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Nutrient export to an Eastern Atlantic coastal zone: first modeling and nitrogen mass balance ArchiMer
Canton, Mathieu; Anschutz, Pierre; Coynel, Alexandra; Polsenaere, Pierre; Auby, Isabelle; Poirier, Dominique.
We have studied 15 catchments supplying freshwater to a French Atlantic coastal lagoon, where increase in nitrogen loads due to agriculture is supposed to have destabilized the ecosystem in the last decades. The catchment is a lowland composed of Pleistocene sands with an average slope of 0.25%. To study the nutrient export in relation to land-use surface waters were sampled bi-weekly between October 2006 and January 2009 and land-use was established by plane photographs and Geographic Information System (GIS). Cultivated pine forests represent more than 80% of the total surface and 7% of the catchment area has been deforested recently. Significant areas of some catchments are used for maize crop. Housing is confined to the coastal zone. Maize and forest...
Tipo: Text Palavras-chave: Nitrogen; Phosphorus; River export; Land use; Coastal catchment; Arcachon Bay; Modeling; Mass balance.
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00065/17615/15173.pdf
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