title: Hydrogeochemical variables regionalization--applying cluster analysis for a seasonal evolution model from an estuarine system affected by AMD.
abstract: This study describes the spatial evolution of the hydrogeochemical parameters which characterise a strongly affected estuary by Acid Mine Drainage (AMD). The studied estuarine system receives AMD from the Iberian Pyrite Belt (SW Spain) and, simultaneously, is affected by the presence of an industrial chemical complex. Water sampling was performed in the year of 2008, comprising four sampling campaigns, in order to represent seasonality. The results show how the estuary can be divided into three areas of different behaviour in response to hydrogeochemical variables concentrations that define each sampling stations: on one hand, an area dominated by tidal influence; in the opposite end there is a second area including the points located in the two rivers headwaters that are not influenced by seawater; finally there is the area that can be defined as mixing zone. These areas are moved along the hydrological year due to seasonal chemical variations.
authors: Centro de Investigación para la Ingeniería en Minería Sostenible, Escuela Técnica Superior de Ingeniería, Universidad de Huelva, Ctra. Palos de la Frontera, s/n, 21819 Palos de la Frontera, Huelva, Spain. grangil@uhu.es
authors: J A
authors: JA
authors: Grande
authors: B
authors: B
authors: Carro
authors: J
authors: J
authors: Borrego
authors: M L
authors: ML
authors: de la Torre
authors: T
authors: T
authors: Valente
authors: M
authors: M
authors: Santisteban
mesh_terms: D016000:Cluster Analysis; D004784:Environmental Monitoring / Q000379:methods*; D019015:Geologic Sediments; D007220:Industrial Waste / Q000032:analysis / Q000706:statistics & numerical data; D008906:Mining; D008956:Models, Chemical; D012621:Seasons; D013030:Spain; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014877:Water Pollution, Chemical / Q000706:statistics & numerical data*
chemical_list: D007220:Industrial Waste; D014874:Water Pollutants, Chemical