Deciphering the origin of groundwater inflow into the Talave tunnel (SE Spain).

The Talave tunnel (TT) is an infrastructure of a major water transfer from the Tajo river basin (center Spain) to the Segura river basin (SE Spain), crossing the Júcar river basin. The tunnel was drilled between 1969 and 1978. It is 32 km long, N/NW-S/SE oriented, has a maximum depth of 320 m, intersects several aquifers, and its southern stretch follows the eastern boundary of the Alcadozo aquifer.

First conceptual hydrogeological model of two intermountain Andean basins based on isotopes and hydrochemistry.

Mountains arid environments are vulnerable under climate change scenarios. Variations in the recharge sources and the rising temperature can affect the water availability, threaten the socio-productive systems on local and regional scales. In this sense, two hydrological systems were studied in the Andes Range, Argentina, by hydrochemical and isotope techniques, with the purpose to understand the origin of water, the groundwater recharge, and to conceptualize the groundwater flow system.

Hydrological dataset of a sub-humid continental plain basin (Buenos Aires, Argentina).

The Chaco-Pampean Plain (Argentina) is the strongest economic region and the most inhabited in the country, comprising approximately 66% of the country's population (26,500 million) [1]. In this region, surface slopes are very low (<0.1%) and due to the current climatological features, floods and droughts alternate over time.

Using isotope data to characterize and date groundwater in the southern sector of the Guaraní Aquifer System.

The Guaraní Aquifer System (SAG) is the largest transboundary aquifer in Latin America, extending beneath parts of Brazil, Paraguay, Argentina, and Uruguay. This paper presents the results of recent hydrogeological studies in the southern portion of the SAG. Locally, the abundance of surface water bodies precluded the use of conventional hydrological tools to characterize groundwater flows.

Integrating soil water and tracer balances, numerical modelling and GIS tools to estimate regional groundwater recharge: Application to the Alcadozo Aquifer System (SE Spain).

Groundwater recharge is one of the key variables for aquifer management and also one of the most difficult to be evaluated with acceptable accuracy. This is especially relevant in semiarid areas, where the processes involved in recharge are widely variable. Uncertainty should be estimated to know how reliable recharge estimations are.

Groundwater intensive use and mining in south-eastern peninsular Spain: Hydrogeological, economic and social aspects.

Intensive groundwater development is a common circumstance in semiarid and arid areas. Often abstraction exceeds recharge, thus continuously depleting reserves. There is groundwater mining when the recovery of aquifer reserves needs more than 50years.