numerical tool is BASEMENT v3, a GPU-accelerated hydro-morphodynamic 2D model developed at the Laboratory of Hydraulics, Hydrology and Glaciology of ETH Zurich. In the context of the present study, the model is extended with turbulence and suspended sediment transport capabilities. The implemented closure models for turbulence pertain to three major groups, namely (i) mixing-length, (ii) production-dissipation and (iii) algebraic stress models. For suspended sediment transport, the main classical formulations from fluvial hydraulics were implemented in the numerical model.</p><p>Laboratory data from flume experiments featuring suspended sediment load and vegetation-like proxies are used for model validation. The numerical results are compared with the observed water depths, velocities and sediment concentrations for different sets of experiments with varying properties, such as density and submergence. The implemented closure models for flow resistance, turbulence and suspended sediment are then combined, calibrated and classified in terms of numerical output quality.</p><p>The obtained results from this modelling effort mainly contribute to understanding the applicability of 2D (depth-averaged) models to complex eco-morphodynamics scenarios. The calibration and rating of well-known closure models for turbulence and sediment transport provides relevant guidelines for both future research and practice in fluvial modelling.</p>

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