Mapeamento do risco à contaminação do sistema aquífero Serra Geral no município de Chapecó - SC

Abstract

The Serra Geral Aquifer System is the most important and exploited groundwater reservoir in the municipality of Chapecó-SC. However, anthropic activities can cause contamination of this resource. In view of this, the objective of this work was to map the vulnerability, hazard and risk to contamination of the Serra Geral Aquifer System in the municipality of Chapecó, through the application of the GOD, POSH and mapping methods, respectively. For this, information on hydrogeology, pedology and static level of wells drilled in the region and registered in the Groundwater Information System was used. Through the GOD method, the vulnerability of the Serra Geral aquifer system was estimated as low in approximately 90% of the municipal area. However, 57% of the area of the municipality and 83% of the urban perimeter were classified as high hazard. This means that approximately half of the Serra Geral Aquifer System area in the municipality has a high risk. And in the urban perimeter this percentage of area is even greater, 71%. These results demonstrate the need for adequate planning with regard to the location of both new wells and anthropogenic activities. The maps generated can be used as a tool for the territorial planning of the municipality.