Research on the Landfill Dipole Leakage Detection Technology and its Application in China

摘要

Landfill liner leakage detection has become the necessity procedure before the landfill put into operation. The dipole detection technology is studied and which can find the leaks of liner without any destruction of liner. This article discusses the key factors affecting the dipole sensitivity including the resistivity and thickness of the medium above the liner, and the distance between the dipole and the liner, the dipole spacing. The results indicate that higher resistivity of the medium, the thinner the liner is. Based on which the dipole method device is developed. Almost 68 landfill liner leakage detection surveys had been done recently in China using dipole technology. The results show that every landfill detected has leaks in liner, and the leaks detected per hectare is about 22 unit and 24 unit per landfill. Dipole technology has become the primary method in landfill liner leakage detection and play the critical role in landfill liner construction quality supervision.