Contaminated site soil groundwater remediation technical scheme comparison and selection method

Abstract

The invention discloses a contaminated site soil and underground water remediation technical scheme comparison and selection method. The method comprises the following steps: (1) establishing a repair technical scheme comparison and selection evaluation index system according to repair technical alternative schemes; (2) determining an evaluation index weight by adopting an AHP (Analytic Hierarchy Process) and an expert evaluation method; and (3) sorting alternative schemes by adopting a fuzzy comprehensive evaluation method, and determining an optimal restoration technical scheme. The evaluation index system provided by the invention accords with the actual condition of the repair project and has operability; the evaluation is more objective through the combination of qualitative analysis and quantitative analysis; a plurality of comprehensive evaluation methods are effectively integrated, so that the calculation of the index system model is more scientific; therefore, the method has objectivity, scientificity and practicability, and can provide theoretical and application basis for comparison and selection of domestic soil and groundwater remediation technical schemes.

Description

technical field [0001] The invention relates to the technical field of contaminated soil remediation, in particular to a method for comparing and selecting technical solutions for soil and groundwater remediation of contaminated sites. Background technique [0002] The soil and groundwater remediation work in developed countries started early, and with the support of a large number of cases and studies, they are in a leading position in both remediation technology and technology screening. The U.S. Environmental Protection Agency (EPA) first recognized that the traditional site restoration effect relies heavily on the subjective judgment of decision makers, and the decision makers' own knowledge may have limitations and instability, and are affected by cognitive biases and complex systems. There is a lot of uncertainty in itself. Therefore, based on CERCLA (Comprehensive Environmental Response Compensation and Liability Act) in 1988, EPA constructed a set of screening proce...

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Problems solved by technology

[0004] The disadvantages of the AHP method are: (1) less quantitative data and more qualitative components, it is not easy to be convincing, when there are too many indicators, the data statistics are large, and the weight is not easy to determine, and the precise calculation of eigenvalues ​​and eigenvectors is more complicated; (2) the used The index system needs the support of the expert system, if the index given is unreasonable, the result obtained will be inaccurate

[0005] The disadvantages of the Topsis+AHP method are: (1) It is more complicated to find the normative decision matrix, and it is not easy to find the positive ideal and negative ideal solutions, especially when the index values ​​of the two evaluation objects are connected to the positive ideal solution and the negative ideal solution When it is symmetrical, accurate results cannot be obtained; (2) This method is based on the analytic hierarchy process. When there are too many indicators, the weight is not easy to determine, the quantitative data is less, and the qualitative components are more, so the evaluation is subjective.

[0006] The disadvantages of the expert scoring method are: (1) relying entirely on experts, with strong subjectivity and many qualitative components; (2) the calculation process is too simple and the method is not scientific enough

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