ESTIMACIÓN DE LA RECARGA EN LA ZONA MEDANOSA DE PENÍNSULA VALDÉS Y SU TENDENCIA

TROVATTO, MARIA MARTA; BOUZA, PABLO; ALVAREZ, MARIA DEL PILAR; DAPEÑA, CRISTINA; GONZALEZ, NILDA; HERNANDEZ, MARIO

Relación Agua Subterránea Agua Superficial

Editorial Científica Universitaria, UNCA

Lugar: San Fernando del Valle de Catamarca; Año: 2016; p. 229 - 236

The sustainable use of groundwater involves not only the hydrogeological, hydrochemical and hydrodynamic knowledge, but also knowing the potentially extractable volume that would be recovered in a hydrological cycle, i.e. the aquifer recharge. The case study is the Peninsula Valdes, characterized by an arid climate and the absence of permanent surface courses. Its geographical features and hydrodynamic studies indicate that the unconfined aquifer recharge comes only from rainwater. The objective of this work is to estimate the recharge, over and aeolic field, by the use of the methods of fluctuation levels, chloride balance, soil water balance and mathematical modeling, and the analysis of the trend of the variables that condition it. In addition, climate variability and its impact on the recharge are analyzed. Advantages and disadvantages of each method are discussed. Results indicate different percentages of average recharge values: fluctuation levels between 9 and 19%, mass balance of chloride between 8 and 43% and soil water balance between 15 and 20%. It was found that the acceptable model adjustment is achieved with recharge values between 15 and 26% for the vegetated dunes area and in the order of 43% in active dunes (without vegetation). Then those ranges are taken as representative for the region Peninsula Valdes.