评估浅和深含水层系统的补给过程(意大利西北部马焦雷山谷):水文地球化学和同位素方法

IF 2.4 3区 地球科学 Q2 GEOSCIENCES, MULTIDISCIPLINARY
Daniele Cocca, Manuela Lasagna, Chiara Marchina, Valentina Brombin, Luis Miguel Santillán Quiroga, Domenico Antonio De Luca
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引用次数: 1

摘要

马焦雷河谷井田在为皮埃蒙特地区(意大利西北部)提供饮用水方面发挥着重要作用,自20世纪初以来一直被集中开发。这种水资源存在于深层多层含水层系统中。本研究的主要目的是通过水化学和同位素评价来表征深层含水层的补给过程,以及补给和排水区的水质。为此,在2021年的两次采样活动中,对浅层和深层含水层复体采集的样品进行了128次物理化学分析(主要离子)和50次同位素分析(δ 18o和δ 2h)。在此基础上,建立了补给过程的水文地质概念模型。化学数据证实,在浅层和深层含水层复合体的大多数样品中存在碳酸氢盐-钙相。在被调查的部门之间观察到明显的水化学差异。补给区确定为(1)远区,即库尼奥平原的浅层含水层复群;(2)都灵地区Po平原河滨段地下水混合的浅层和深层含水层复群。在井田地区证实了库尼奥平原和都灵平原的混合水。自流井水的同位素值也证实了都灵和库尼奥阿尔卑斯山的贡献。本研究阐明了补给过程,从而确定了潜在的污染物途径,并为地下水资源的管理和保护提供了额外的支持。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Evaluation des processus de recharge d’un système aquifère peu profond et profond (vallée du Maggiore, nord-ouest de l’Italie): approche hydrogéochimique et isotopique

Evaluation des processus de recharge d’un système aquifère peu profond et profond (vallée du Maggiore, nord-ouest de l’Italie): approche hydrogéochimique et isotopique
Abstract The Maggiore Valley well field plays a fundamental role in supplying drinking water to a large territory of the Piedmont Region (northwestern Italy) and has been intensively exploited since the early twentieth century. This water resource is hosted in a deep, multilayered aquifer system. The main purpose of this study was to characterize the recharge processes of the deep aquifer through hydrochemical and isotopic assessments, as well as the water quality in the recharge and drainage areas. For this purpose, 128 physical–chemical analyses (major ions) and 50 isotopic analyses (δ 18 O and δ 2 H) were carried out on samples collected in shallow and deep aquifer complexes in two sampling campaigns in 2021. From the results, a hydrogeological conceptual model of recharge processes was developed. The chemical data confirm the presence of bicarbonate–calcium facies in most samples of the shallow and deep aquifer complexes. Clear hydrochemical differences were observed among the investigated sectors. The recharge areas were identified as (1) far zones, namely the shallow aquifer complex of the Cuneo Plain, and (2) the shallow and deep aquifer complexes with groundwater mixing in the riverside sector of Po Plain in the Turin area. The mixing of waters from the Cuneo Plain and Turin Plain was verified in the well field area. The isotopic values of the artesian well water also confirmed contributions from the Turin and Cuneo Alps. This study clarified the recharge processes, thereby defining potential pollutant pathways, and the results provide additional support for groundwater resource management and protection.
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来源期刊
Hydrogeology Journal
Hydrogeology Journal 地学-地球科学综合
CiteScore
5.40
自引率
7.10%
发文量
128
审稿时长
6 months
期刊介绍: Hydrogeology Journal was founded in 1992 to foster understanding of hydrogeology; to describe worldwide progress in hydrogeology; and to provide an accessible forum for scientists, researchers, engineers, and practitioners in developing and industrialized countries. Since then, the journal has earned a large worldwide readership. Its peer-reviewed research articles integrate subsurface hydrology and geology with supporting disciplines: geochemistry, geophysics, geomorphology, geobiology, surface-water hydrology, tectonics, numerical modeling, economics, and sociology.
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