Multi-criteria potential groundwater contamination and human activities: Araras watershed, Brazil

Autor: Fabíola Geovanna Piga, Nícolas Guerra Rodrigues Tão, Mayara Herrmann Ruggiero, Darlan de Souza Marquezola, Welliton Leandro de Oliveira Boina, Carlos Wilmer Costa, José Augusto de Lollo, Reinaldo Lorandi, Edson Augusto Melanda, Luiz Eduardo Moschini
Jazyk: English<br />Portuguese
Rok vydání: 2017
Předmět:
Zdroj: Revista Brasileira de Recursos Hídricos, Vol 22 (2017)
Druh dokumentu: article
ISSN: 2318-0331
DOI: 10.1590/2318-0331.0217170052
Popis: ABSTRACT Assessment of groundwater contamination potential using geological, hydrological and hydrogeological attributes, is an efficient mechanism of sub-surface water resources protection and conservation. However, usually this method does not take into consideration the potentially polluting human activities, either in punctual or diffuse sources, or because the relative importance of the attributes are not considered. The paper proposes a multi-criteria approach as a way of solving this gap, reducing subjectivity and considering land use/cover due human actions influence in the process. The study was developed in Araras river watershed (Paraná Basin, Brazil) using rock, groundwater, relief, soils, and land use/land cover classification, employing multi-criteria analysis and data of contamination sources. The potential contamination classification showed the predominance (54% of the area) of very high and high potential, especially due to geological environment conditions (exploitation areas and groundwater recharge of the Itararé Aquifer - clastic sedimentary and free flow). The contaminant sources analyzed are located mainly in higher potential contamination areas.
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