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Assessment of groundwater contamination risk using hazard quantification, a modified DRASTIC model and groundwater value, Beijing Plain, China

机译:使用危害定量,改良的DRASTIC模型和地下水价值评估地下水污染风险,中国北京平原

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摘要

Groundwater contamination risk assessment is an effective tool for groundwater management. Most existing risk assessment methods only consider the basic contamination process based upon evaluations of hazards and aquifer vulnerability. In view of groundwater exploitation potentiality, including the value of contamination-threatened groundwater could provide relatively objective and targeted results to aid in decision making. This study describes a groundwater contamination risk assessment method that integrates hazards, intrinsic vulnerability and groundwater value. The hazard harmfulness was evaluated by quantifying contaminant properties and infiltrating contaminant load, the intrinsic aquifer vulnerability was evaluated using a modified DRASTIC model and the groundwater value was evaluated based on groundwater quality and aquifer storage. Two groundwater contamination risk maps were produced by combining the above factors: a basic risk map and a value-weighted risk map. The basic risk map was produced by overlaying the hazard map and the intrinsic vulnerability map. The value-weighted risk map was produced by overlaying the basic risk map and the groundwater value map. Relevant validation was completed by contaminant distributions and site investigation. Using Beijing Plain, China, as an example, thematic maps of the three factors and the two risks were generated. The thematic maps suggested that landfills, gas stations and oil depots, and industrial areas were the most harmful potential contamination sources. The western and northern parts of the plain were the most vulnerable areas and had the highest groundwater value. Additionally, both the basic and value-weighted risk classes in the western and northern parts of the plain were the highest, indicating that these regions should deserve the priority of concern. Thematic maps should be updated regularly because of the dynamic characteristics of hazards. Subjectivity and validation means in assessing the vulnerability result were also discussed. In addition, GIS technology was essential in completing the assessment work.
机译:地下水污染风险评估是用于地下水管理的有效工具。大多数现有的风险评估方法仅基于对危害和含水层脆弱性的评估来考虑基本的污染过程。考虑到地下水的开采潜力,包括受污染威胁的地下水的价值可以提供相对客观和有针对性的结果,以帮助决策。这项研究描述了一种结合了危害,内在脆弱性和地下水价值的地下水污染风险评估方法。通过量化污染物性质和渗透污染物负荷评估危害危害,使用改良的DRASTIC模型评估含水层的内在脆弱性,并根据地下水质量和含水层储量评估地下水价值。结合以上因素,得出了两个地下水污染风险图:基本风险图和价值加权风险图。基本风险图是通过叠加危害图和固有脆弱性图生成的。价值加权风险图是通过将基本风险图和地下水价值图叠加而成的。通过污染物分布和现场调查完成了相关的验证。以中国北京平原为例,生成了三个因素和两个风险的专题图。专题图表明,垃圾填埋场,加油站和油库以及工业区是最有害的潜在污染源。平原的西部和北部是最脆弱的地区,地下水价值最高。此外,平原西部和北部的基本风险类别和价值加权风险类别都最高,这表明这些地区应受到关注。由于危险的动态特性,应定期更新专题图。还讨论了评估漏洞结果的主观性和验证手段。此外,GIS技术对于完成评估工作至关重要。

著录项

  • 来源
    《Science of the total environment》 |2012年第15期|p.216-226|共11页
  • 作者单位

    Beijing Key Laboratory of Water Resources and Environmental Engineering, School of Water Resources and Environment, China University of Ceosciences, Beijing, 100083, China;

    Beijing Key Laboratory of Water Resources and Environmental Engineering, School of Water Resources and Environment, China University of Ceosciences, Beijing, 100083, China;

    Beijing Key Laboratory of Water Resources and Environmental Engineering, School of Water Resources and Environment, China University of Ceosciences, Beijing, 100083, China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    groundwater contamination risk; hazard; intrinsic vulnerability; groundwater value; beijing plain;

    机译:地下水污染风险;冒险;固有脆弱性;地下水价值;北京平原;
  • 入库时间 2022-08-17 13:54:45

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