RELATIONSHIP BETWEEN RAINFALL AND ELECTRICAL CONDUCTIVITY IN THE OUTCROP ZONE GUARANI AQUIFER SYSTEM

The current condition involving the quality and quantity of groundwater abstractions through wells. At present time there are several studies in groundwater that aim to analyze the occurrence or the way that this process occurs in the underground environment (aquifer). Recharge varies from year to year, depending on the amount of direct precipitation, its seasonal distribution, air temperature, land use, and other factors like geology. Therefore, this paper aims to relate the Electrical Conductivity (EC) in groundwater and variable rainfalls. We evaluated four wells on the campus of the Federal University of Santa Maria -RS, in the years 2012 and 2013. They penetrate the Guarani Aquifer System (SAG) at outcrop zone. The data was produced with a weekly frequency, using a Solinst water level meter TLC (Temperature, Level, and Conductivity). The TLC meter is ideal for profiling conductivity and temperature in wells. These parameters were compared with rainfall data, obtained from a weather station in the campus and ordered a weekly sum. Of the four wells studied, there was a decrease in EC because of rain, three of them disabled, in a pit no direct relationship. One active well there is no relationship this parameter probably associated to exploitation of groundwater reservoir. Therefore, it is inferred that the rainfall was a factor influencing the (EC) values on groundwater, at studied area.