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O uso inadequado e a ocupacao desordenada dos solos por atividades antropicas tem ocasionado graves alteracoes ambientais. Dentre elas, destacam-se as modificacoes nos parâmetros quimicos, fisicos e biologicos dos recursos hidricos, acarretando no declinio das caracteristicas quantitativas e qualitativas das aguas. Nas bacias hidrograficas, alteracoes nos padroes de qualidade dos corpos d’agua podem ser identificadas por meio do monitoramento da qualidade da agua. Porem, frequentemente, apenas a analise pontual nao permite uma visao ampla do comportamento dessas mudancas na bacia. Sendo assim, o presente trabalho visa explorar os campos do Geoprocessamento, por meio do software ArcGis 10.2.2, a fim de se obter mapas interpolados do tipo IDW englobando parâmetros de qualidade da agua, abordados pela Resolucao CONAMA no 357/05, selecionados de acordo com as atividades economicas preponderantes na Bacia Hidrografica do Rio Piracicaba (MG), objeto de estudo do artigo em questao. Por meio dos resultados obtidos, pode-se verificar que a bacia em analise sofre grandes perturbacoes em decorrencia ao porte de atividades economicas de elevado impacto ambiental, expondo temperatura, teor de ferro dissolvido, alcalinidade, teor de nitrato e nitrito e a demanda biologica de oxigenio (DBO) alterados de acordo com o municipio e sua pratica predominante. Isso porque, suas principais atividades economicas sao a agricultura de subsistencia, papel e celulose, siderurgia e a mineracao de ferro. A fim de reverter este quadro, torna-se indispensavel um rigido monitoramento e controle dos rejeitos lancados nos corpos hidricos dessa bacia. Normal 0 21 false false false PT-BR X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Tabela normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Calibri","sans-serif";} A B S T R A C T Improper use and the disorderly occupation of land by human activities have caused serious environmental changes. Among them there are the changes in chemical, physical and biological parameters of water resources, resulting in reduction of quantitative and qualitative characteristics these. The river basins, changes in the quality standards of water bodies can be identified by monitoring of water quality. But often only the specific analysis does not allow a comprehensive view of the behavior of these changes in the basin. Thus, this study aims to explore the fields of geoprocessing, through the ArcGis 10.2.2 software in order to obtain interpolated maps of the type IDW encompassing quality parameters of water, covered by CONAMA Resolution No. 357/05, selected according to the preponderant economic activities in the basin of Rio Piracicaba (MG), study area of the article in question. Through the results obtained, it can be seen that the basin in question suffer major disruption due to the size of economic activities of high environmental impact, exposing temperature, dissolved iron content, alkalinity, nitrate content and nitrite and biological oxygen demand (BOD) change according to the municipality and its predominant practice. This is because its main economic activities are subsistence agriculture, pulp and paper, steel and iron ore mining. In order to reverse this situation, it is essential to a strict monitoring and control of waste released into water bodies of the basin . Keywords: GIS, placement of water bodies, water resources.

Use of GIS for quality parameters water analysis: A case study in the hydrographic basin of Piracicaba-MG river