title: Application of a systemic approach to the study of pollution of the Tinto and Odiel rivers (Spain).
abstract: The province of Huelva in the SW of Spain presents high environmental contrasts: together with the great abundance of natural spaces, it shows the impacts of historical natural resources exploitation processes. In the Ria of Huelva, the effluents of the chemical industries must be added to the contaminating inputs of the Tinto and Odiel rivers, coming from the acid drainage of the mines located in the Iberian Pyrite Belt. This forced the Environmental Agency (AMA) to elaborate in 1987 an Effluent Remediation Plan in order to negate unacceptable environmental impacts. The application of a "grey box" systemic analysis to the AMD pollution, undergone by the Tinto and Odiel rivers has allowed to set a conclusive explanation of the sampling results observed for a period of 11 years, thus making available an overall view of the polluting process and, above all, an explanation of its partial aspects.
authors.affiliation: Grupo de Recursos y Calidad del Agua, Escuela Politécnica Superior, Universidad de Huelva, Palos de la Frontera Huelva, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Sainz
authors.forename: J A
authors.initials: JA
authors.lastname: Grande
authors.forename: M L
authors.initials: ML
authors.lastname: De La Torre
mesh_terms: D004784:Environmental Monitoring / Q000379:methods*; D007220:Industrial Waste; D008906:Mining; D011891:Rain; D045483:Rivers; D013030:Spain; D014865:Waste Disposal, Fluid; D014872:Water Movements; D014876:Water Pollution; D014877:Water Pollution, Chemical / Q000032:analysis*; D014881:Water Supply
chemical_list: D007220:Industrial Waste