Abstract

FALCON, Carlos M. et al. Hydrogeological characterization of the Rio Guanchín, Chile Cito Valley, La Rioja, Argentina. Ser. correl. geol. [online]. 2019, vol.35, n.2, pp.1-15. ISSN 1666-9479.

The present work analyzes the hydrogeological characteristics of the groundwater in the Guanchín River Valley, Province of La Rioja. For this, antecedents of the geological, hydrogeological and hydrochemical character were collected, which were complemented in the field with hydraulic determinations and sampling of groundwater. Chemical analyzes were interpreted to determine the characteristics and evolution of the valley waters. The information provided by deep perforations made it possible to determine the presence of im-portant underground water reservoirs, especially in semi-confined and confined gravel-sandy levels, located between 80 and 170 m deep. The piezometric levels measured in the field vary between 30 and 50 m.b.b.p., the pumping flows between 60 and 160 m⁴/h and the specific yields between 2 and 6 m⁴/h/m. The waters have a dominant chemical composition of calcium bicarbonate to calcium sulfate, resulting in good to acceptable quality for irrigation and to a lesser extent for human consumption.

Keywords : Guanchín River Valley, Hydrogeology, Hydrochemistry, Exploitation.

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