A method for precise location and assessment of soil pollution based on geophysical detection technology

Abstract

The invention discloses a method for accurately positioning soil contamination based on geophysical exploration and an accurate estimation method. The method for accurately positioning soil contamination includes the following steps: on-site surveying, rapid exploration which covers entire site from the width perspective, further contamination body and availability positioning from the depth perspective, drilling sampling and analysis verification from specific point perspective, and accurate contamination level evaluation from the width perspective. In specific target sites or regions, the method herein adopts geophysical exploration technology which combines electromagnetic instruments, high density resistivity meters and ground penetrating radars in a step-by-step and targeted manner, can accurately position areas or points that are suspected to have soil contamination, arranges sapling points in a scientific manner, combines rapid site contamination pollution screening as well as drilling sampling, test and analysis, and establishes an entire set of soil pollution investigation procedures from the width perspective, the depth perspective and the specified point perspective. Themethod herein can rapidly and accurately position soil contamination, scientifically arrange sampling points, conducts soil contamination investigation that cover an entire region, and increases theprecision in estimating the contamination area.

Description

technical field [0001] The invention belongs to the technical field of environmental monitoring and relates to a method for precise positioning and accurate evaluation of soil pollution based on geophysical detection technology. Background technique [0002] In the past 30 years, with the rapid development of social economy and high-intensity human activities, the problem of soil environmental safety in my country has become increasingly prominent, which has attracted widespread attention from the society. "Carrying out soil pollution investigations and grasping the status of soil environmental quality" has become the primary task of the country's "Soil Pollution Prevention and Control Action Plan". Compared with water body and air pollution, soil pollution has the characteristics of inhomogeneity; due to differences in soil types and properties, as well as differences in pollutants and regional hydroclimatic characteristics, the diffusion, migration, degradation, and retent...

AI Technical Summary

Problems solved by technology

The overall points of the traditional survey method are relatively sparse, and the location of the points is chosen arbitrarily, and it is easy to miss the polluted area. Most of them can only estimate the overall soil pollution status of the site or region based on the "point exceeding standard rate".

Although the traditional soil pollution investigation point distribution method with the goal of "overall estimation" has an acceptable estimation accuracy for the average concentration of pollutants, the estimation accuracy for the spatial distribution (range) of pollution is low, which usually affects risk management and control decisions. and repair cost estimates

[0005] (2) Traditional survey methods are difficult to achieve "full coverage" surveys in the target area, resulting in flawed scope of application

[0017] However, no one has applied the combination technology of frequency domain electromagnetic induction instrument-high-density resistivity instrument-ground penetrating radar in a step-by-step and targeted manner to the investigation of site pollution environment. point", and finally return to the "surface" soil pollution investigation process

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