IMPACT OF DIPOLE SPACING IN ELECTRICAL LANDFILL LEAKAGE DETECTION
GUAN Shao-peng1, WANG Yu-ling2, NAI Chang-xin2, SUN Wen-yan1
1. School of Communication Engineering, Shandong Institute of Business and Technology, Yantai 264005, China;
2. Research Institute of Solid Waste Management, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
Abstract:The dipole spacing could affect the detection sensitivity and accuracy in the electrical landfill leakage detection. Based on the principle of electrical method, the influence of dipole spacing was analyzed and validated by experiment. The theoretical and experimental results show that: (1) the greater the dipole spacing is, the higher the detection sensitivity is, but the locating accuracy lower and some leaks will easily be undetected; (2) the smaller the dipole spacing is, the higher the leak locating accuracy is, but the detection sensitivity lower. In engineering practice, the dipole spacing usually is determined as 1 m.
[1] Darilek G T, Laine D L.Costs and benefits of geomembrane liner installation CQA //Geosynthetics 2001 Conference Proceedings.Portland, Oregon: 2001:65~75.[2] Darilek G T,Laine D L.Performance-Based specification of electrical leak location surveys for geomembrane liners//Industrial Fabrics Assoc. Int., Geosynthetics'99 conference Proceedings.Minn: Saint Paul,1999:569-573.[3] 杨萍,能昌信,董路,等.人工合成衬成渗漏检测高压直流电法漏洞电流模型[J].环境科学学报,2005,25(10).[4] 杨萍,董路,王琪.单合成衬层填埋场渗漏检测的多介质模型[J].中国环境科学,2008,28(01).[5] Parra J O,Owen T E.Model studies of electrical leak detection in geomembrane lined impoundments[J].Geophysics,1988,53 (11).