La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Enhanced Benthic Nutrient Flux During Monsoon Periods in a Coastal Lake Formed by Tideland Reclamation
Auteurs :	Seok-Hwi Kim, Auteur ; Kangjoo Kim, Auteur ; Minhyung Lee, Auteur ; Hwa-Jin Jeong, Auteur ; Won-Jang Kim, Auteur ; Jong-Gyu Park, Auteur ; Jae-sam Yang, Auteur
Type de document :	Article
Dans :	Estuaries and Coasts (32(6) NOV 2009)
Article en page(s) :	1165-1175
Résumé :	Sediment and water quality were investigated in an artificial coastal lake (Saemangeum Lake, Korea) that was formed by constructing a 33-km long sea-dyke offshore from the mouths of two adjacent rivers, which discharge into the Yellow Sea. Sediment showed drastic increases in fine fraction (silt and clay) after the dyke construction. TN, TP, and OC contents in the sediment showed the similar spatial variation to that of fine fraction. A mixing model indicated benthic fluxes of nutrients such as PO4, NH4, and SiO2, which were considerably elevated during the summer monsoon season. It is revealed that this phenomenon was associated with the development of strong salinity stratification, elevated water temperature, and increased groundwater discharge. However, a change in the sedimentation environment due to dyke construction is suggested as the primary reason for the enhanced benthic fluxes.

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