The main aim of the present proposal is to assess, in the Western Andean Front, the magnitude and the spatiotemporal variability of deep groundwater flows and derived mountain block recharge using an original and direct collection of hydrogeological, lithological, and geophysical data. Specific objectives are:
– Obj. 1: Assess the spatial variation at depth of the Abanico Formation hydraulic properties to improve the understanding of Western Andean Front fault systems and their impacts on the water transference to alluvial aquifers.
– Obj. 2: Unravel the aquifer capacity of fractured rocks (i.e. Abanico Formation) and the critical zone extinction depth for groundwater flows and mountain block recharge mechanisms in the Western Andean Front of Central Chile.
– Obj. 3: Estimate the mountain block recharge mechanisms regarding their quantitative (flow) and qualitative (hydrogeochemistry) aspects and assess the vulnerability of deep groundwater flows to shallow water-store variations caused by current and future hydroclimatic changes in the Western Andean Front.
The study of borehole core lithological and hydraulic properties, groundwater geochemical composition, flow rates, together with spring hydraulic and hydrogeochemistry behaviors will help to fill a gap of knowledge about deep groundwater flows originating from the Principal Cordillera. This deep borehole and derived original information will therefore be used as an “eye” inside the deep Chilean Andes groundwater resources. Finally, it will be a useful observation point for multidisciplinary research due to the interest of national and international researchers to collect samples at depth and therefore will expand shared knowledge and national frontier research