A refuse landfill underground water pollution restoration threshold determination method and system

Abstract

The invention discloses a refuse landfill underground water pollution restoration threshold determination method and system, and the method comprises the steps of building a primary evaluation system,and carrying out the primary evaluation of environmental risks; dividing the risk into three levels according to the risk index, and formulating a corresponding repair threshold according to the levels; according to a target concentration method, calculating a restoration threshold value of the landfill with the risk grade being an intermediate grade; and using a health risk evaluation method toformulate a restoration threshold value of the polluted site with an advanced risk level. For landfills with intermediate risk levels and high risk levels, the migration and transformation process ofunderground water in the hydraulic gradient direction is numerically simulated, and landfill pollution remediation thresholds are deduced. According to the method, the formulation procedure of the remediation threshold of the medium-high risk contaminated site is simplified, the workload is reduced, and the pertinence and accuracy of the remediation threshold of the contaminated site in the high risk area are enhanced.

Description

technical field [0001] The invention relates to the field of groundwater environment evaluation and restoration, and more particularly relates to a method and system for determining the threshold value of groundwater pollution restoration at a landfill site. Background technique [0002] With the development of the economy, the municipal solid waste has increased dramatically. A large amount of landfill leachate is produced during the landfill process of garbage. If it is not handled properly, it will leak and pollute the environment. Some early domestic waste landfills in my country did not use or only adopted simple anti-seepage treatment facilities, which could not avoid the leakage of leachate during operation, which would cause certain risks to soil and groundwater. Although some sanitary landfills of domestic waste in my country have taken environmental protection engineering measures such as anti-seepage, compaction, covering and collection systems in structural desi...

AI Technical Summary

Problems solved by technology

However, since my country is still a developing country and its economic strength is not yet strong, considering the safety of human settlements, the area of ​​polluted sites and the cost of remediation, it is necessary to consider the characteristics of pollutants, the environmental characteristics of polluted sites and the exposure of potential pollution receptors around them. Different risk level values ​​are adopted for different risk levels, rather than conservative calculations that are treated equally, which increases the cost and difficulty of site restoration

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