利用水文地球化学和同位素技术评估扎拉巴德沿海含水层(伊朗东南部)的地下水盐碱化过程

IF 4.9 Q2 ENGINEERING, ENVIRONMENTAL Groundwater for Sustainable Development Pub Date : 2024-06-29 DOI:10.1016/j.gsd.2024.101263
Masoumeh Nikbakht , Mohammad Nakhaei , Ata Shakeri , Vahab Amiri
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引用次数: 0

摘要

采用水文地质化学、多元统计分析和多同位素(δ18O、δD 和 δ34S)方法,确定了扎拉巴德沿海含水层地下水盐碱化的原因和过程。水化学面演化(HFE)图表明,Na-Cl 面是主要的水化学面。如吉布斯图所示,地下水化学主要受阳离子交换及其与硅酸盐岩相互作用的影响。δ18O、δD和δ34S的同位素组成分别在-3.17‰至-1.35‰(平均为-1.69‰)、-25.5‰至-9‰VSMOW(平均为-18.09‰)和-7.7‰至16.7‰V-CDT(平均为0.54‰)之间变化。地下水的盐碱化可能是由水的蒸发或蒸发岩的溶解引起的。从 δ18O 到 δD 的数据可以推断出这一点,这些数据表明大部分水量都低于 GMWL、IMWL 和 LMWL。d-excess 值从 -19.8‰ 到 5.36‰,进一步表明地下水在下渗之前已经蒸发。此外,δ34S-SO42- 和 SO42- 图之间的比较表明,蒸发岩的溶解是 SO42- 的主要来源。该含水层的水化学变化主要是由水与岩石的相互作用、离子交换和蒸发引起的。
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Evaluating the groundwater salinization processes in Zarabad coastal aquifer (southeastern Iran) using hydrogeochemical and isotopic techniques

Hydrogeochemical, multivariate statistical analysis, and multi-isotopic (δ18O, δD, and δ34S) approaches were used to identify the cause and process of groundwater salinization in the Zarabad coastal aquifer. The hydrochemical facies evolution (HFE) diagram suggests that the Na–Cl facies is the dominant hydrochemical facies. Groundwater chemistry is mostly influenced by cation exchange and its interaction with silicate rocks, as shown by the Gibbs plot. The isotopic composition of δ18O, δD, and δ34S varies from −3.17‰ to −1.35‰ (with an average of −1.69‰), −25.5‰ to −9‰ VSMOW (with an average of −18.09‰) and −7.7‰–16.7‰ V-CDT (with an average of 0.54‰), respectively. The salinization of groundwater may be caused by the evaporation of water or the dissolution of evaporites. This can be inferred from the δ18O to δD data, which indicates that a majority of water falls below the GMWL, IMWL, and LMWL. The d-excess value, ranging from −19.8‰ to 5.36‰, further suggests that the groundwater has undergone evaporation before infiltration. In addition, the comparison between the δ34S–SO42- and SO42− plots suggested that the dissolution of evaporites is the primary source of SO42−. Water chemistry changes in this aquifer is primarily caused by water-rock interaction, ion exchange, and evaporation.

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来源期刊
Groundwater for Sustainable Development
Groundwater for Sustainable Development Social Sciences-Geography, Planning and Development
CiteScore
11.50
自引率
10.20%
发文量
152
期刊介绍: Groundwater for Sustainable Development is directed to different stakeholders and professionals, including government and non-governmental organizations, international funding agencies, universities, public water institutions, public health and other public/private sector professionals, and other relevant institutions. It is aimed at professionals, academics and students in the fields of disciplines such as: groundwater and its connection to surface hydrology and environment, soil sciences, engineering, ecology, microbiology, atmospheric sciences, analytical chemistry, hydro-engineering, water technology, environmental ethics, economics, public health, policy, as well as social sciences, legal disciplines, or any other area connected with water issues. The objectives of this journal are to facilitate: • The improvement of effective and sustainable management of water resources across the globe. • The improvement of human access to groundwater resources in adequate quantity and good quality. • The meeting of the increasing demand for drinking and irrigation water needed for food security to contribute to a social and economically sound human development. • The creation of a global inter- and multidisciplinary platform and forum to improve our understanding of groundwater resources and to advocate their effective and sustainable management and protection against contamination. • Interdisciplinary information exchange and to stimulate scientific research in the fields of groundwater related sciences and social and health sciences required to achieve the United Nations Millennium Development Goals for sustainable development.
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