Resistivity profiles of Perth soil in Australia in leak-detection test

Abstract

The use of a suitable leak-detection system for the prevention and mitigation of pollution due to lining system failures is integral to the proper management of landfill facilities. This paper briefly summarises various methods of leak detection that are currently being practised. The details of a newly developed leak-detection technique are also presented. The tests were conducted to evaluate the performance of the new technique by use of controlled leakage. The resulting resistivity profiles for Perth soil in Australia were obtained at 10 min. This method is found to be effective in detecting and locating liner leakage issues within 30 min from the instant when the defect develops. The electrical resistivity decreases with an increase in the leakage duration. The resistivity was found to increase with an increase in the distance/depth from the leak point. Installation of this innovative detection system below liners can enable the various waste containment facilities, such as landfills and leachate ponds, to monitor the lining systems and in case of failures, to take timely action for hazard mitigation. Results presented in this study can be useful for further development of sensors for leakage detection in lining systems. NotationA cross-sectional area of the specimen: m 2

Pumping Induced Hydraulic Gradient Driven Tracer Migration through Defects: Implications for Rapid Detection of Leakage in Vertical Flexible Barrier

“…Based on the conceptual model, the COMSOL multi-physical field is used as a simulation platform to simulate the water flow and tracer transport processes. Secondly, the Equivalent Hydraulic Conductivity (EHC) method is introduced to describe the influence of pumping wells and monitoring wells on the distribution of flow field and solute field in the process of small-scale seepage simulation [12]. The process of tracer migration induced by artificial hydraulics is simulated under the typical vertical seepage control curtain.…”