caa a22 4500 445814985 CHVBK 20180317145224.0 cr unu---uuuuu 170323e20110501xx s 000 0 eng 10.1007/s10040-011-0710-9 doi (NATIONALLICENCE)springer-10.1007/s10040-011-0710-9 Hydrogeological study of the intensely exploited aquifer of the Santa Croce leather-producing district, Tuscany (central Italy) [Elektronische Daten] [Sergio Grassi, Marco Doveri, Gianni Cortecci, Michele Amadori] Etude hydrogéologique de l'aquifère intensément exploité dans le district producteur de cuir de Santa Croce, Toscane (Italie centrale) A hydrogeological study was undertaken to define the groundwater circulation in the Santa Croce area (Tuscany, central Italy) where the existing multilayered aquifer has long been intensively exploited. Investigations carried out on about 150 wells revealed the existence of a deep piezometric depression (to 20m below sea level) which drains groundwater from the entire surrounding area. Samples from about 70 water points, collected twice in 2007, were analysed for major elements and stable isotope composition. Three major groups of waters, which mix in the study area, have been distinguished: (1) waters of the Ca-Mg-HCO3 type mainly flowing along the Arno River Plain; (2) waters of the Na-K-Cl/Ca-Mg-HCO3-SO4, type with SO4 content up to 275mg/L, inflowing from the Pisane Hills; (3) relatively high-salinity waters mainly of the Na-HCO3 type which, with Cl concentrations up to 750mg/L, likely arise from a normal fault located at the foot of the northern hills. The characteristics of the different components are greatly affected by significant modifying processes such as cation exchange and sulfate reduction. The achieved conceptual model suggests the southern hills as the main recharging area of the aquifer system from which water circulation, characterized by pathways of different length and depth, develops. Springer-Verlag, 2011 Piezometric map nationallicence Hydrochemistry nationallicence Isotopes nationallicence Conceptual models nationallicence Italy nationallicence Grassi Sergio Institute of Geoscience and Earth Resources (IGG), Italian National Research Council (CNR), Via Moruzzi, 56124, Pisa, Italy aut Doveri Marco Institute of Geoscience and Earth Resources (IGG), Italian National Research Council (CNR), Via Moruzzi, 56124, Pisa, Italy aut Cortecci Gianni Institute of Geoscience and Earth Resources (IGG), Italian National Research Council (CNR), Via Moruzzi, 56124, Pisa, Italy aut Amadori Michele Institute of Geoscience and Earth Resources (IGG), Italian National Research Council (CNR), Via Moruzzi, 56124, Pisa, Italy aut Hydrogeology Journal Springer-Verlag 19/3(2011-05-01), 671-684 1431-2174 19:3<671 2011 19 10040 https://doi.org/10.1007/s10040-011-0710-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10040-011-0710-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Grassi Sergio Institute of Geoscience and Earth Resources (IGG), Italian National Research Council (CNR), Via Moruzzi, 56124, Pisa, Italy aut NATIONALLICENCE 700 1- Doveri Marco Institute of Geoscience and Earth Resources (IGG), Italian National Research Council (CNR), Via Moruzzi, 56124, Pisa, Italy aut NATIONALLICENCE 700 1- Cortecci Gianni Institute of Geoscience and Earth Resources (IGG), Italian National Research Council (CNR), Via Moruzzi, 56124, Pisa, Italy aut NATIONALLICENCE 700 1- Amadori Michele Institute of Geoscience and Earth Resources (IGG), Italian National Research Council (CNR), Via Moruzzi, 56124, Pisa, Italy aut NATIONALLICENCE 773 0- Hydrogeology Journal Springer-Verlag 19/3(2011-05-01), 671-684 1431-2174 19:3<671 2011 19 10040 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer