Leak current model in leakage detection of HDPE liner using high voltage DC method
人工合成衬层渗漏检测高压直流电法漏洞电流模型

A new leak current model of high voltage DC leak detection is developed. For single-liner landfill, the waste material layer, the geomembrane liner, and the soil under the liner are simulated by infinite horizontal layers. And the leak current is regarded as two parts, which one is negative current resource at the entrance, and the other one is positive current resource with the same size at the exit. To identify the validity of the model and locate the leaks in the geomembrane liner, pole-dipole experiments above the liner and fixed electrodes experiments under the liner were carried out at a medium scale geomembrane lined facility. The agreement is satisfactory between the experimental data and the calculated model value, which validates that it is helpful to predict leaks in geomembrane liner with the model.