基于三角模糊函数的污染场地分类评价研究

发布时间：2018-10-17 07:16

【摘要】：我国污染场地修复资源相对匮乏,如何对污染场地进行有效的管理,降低污染场地对群众及周边生态的危害成为了当下的环境热点问题。鉴于国内污染场地分类管理研究还处于起步阶段,本文以建立综合考虑风险等级和风险重要性的污染场地分类管理评价方法为切入点开展研究。回顾了美国和加拿大的污染场地分类管理评价体系,通过对比分析,了解到污染场地分类管理的核心理念是识别出较高风险的场地优先开展修复,而各国在识别污染场地风险方法上有着不同的层次框架、指标体系和评价方法。在分析了污染场地分类管理评价相关研究现状的基础上,提出了本文的研究方法和研究思路。借鉴加拿大污染场地分类评价的框架,从污染特性、污染物迁移途径和污染受体三个方面确定了分类管理评价体系的考虑因素,但是在指标体系和评价因子的筛选上,参考了国内外土壤和地下水污染风险评价的相关研究,注重结合我国污染场地调查的现状特点。研究提出了耦合风险等级和风险重要性的风险表达方式,对风险等级和风险重要性等级进行了无量纲化处理,使评价因子得以量化分析。特别是在评价因子的权重确定过程开展了专家调查,并采用层次分析法对专家调查结果进行分析,得出具有参考价值的评价因子权重赋值。构建了基于三角模糊函数的综合评价模型,在污染场地分类管理评价体系的层次结构的基础上,以三角模糊数描述评价因子的隶属度,探索形成了具有一定创新性的污染场地分类评价方法,可以根据污染场地的调查资料综合评价得出场地的风险等级,作为是否优先治理的参考依据。并将评价模型应用到某农药厂污染场地实例的评价,从该模型的评判结果识别出案例场地的风险等级为高度风险,表示该模型具有一定的可操作性,可以作为污染场地分类的参考工具。
[Abstract]:The remediation resources of contaminated sites in China are relatively scarce. How to effectively manage the contaminated sites and reduce the damage to the masses and the surrounding ecology has become a hot issue in the environment. In view of the fact that the research on classified management of contaminated sites in China is still in its infancy, this paper starts with the establishment of a comprehensive assessment method of classified management of contaminated sites considering risk levels and importance. This paper reviews the classification management evaluation system of contaminated sites in the United States and Canada. Through comparative analysis, it is found that the core idea of classified management of contaminated sites is to identify the sites with high risk and to carry out remediation first. However, different countries have different hierarchical framework, index system and evaluation method in identifying the risk of contaminated sites. Based on the analysis of the current research situation of classified management evaluation of polluted sites, the research methods and ideas of this paper are put forward. Based on the framework of classified assessment of Canadian pollution sites, the factors considered in the classification management evaluation system are determined from three aspects: pollution characteristics, pollutant transport pathways and pollution receptors, but in the selection of index system and evaluation factors, With reference to the relevant studies on the risk assessment of soil and groundwater pollution at home and abroad, the present situation of pollution site investigation in China is emphasized. The risk expression method of coupling risk level and risk importance is put forward, and the dimensionless treatment of risk grade and risk importance level is carried out, which makes the evaluation factor quantificational analysis. In particular, the expert investigation was carried out in the process of determining the weight of the evaluation factor, and the results of the expert investigation were analyzed by the analytic hierarchy process (AHP), and the weight assignment of the evaluation factor with reference value was obtained. A comprehensive evaluation model based on triangular fuzzy function is constructed. On the basis of hierarchical structure of classified management evaluation system of polluted site, the membership degree of evaluation factor is described by triangular fuzzy number. An innovative method of classification and evaluation of contaminated sites has been developed, which can be used as a reference for the priority treatment of contaminated sites by synthetically evaluating the risk levels of the sites according to the survey data of the contaminated sites. The evaluation model is applied to the evaluation of an agricultural pharmaceutical factory pollution site, and the risk grade of the case site is identified as high risk from the evaluation results of the model, which indicates that the model has certain maneuverability. It can be used as a reference tool for classification of contaminated sites.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：X820

【相似文献】