Avaliação de mananciais subterrâneos e superficiais da bacia do Córrego Sossego considerando o uso para abastecimento doméstico e irrigação: contaminação por agrotóxicos

• Autor(a) principal: Amaral, Amanda de Barros
• Data de Publicação: 2011
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da Universidade Federal do Espírito Santo (riUfes)
• Texto Completo: http://repositorio.ufes.br/handle/10/10253
• topic: Agricultural chemicals; Water - Quality; Watersheds; Mathematical models; Leaching; Sossego, stream, Basin (ES); Engenharia Sanitária; Produtos químicos agrícolas; Bacias hidrográficas; Água - Qualidade; Modelos matemáticos; Lixiviação; Sossego, Córrego, Bacia (ES); 628

Improper use of pesticidas can lead to contamination of air, soil, surface and undergroundn water sources, causing negatives effects on terrestrial organisms, aquatics and human health. This study aimed to evaluate the surface and groundwater sources Basin Stream Sossego (Itarana-ES), considering its use for domestic supply and irrigation, as to the potential contamination by pesticides. Thus, evaluating physico-chemical and microbiological water quality. Was also carried out an assessment of the potential risk of water contamination by leaching of the active ingredients of pesticides applied in the basin, using mathematical models, “screening”, ie GUS index and method of GOSS. This result has prioritized 05 active ingredients with high potential for leaching and monitoring of surface water and groundwater for the presence of residues. The collection of water samples was carried out monthly between May and December 2010, at 4 points along the creek Sossego and three shallow wells to collets groundwater. Although the study area has a high potential for contamination by pesticides, the active ingredients were not found during the monitoring period, the water samples analyzed. Some surface water samples showed inconsistency with regard to legislation CONAMA nº 357/2005 for rivers of Classe 2 relating to contamination by fecal coliform (E. coli), dissolved oxygen (OD), BOD, and color, compromising the use in irrigation of vegetables and fruit trees. Groundwater had indicators of poor health, since they were detected presence of E. coli and nitrate values higher than those determined by the standards of potability, compromising the use for supplies.