Poluição das águas por herbicidas utilizados no cultivo do arroz irrigado na região central do Estado do Rio Grande do Sul, Brasil: Predição teórica e monitoramento

• Autor(a) principal: Primel, Ednei Gilberto
• Data de Publicação: 2005
• Outros Autores: Zanella, Renato, Kurz, Márcia Helena Scherer, Gonçalves, Fábio Ferreira, Machado, Sérgio Luiz de Oliveira, Marchesan, Enio
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da FURG (RI FURG)
• Texto Completo: http://repositorio.furg.br/handle/1/4417
• topic: herbicides; water pollution; irrigated rice fields

This article presents an evaluation of the pollution of river water by herbicides used in the culture of irrigated rice in Rio Grande do Sul State, Brazil. Firstly, a theoretical evaluation was made using the approaches suggested by EPA-USA, the “Groundwater Ubiquity Score” index and the Goss method to estimate the pollution possibilities. Afterwards, a monitoring program was established for the rivers of the area from 2001 to 2003 to investigate the presence of herbicide residues. The results indicate that the herbicides clomazone and propanil are the ones with larger presence and frequency in the analyzed samples. The theoretical forecast was confirmed by the results of the monitoring program.