单衬层填埋场渗漏检测ELIM法的正演解析

建立了填埋场渗漏检测电势映像法(ELIM)模型.将单衬层填埋场看作水平方向为无穷大的3层均匀介质,上层为垃圾层,中间层为人工合成衬层,下层为土壤层.从稳定电流电场的本质出发,将漏洞电流等效为位于电流流入端的负电流源和位于电流流出端的正电流源.基于该模型对填埋场渗漏检测的电势映像法进行了正演解析,并根据模型的基本特征,对3层介质模型的解析结果进行了简化,结果表明该模型中电场在半无穷空间的电势分布与半空间模型中无穷媒质空间中的电势分布规律基本相同.

The Forward Modeling of ELIM Used in Single-Liner Landfill Leakage Detection

The electrical leak imaging method(ELIM) for landfill leakage detection is developed.For single-liner landfill,the waste material,the liner,and the soil under the liner are simulated by infinite horizontal layers.From an electrical standpoint,the leak current is regarded as two parts: one negative current resource at the entrance and one positive current resource with the same size at the exit.Base on such a configuration the forward modeling of ELIM used in single-liner landfill leakage detection was deduced.And the resolution result was predigested considering the characteristic of having a high-resistivity thin liner in the three-liner model,which shows that the distribution of electric potential in the infinite space of the three-liner model is consistent with that of the half-space model.