Monitoring and data processing methods for underground three-dimensional migration of LNAPLs

A data processing and three-dimensional technology, applied in the direction of material resistance, etc., can solve the problems of lack of three-dimensional migration data monitoring of LNAPLs pollutants, and achieve the effects of making up for discontinuous time, convenient operation and reasonable design

Inactive Publication Date: 2018-01-26
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The method and system for automatic monitoring of underground light non-aqueous liquid pollutants in this invention can only realize fixed-point monitoring in the vertical direction in the depth direction, and the three-dimensional migration data monitoring of LNAPLs pollutants is relatively lacking

Method used

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  • Monitoring and data processing methods for underground three-dimensional migration of LNAPLs
  • Monitoring and data processing methods for underground three-dimensional migration of LNAPLs
  • Monitoring and data processing methods for underground three-dimensional migration of LNAPLs

Examples

Experimental program
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Embodiment 1

[0031] Such as Figure 1-4 As shown, a method for monitoring the three-dimensional migration process of LNAPLs underground includes the following steps:

[0032] 1) Determine the suspicious pollutant source area in the monitoring area, determine the monitoring point of the pollution source, and obtain the characteristic LNAPLs pollutants in the monitoring area;

[0033] 2) Select groundwater and soil samples at the monitoring points of each suspected pollution source, obtain adaptive monitoring points, and obtain the range of resistivity changes after LNAPLs pollutants migrate to each point;

[0034] 3) Lay several rows of electrodes around each monitoring point. The electrodes are distributed in a grid shape. When the electrodes are laid, they are screwed into the drilling holes of the glass bracket to fix them. The electrode insertion depth is 5cm. The laid electrodes are connected to the electrodes through multi-core cables and stainless steel clamps. The transfer switch i...

Embodiment 2

[0050] As shown in figure: 1, a kind of monitoring method of LNAPLs underground three-dimensional migration process comprises the following steps:

[0051] 1) Determine the suspicious pollutant source area in the monitoring area, determine the monitoring point of the pollution source, and obtain the characteristic LNAPLs pollutants in the monitoring area;

[0052] 2) Select groundwater and soil samples at the monitoring points of each suspected pollution source, obtain adaptive monitoring points, and obtain the range of resistivity changes after LNAPLs pollutants migrate to each point;

[0053] 3) Lay several rows of electrodes around each monitoring point. The electrodes are distributed in a grid shape. When the electrodes are laid, they are screwed into the drilling holes of the glass bracket to fix them. The electrode insertion depth is 5cm. The laid electrodes are connected to the electrodes through multi-core cables and stainless steel clamps. The transfer switch is final...

Embodiment 3

[0070] Such as Figure 4As shown, when LNAPLs pollution is detected, the water level of LNAPLs-contaminated soil is changed, and the three-dimensional resistivity image is drawn before and after the water level rises. The three-dimensional resistivity image can reflect the approximate spatial scope of LNAPLs pollution, and the main pollution is 0.15- 0.5m range, this range is the water saturated zone and capillary zone, and the main source of deep pollution is the internal injection point. The resistivity of the topsoil layer is low, and the overall resistivity increases after the water level rises, and the abnormal range of high resistivity moves up obviously, which well reflects the redistribution characteristics of LNAPLs after the water level fluctuates. .0 software grid, and then draw the apparent resistivity profiles at different depths, the depth interval is 0.05m, and the measurement depth is 0.867 times the pole spacing. The x-axis represents the direction parallel t...

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Abstract

The invention provides a monitoring method for underground three-dimensional migration of LNAPLs. The monitoring method comprises the following steps: 1) determining a suspected pollutant source zonein a monitored area, determining the monitoring point locations of a source of pollution and acquiring pollutants; 2) acquiring the variation range of resistivity after the LNAPL pollutants migrate toeach point location; 3) constructing a three-dimensional high-density resistivity monitoring system from all the monitoring points; 4) inserting a resistivity feeler lever used for aiding the three-dimensional high-density resistivity monitoring system in monitoring; 5) acquiring real-time data and carrying out alarming; and 6) carrying out data processing. According to the monitoring and data processing methods for underground three-dimensional migration of LNAPLs, omnibearing real-time monitoring is realized through combined automatic and three-dimensional monitoring; the problem of uncontinuity of a three-dimensional resistivity monitoring device in the aspect of time is compensated via long-term real-time monitoring via the feeler lever; and monitoring data is corrected and a three-dimensional chart is drawn so as to more visually display the underground migration status of LNAPLs.

Description

technical field [0001] The invention relates to the technical field of environmental monitoring, in particular to a method for monitoring and data processing of LNAPLs underground three-dimensional migration process. Background technique [0002] my country is in a period of rapid economic development, and various petrochemical products are widely used. During the production, storage, use and transportation, it is inevitable that leakage will occur, thereby polluting the underground environment. [0003] In the field of existing environmental monitoring technologies, for example, the real-time automatic monitoring method and system for the diffusion of underground light non-aqueous liquid pollutants, CN103033540A, the real-time automatic monitoring method and system for the diffusion of underground light non-aqueous liquid pollutants, including monitoring points position; obtain the characteristic LNAPLs pollutants and the resistivity change range E after the characteristic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/08
Inventor 杨金生潘玉英贾永刚郭秀军
Owner ZHEJIANG OCEAN UNIV
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