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首页> 外文期刊>Environmental Pollution >Assessing the hydrogeochemical processes affecting groundwater pollution in arid areas using an integration of geochemical equilibrium and multivariate statistical techniques
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Assessing the hydrogeochemical processes affecting groundwater pollution in arid areas using an integration of geochemical equilibrium and multivariate statistical techniques

机译：结合地球化学平衡和多元统计技术评估干旱地区影响地下水污染的水文地球化学过程

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摘要

Rapid economic expansion poses serious problems for groundwater resources in arid areas, which typically have high rates of groundwater depletion. In this study, integration of hydrochemical investigations involving chemical and statistical analyses are conducted to assess the factors controlling hydrochemistry and potential pollution in an arid region. Fifty-four groundwater samples were collected from the Dhurma aquifer in Saudi Arabia, and twenty-one physicochemical variables were examined for each sample. Spatial patterns of salinity and nitrate were mapped using fitted variograms. The nitrate spatial distribution shows that nitrate pollution is a persistent problem affecting a wide area of the aquifer. The hydrochemical investigations and cluster analysis reveal four significant clusters of groundwater zones. Five main factors were extracted, which explain >77% of the total data variance. These factors indicated that the chemical characteristics of the groundwater were influenced by rock water interactions and anthropogenic factors. The identified clusters and factors were validated with hydrochemical investigations. The geogenic factors include the dissolution of various minerals (calcite, aragonite, gypsum, anhydrite, halite and fluorite) and ion exchange processes. The anthropogenic factors include the impact of irrigation return flows and the application of potassium, nitrate, and phosphate fertilizers. Over time, these anthropogenic factors will most likely contribute to further declines in groundwater quality. (C) 2017 Elsevier Ltd. All rights reserved.
机译：快速的经济扩张给干旱地区的地下水资源带来了严重的问题，这些地区的地下水枯竭率很高。在这项研究中，进行了涉及化学和统计分析的水化学研究的整合，以评估控制干旱地区水化学和潜在污染的因素。从沙特阿拉伯的Dhurma含水层收集了54个地下水样品，并对每个样品检查了21个理化变量。盐度和硝酸盐的空间分布图使用拟合的变异函数图绘制。硝酸盐的空间分布表明，硝酸盐污染是一个持续存在的问题，影响着含水层的广泛区域。水化学研究和聚类分析揭示了四个重要的地下水带簇。提取了五个主要因素，这些因素解释了总数据差异的> 77％。这些因素表明，地下水的化学特性受岩水相互作用和人为因素的影响。通过水化学研究验证了确定的簇和因素。地质成因包括各种矿物（方解石，文石，石膏，硬石膏，岩盐和萤石）的溶解和离子交换过程。人为因素包括灌溉回流的影响以及钾，硝酸盐和磷酸盐肥料的施用。随着时间的流逝，这些人为因素最有可能导致地下水质量进一步下降。 （C）2017 Elsevier Ltd.保留所有权利。

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  • 来源
    《Environmental Pollution》 |2017年第10期|760-770|共11页
  • 作者

    El Alfy Mohamed; Lashin Aref; Abdalla Fathy; Al-Bassam Abdulaziz;

  • 作者单位

    King Saud Univ, Prince Sultan Inst Environm Water & Desert Res, PSIPW Chair, Riyadh, Saudi Arabia|Mansoura Univ, Fac Sci, Geol Dept, Mansoura, Egypt;

    King Saud Univ, Coll Engn, Petr & Nat Gas Engn Dept, Riyadh, Saudi Arabia|Benha Univ, Fac Sci, Geol Dept, Banha, Egypt;

    King Saud Univ, Sci Res Chairs, Riyadh, Saudi Arabia|South Valley Univ, Fac Sci, Geol Dept, Qena, Qena Governorat, Egypt;

    King Saud Univ, Coll Sci, Geol & Geophys Dept, SGS, Riyadh, Saudi Arabia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Groundwater contamination; Factor analysis; Cluster analysis; Water-rock interactions; Dhurma aquifer;

    机译：地下水污染;因子分析;聚类分析;水岩相互作用;杜马含水层;

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