Abstract
ABSTRACT The Santo Domingo-Salinas ranges represent a unique Natural Area in the south-central Pyrenees, and they were declarationas a Protected Landscape in 2015. Available biological and geological knowledge is extensive but lacks of information on groundwater quality. In this work we provide new hydrogeological results and integrate them with previously available hydrogeological data. To do so, we have: (i) compiled existing hydrogeological information, (ii) exhaustively developed an inventory of water points, (iii) sampled, analyzed and interpreted the hydrochemical facies detected, and (iv) developed a preliminary conceptual model for the hydrogeological functioning of the area. These information has been integrated in an map that displays the chemical analyses of the two new campaigns (Stiff diagrams), the flow rates and the three aquifer systems defined. This new information improves and synthetizes the knowledge of the hidrogeology of the Santo Domingo-Salinas ranges Protected Landscape and it will help in its future management and planning.
Highlights
The westernmost corner of the External Sierras in the South-Central Pyrenees (Spain) was declared as a Protected Landscape by the Aragonian Government in 2015 (Decree 52/2015, BOA 72, 11767-96)
Geology; the Santo Domingo-Salinas ranges represent the south-westernmost termination of the Pyrenean sole thrust separating the Pyrenean fold and thrust belt in the North from the Ebro foreland basin to the South
Calcium sulfated and sodium chloride waters are observed at the core of the anticline, were Triassic evaporites crop out (Calvin et al, 2017 and references therein)
Summary
The westernmost corner of the External Sierras in the South-Central Pyrenees (Spain) was declared as a Protected Landscape by the Aragonian Government in 2015 (Decree 52/2015, BOA 72, 11767-96). The Santo Domingo-Salinas ranges are characterized by some remarkable conditions:. . Climate; these ranges represent the transition between Mediterranean and Atlantic weather conditions. The former dominates the region and the latter is confined to the north slope of the range, where snow may last some weeks during winter time in the highest elevations (between 1000 and 1500 m). . Geology; the Santo Domingo-Salinas ranges represent the south-westernmost termination of the Pyrenean sole thrust separating the Pyrenean fold and thrust belt in the North from the Ebro foreland basin to the South. The complex evolution of the Pyrenean orogeny, especially during Eocene-Miocene times, has produced outstanding geological structures in the area such as large-scale conical geometries, folded thrusts and down-plunging folds, among others (Pueyo et al, 2020)
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