Dynamics of coarse particulate matter in the turbidity maximum zone of the Gironde Estuary - 27/05/14
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Abstract |
There is a lack of studies devoted to coarse particulate matter (CPM) in estuaries, although this fraction can disturb activities that filter large volumes of water, such as industrial or fishery activities. In the macrotidal and highly-turbid Gironde Estuary, a monthly sampling of CPM was performed in 2011 and 2013 at two stations in the Turbidity Maximum Zone (TMZ) to understand its seasonal, tidal and hydrological dynamics. Regardless of the season and station, low quantities of CPM (few gm−3) were observed in comparison with suspended particulate matter (several 103gm−3). The highest concentrations were consistently recorded in bottom waters and at the upstream station. Whereas there is no clear link between the CPM present in the column water and spring or neap tides, an increase in the CPM size has been identified at the two stations after a flood event, fact potentially critical regarding filtering functioning of estuarine activities.
Le texte complet de cet article est disponible en PDF.Keywords : Gironde Estuary, Coarse Particulate Matter (CPM), Coarse Particulate Organic Carbon (CPOC), Concentrations, Budgets
Plan
Vol 346 - N° 1-2
P. 28-36 - janvier 2014 Retour au numéroBienvenue sur EM-consulte, la référence des professionnels de santé.
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