Latter of Drafting by Pesticide Contamination Risk on the Estiva Stream Watershed, Brazil

ABSTRACT The aims of this work was to determine risk areas with pesticide contamination on the Estiva stream watershed, a tributary of Uruçuí-Preto river, Brazil. Environmental data was used to determine layers of water way, infiltration and runoff with the transport of pesticide. The overlay of this information has generated a map with the risk areas with pesticide contamination. The basin had high human disturbance, with an increase of about 55% of land use and occupation by agricultural crops, in a period of approximately 27 years (1984-2011). An area of 269 Km2, correspondent to 11% of the basin area, has a high potential pesticide contamination risk, 45% medium contamination risk and 44% have little contamination risk.