HYDROGEOLOGY OF THE SERRA GERAL FORMATION, PARANÁ SEDIMENTARY BASIN, IN MATO GROSSO DO SUL STATE, BRAZIL

Giancarlo Lastoria; Osmar Sinelli; Chang Hung Kiang; Ian Hutcheon; Antônio Carlos Paranhos Filho; Didier Gastmans

HYDROGEOLOGY OF THE SERRA GERAL FORMATION, PARANÁ SEDIMENTARY BASIN, IN MATO GROSSO DO SUL STATE, BRAZIL

2006

The Serra Geral Formation is exposed over an area of 40,000 km², in the south-central region of the Mato Grosso do Sul State, and constitutes an important aquifer in this region. More than 61% of the population of the state is concentrated in this area, and this groundwater is used for public supply, as well as acting as a source of water for the expanding industrial and agricultural ativities. The aquifer is caracterized as unconfined, heterogeneous and with porous fissures. The regional importance of this aquifer prompted the present hydrogeological study, with emphasis on geological-structural, hydrodynamic and hydrochemical aspects, permitting a construction of a conceptual hydrological model for the Serra Geral Aquifer System for this area. This model indicates horizontal joints of great continuity as being the principal zones of circulation and accumulation of water, in contrast to the traditionally used model of vertical groundwater flow in the basalt.

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