文献类型：期刊文章

作　　者：曾昭发[1] 陈雄[1] 李静[1,2] 陈玲娜[1] 鹿琪[1] 刘凤山[2]

机构地区：[1]吉林大学地球探测科学与技术学院,长春130026 [2]美国特拉华州立大学应用数学研究中心,多佛19901

出　　处：《Applied Geophysics》

基　　金：supported by the Doctoral Fund Project of the Ministry of Education(No.20130061110060 class tutors);the Post-Doctoral Fund Project(No.2015M571366);the National Natural Science Foundation of China(No.41174097);US DoD ARO Project"Advanced Mathematical Algorithm"(No.W911NF-11-2-0046)

年　　份：2015

卷　　号：12

期　　号：4

起止页码：615-625

语　　种：中文

收录情况：AJ、CSA、CSA-PROQEUST、CSCD、CSCD2015_2016、EBSCO、GEOREFPREVIEWDATABASE、IC、INSPEC、JST、PA、PROQUEST、SCIE、SCOPUS、WOS、普通刊

摘　　要：The travel time and amplitude of ground-penetrating radar （GPR） waves are closely related to medium parameters such as water content, porosity, and dielectric permittivity. However, conventional estimation methods, which are mostly based on wave velocity, are not suitable for real complex media because of limited resolution. Impedance inversion uses the reflection coefficient of radar waves to directly calculate GPR impedance and other parameters of subsurface media. We construct a 3D multiscale stochastic medium model and use the mixed Gaussian and exponential autocorrelation function to describe the distribution of parameters in real subsurface media. We introduce an elliptical Gaussian function to describe local random anomalies. The tapering function is also introduced to reduce calculation errors caused by the numerical simulation of discrete grids. We derive the impedance inversion workflow and test the calculation precision in complex media. Finally, we use impedance inversion to process GPR field data in a polluted site in Mongolia. The inversion results were constrained using borehole data and validated by resistivity data.

关 键 词：Ground-penetrating radar  impedance inversion  tapering function  stochasticmedium  

分 类 号：P631.3]