Analysis of salinization processes in the coastal carbonate aquifer of Porto Torres (NW Sardinia, Italy)

被引:66
作者
Ghiglieri, Giorgio [1 ,2 ]
Carletti, Alberto [2 ]
Pittalis, Daniele [2 ,3 ]
机构
[1] Univ Cagliari, Dept Earth Sci, I-09127 Cagliari, Italy
[2] Univ Sassari, Desertificat Res Grp NRD, I-07100 Sassari, Italy
[3] Univ Sassari, Dept Territorial Engn, I-07100 Sassari, Italy
关键词
Salinization; Carbonate coastal aquifer; Groundwater; Desertification; Sardinia-Italy; SEAWATER INTRUSION; AREA; DEGRADATION; DYNAMICS; GEOLOGY; SYSTEM; GREECE; LAND;
D O I
10.1016/j.jhydrol.2012.02.016
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
The Porto Torres (NW Sardinia) coastal aquifer is hosted in the carbonate rocks of the Miocene succession, which fills a NNW oriented half-graben. This aquifer is an important contributor to the fresh water supply of the local area. It is increasingly being degraded by salinization processes, mainly associated with intense groundwater over-exploitation. A combined hydrochemical and hydrogeological study has been carried out to identify the origin of the salinity in the groundwater. The behavior of the major ions showed that the changes in the chemical composition of the groundwater have been mainly controlled by the encroachment of seawater, accompanied by cation exchange reactions. Since seawater intrusion is a dynamic process, an Hydrochemical Facies Evolution Diagram, HFE-D (Gimenez Forcada, 2010) approach was taken to establish whether the aquifer was in the seawater intrusion or in the freshening phase. The assessment model developed provides regional authorities with a basic tools for sustainable water management in the framework of multi-disciplinary research activities aiming to combat and/or mitigate desertification and land degradation processes. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码:43 / 51
页数:9
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