Refined site investigation method based on remediation efficiency

Abstract

The invention discloses a refined site investigation method based on remediation efficiency. The refined site investigation method comprises the steps of performing site data arrangement and analysis,checking a heavily polluted region, correcting a range of a moderately polluted region, judging whether a lightly polluted region has pollution or not, and making a whole-field pollution partition grading diagram. For a specific soil pollution remediation site, a discrete point distribution sampling method, a density increased point distribution sampling method and an incremental point distribution sampling method are used in a targeted mode, the ranges of heavily, moderately and lightly polluted regions are precisely verified respectively, and finally a full-field-region pollution zoning andgrading graph is constructed in combination with sampling test analysis results. According to the refined site investigation method, precise identification of soil pollution of the contaminated remediation site is achieved, different site investigation methods are adopted for regions with different pollution degrees, the polluted region identification precision is improved, and the site remediation efficiency is improved.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a refined site investigation method based on restoration efficiency. Background technique [0002] In recent years, with the rapid economic development of our country, environmental problems have become increasingly prominent. In order to improve our country's environmental problems and promote the development of urbanization, cities have successively required industrial enterprises with serious environmental problems to relocate or demolish them. These enterprises left a large number of polluted sites after relocation. In 2014, my country issued five environmental standards including "Technical Guidelines for Site Environmental Investigation" HJ25.1-2014, which replaced the original HJ25-1999, providing technical guidance and support for the investigation of site environmental conditions in various places. Due to the differences in soil types and properties at different ...

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Problems solved by technology

However, there are obvious disadvantages in traditional risk assessment or site survey. The method of point layout usually adopts systematic point pattern, random point pattern, partition point pattern, etc. Among them: system point pattern is also called grid point pattern, which is mainly aimed at the different characteristics of soil pollution. Sampling points for plots that are clearly defined or severely damaged by the original condition of the site, the site is divided into several plots of equal area, and a detection point is arranged for each plot. The system layout method is affected by the size of the grid. The smaller the grid, the sampling The higher the accuracy is; for areas where the survey area of ​​the polluted site is too large, the soil characteristics are similar, and the soil use function is the same, when the corresponding monitoring points are initially arranged, the random point distribution method is usually used for soil sampling. There are certain requirements, and it is not suitable for areas where the soil environment is relatively complex, and because of the randomness of its point selection, the results are also very random, and the results are not representative of the overall soil situation; The main reason is that the original condition of the soil is well preserved, the functions of each block are clear, and the survey area is relatively large. The site can be divided into relatively uniform areas according to the original functional properties of the site, and points can be arranged according to the divided areas. This method can display detection Potentially contaminated areas of the region, but the division of the region has a greater impact on the obtained results

The commonly used spot survey size in the prior art is generally 40m*40m, and there is usually a large uncertainty in the boundary of the site pollution range obtained from this, so when the site is restored, it will increase the restoration cost and reduce the pollution of the site. repair efficiency

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