Abstract
The paper presents hydrogeologic parameters for the Bauru Aquifer System in the area of Araguari, state of Minas Gerais, Brazil. The public water supply system is based on groundwater exploration. It operates 96 deep wells responsible for a total water discharge up to 1900 m 3 /h, resulting in average yield of 19.5 m 3 /h. The Bauru Aquifer System shows the following values for the dimensional parameters: the saturated thickness is 33 meters, the thickness of the vadose zone varies from 7 up to 36 meters, the effective porosity of the conglomerate facies is 19.5%, the effective porosity of the sandy facies is 12.7%, the hydraulic conductivity ranges from 5 x 10 -6 to 1.6 x 10 -4 m/s, with an average of 3.1 x 10 -5 m/s, the average transmissivity is 9.6 x 10- 4 m 2 /s, the average well discharge is 19.5 m 3 /h, and the average specific capacity is 1.3 m 3 h/m. The wide variation of values results from the bad conditions of construction of the wells.
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