『Abstract
　Flows of different hierarchy, which travel through limestone, schist, sandstone and ultra-basic rocks, with ages from the Paleocene to the Jurassic, at Sierra del Rosario, Pinar del Rio（iの頭は´）, Cuba, were characterized. The waters were sampled from 1984 until 2004 and the data were statistically processed by means of chemical equilibrium and physico-chemical models, under a flow system view of interpretation. results demonstrate that the physico-chemical properties of the water are controlled by water-rock interaction resulting from residence time since rainwater infiltrate and the path if follows to the discharge zone and the type of aquifer material the different groundwater flows are in contact with. Geochemical indices allow the definition of the different types of flow (local, intermediate, regional) to be characterized, permitting a further definition of the different flow systems and rock type involved, as well as its use for water supply and medical use. The main geochemical processes which control the chemical composition acquisitions mode are: congruent dissolution of calcite, dolomite, and halite; incongruent dissolution of plagioclase and microcline minerals; pyrite oxidation, sulphate reduction, and silica dissolution at the surface or silica precipitation at deep saturation and circulation zones.

Keywords: Groundwater flow system; Carbonate aquifer; Karst; Geochemical process; Hydrogeochemical characterization; Pinar del Rio（iの頭は´）; Cuba』

Introduction
Site description
Geological framework
Hydrogeological framework
Materials and methods
Results and discussion
　Groundwater groups
　Temperature and mineralization variation
　Flow systems and chemical composition of groundwater
Conclusions
Acknowledgments
References