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Chevalier Cristèle, Pagano Marc, Corbin Daniel, Arfi Robert. (2014). The salinity responses of tropical estuaries to changes in freshwater discharge, tidal mixing and geomorphology: case study of the man-affected Senegal River Estuary (West Africa). Marine and Freshwater Research, 65 (11), 987-1002. ISSN 1323-1650

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Lien direct chez l'éditeur doi:10.1071/mf13169

Titre
The salinity responses of tropical estuaries to changes in freshwater discharge, tidal mixing and geomorphology: case study of the man-affected Senegal River Estuary (West Africa)
Année de publication2014
Type de documentArticle référencé dans le Web of Science WOS:000344381700005
AuteursChevalier Cristèle, Pagano Marc, Corbin Daniel, Arfi Robert.
SourceMarine and Freshwater Research, 2014, 65 (11), p. 987-1002. ISSN 1323-1650
RésuméSalinity in estuaries is influenced by a variety of processes including tidal advection and diffusion and river discharge. The effect of hydrodynamic features on salinity was studied in the Senegal River Estuary (SRE). This estuary is of strategic importance for large populations, but it has been greatly affected by human action (regulation of the freshwater inflow, change in the location of the river mouth ...), which has caused major changes in salinity and ecological functioning. To analyse the impacts of these changes and to determine the spatial and temporal variations in salinity in the SRE, we used a combination of three-dimensional modelling and field measurements. The overall salinity depends on freshwater inflow and tidal fluctuations. Salinity variation is mainly driven by ebb and flood near the mouth and by fortnightly cycles upstream. The enlargement of the mouth increases salinity, whereas its shifting location changes the location of the salinity front and creates a slack water zone downstream. Connection and disconnection of the tributaries also affects the salinity. The present study explains how the recent modifications have increased spatial variation and reduced seasonal differences of salinity and provides a tool for managing the water in the estuary.
Plan de classementEcologie, systèmes aquatiques [036] ; Ressources halieutiques [040]
Descr. géo.SENEGAL DELTA
LocalisationFonds IRD [F B010062667]
Identifiant IRDfdi:010062667
Lien permanenthttp://www.documentation.ird.fr/hor/fdi:010062667

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