Leakage Pollution Monitoring Research of Municipal Landfill Based on the Resistivity Method

Key words: 
• resistivity method /
• landfill leakage /
• groundwater pollution /
• distributed electrical method

Abstract: [Introduction] The traditional environmental geophysics method is one of the main solutions of monitoring liquid leakage of hazardous liquids in landfills. However, such methods have the defects of limited monitoring range, low flexibility, long time interval and poor monitoring accuracy. This article aims to establish a new distributed electrical method to monitor the leakage of hazardous liquids to improve the above situation. [Method] This article introduced the new method by starting from the basic principles of distributed electrical system, designation and implementation of the system's software and hardware, which contributed to the research, development and tests of the system. The new distributed electrical method adopted a data acquisition method, which had the features of one-time electrodes placement, full-channel and multi-electrode spacings. The leakage points could be detected quickly and accurately by analyzing the potential distribution collected by each electrode. [Result] Field test results show that the new distributed electrical method can detect the change of soil resistivity quickly and effectively, the test results are reliable, the resolution of collected data points is high, the data is intuitive, the position of abnormal body is obvious. The watered area and points can be effectively delineated. [Conclusion] The method can achieve dynamic monitoring of landfill liquid leakage through out multiple tests, which also provides an effective reference for detection, monitoring and environmental or geotechnical investigations.