Differential electrical prospecting method for pollutant leakage detection

Abstract

The invention discloses a differential electrical prospecting method for pollutant leakage detection. The method comprises the following steps of firstly, arranging power supply electrodes A1 and B1 outside the pollutant landfill, and measuring the potential difference of measuring electrodes inside the pollutant landfill; power supply electrodes A2 and B2 being arranged in the pollutant landfill, and the potential difference of the measuring electrodes in the pollutant landfill being measured; and calculating differential leakage judgment parameters of all measuring points by using a corresponding algorithm, drawing a related map, analyzing according to a rule for judging a leakage point, judging whether leakage exists in the pollutant landfill, and if leakage exists, obtaining a plane coordinate position of the leakage point. The method can obviously weaken the interference information formed by the resistivity abnormal body at the shallow part in the pollutant landfill, so high-precision rapid judgment of the leakage of the pollutant landfill and the leakage position is improved. The method has advantages of low cost, high efficiency and high precision.

Description

technical field [0001] The invention relates to a differential electrical prospecting method for pollutant leakage detection, which belongs to the field of prospecting geophysics. This method can improve the accuracy of leakage judgment in pollutant landfills, and reduce the economic cost and time cost of exploration. Background technique [0002] With the development of society, the pollutants produced by humans have gradually increased, and a large number of pollutant landfills have been formed. Almost all pollutant landfills have different degrees of leachate leakage. There are four main sources of leachate: first, precipitation, which is the main source of leachate; second, surface runoff, which is mainly the runoff on the uphill direction of the site surface; second, groundwater; and finally, water content of pollutants, which not only includes The pollutant itself contains water, and also includes the organic components in the pollutant that are decomposed in the land...

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Problems solved by technology

[0006] At present, the main geophysical methods used for the leakage of pollutant landfills include high-density resistivity method, geological radar method, transient electromagnetic method, and geothermal method. The reason is that it has a wide range of applications, but relatively speaking, the exploration efficiency of high-density resistivity needs to be improved, the cost needs to be reduced, and its low-cost, high-efficiency monitoring function needs to be realized

[0007] There is an electrical method that realizes leakage point monitoring by arranging an electrical monitoring system at the bottom of the pollutant landfill. This method needs to arrange the corresponding monitoring system during the construction period of the landfill. The monitoring effect is very good, but This method has several limitations: 1. It is necessary to arrange the entire system during the construction period of the landfill site. For the landfill site without a monitoring system during the construction period, this method cannot be carried out; 2. Because the main electrodes of the monitoring system The system is built into the landfill, making it impossible or difficult to maintain if the electrode system fails

Therefore, the monitoring system is a good choice in terms of effect, but due to the above limitations, this method is not suitable for some landfills

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