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现代地质 ›› 2024, Vol. 38 ›› Issue (03): 734-743.DOI: 10.19657/j.geoscience.1000-8527.2024.039

• 水土资源地球化学过程观测模拟与综合评价 • 上一篇    下一篇

基于多元分析的某地区垃圾填埋场地下水生态环境风险定量评价

龚莉1(), 史浙明1(), 张宗文2, 丁贞玉2, 韩琳琳1, 解子轩1, 程天威1, 张媛1   

  1. 1.中国地质大学(北京)水资源与环境学院,北京 100083
    2.生态环境部环境规划院,北京 100041
  • 出版日期:2024-06-10 发布日期:2024-07-04
  • 通讯作者: 史浙明,男,教授,1988年出生,主要从事地下水生态环境保护方向。Email: szm@cugb.edu.cn。
  • 作者简介:龚莉,女,博士研究生,2001年出生,主要从事地下水生态环境保护方向。Email:gongli_05@163.com
  • 基金资助:
    国家重点研发计划项目(2023YFC3709900)

Quantitative Ecological Risk Assessment on the Groundwater in Landfills at Regional Scale Based on Multivariate Analysis Methods

GONG Li1(), SHI Zheming1(), ZHANG Zongwen2, DING Zhenyu2, HAN Linlin1, XIE Zixuan1, CHENG Tianwei1, ZHANG Yuan1   

  1. 1. School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing 100083, China
    2. Chinese Academy of Environmental Planning, Beijing 100041, China
  • Online:2024-06-10 Published:2024-07-04

摘要:

随着城市化进程加快,城市生活垃圾的产量不断增加,许多城市形成了大量非正规垃圾填埋场,这类填埋场缺少防渗装置,产出的渗滤液对填埋场及其附近地下水、土壤等造成潜在污染风险。科学地评估此类垃圾填埋场的环境风险,对分类管理和治理垃圾填埋场以及科学地进行地下水污染防治具有重要意义。本文综合运用DRASTIC模型、层次分析法、聚类分析法等进行生态环境风险指标体系构建,以某地区14个垃圾填埋场为研究对象,评价其地下水生态环境风险。在评价过程中,主要考虑填埋场现状、填埋场的危险性、包气带的抗污能力、含水层脆弱性4个方面,依次对已选取的填埋场大小、实际填埋量、包气带黏性土层厚度等21个指标进行评价分级。结果显示,2号填埋场风险得分最低,为4.13分,5号填埋场风险得分最高,为7.95分,将填埋场评价得分进行分类后得到,3个垃圾填埋场风险指数为低风险,6个垃圾填埋场风险指数为中风险,5个垃圾填埋场风险指数为高风险。上述成果与前期专家打分评估的结果基本一致。本文提出的方法对于垃圾填埋场地下水污染风险具有参考意义,本研究成果对重点污染源风险的定量评价及科学管控也具有重要参考价值。

关键词: 垃圾填埋场, 地下水污染风险评估, 渗滤液, 层次分析法

Abstract:

The produced municipal wastes have been increasing with the urbanization process and many cities currently have formed a large number of informal landfills at the early stage.Those landfills produced leachate that poses a potential risk of contamination to the groundwater and soils due to lacking impermeable processing devices.A scie.pngic assessment on their environmental risks of those landfills is urgent for the classification and management of landfills as well as prevention of groundwater pollution.In this study, DRASTIC model, hierarchical analysis, cluster analysis, and other methods are used to construct an index system of assessment on ecological environment risks.Totally, 14 landfills in the study area were investigated as the research object to eva-luate the ecological environment risk of groundwater.Four aspects, the current status of the landfill, the danger of the landfill, the a.pngouling capacity of the unsaturated zone, and the vulnerability of the aquifer, were included in the assessment.Twenty-one indicators, such as the selected size of the landfill, actual amount of landfill, and thickness of the clay layer in the unsaturated zone, were evaluated and graded.The results show that landfill No.2 has the lowest risk score of 4.13, and landfill No.5 has the highest risk score of 7.95.After the categorization of evaluation scores of the landfills, we reached that the risk index of three landfills is in low risk, the risk index of six landfills is in medium risk, and the risk index of five landfills is in high risk.The results are generally consistent with the previous evaluation results by expert scoring, and the method proposed in this study has significant implications in managing the risk of groundwater contamination.The results of this study is also of important reference for the quantitative evaluation on the risk of key sources of contamination.

Key words: landfill, groundwater pollution risk assessment, leachate, analytic hierarchy process

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