探地雷达测量近地表含水量的研究  

Study on Near-Surface Water Content Measurement by Ground-Penetrating Radar

作　　者：董航[1,2] 刘四新[1] 王春晖[3] 曾昭发[1] 鹿琪[1] 王者江[1] 易兵[1] 

机构地区：[1]吉林大学地球探测科学与技术学院,长春130026 [2]中国科学院东北地理与农业生态研究所,长春130012 [3]中国地质调查局水文地质环境地质调查中心,河北保定071000

出　　处：《吉林大学学报（地球科学版）》2009年第1期163-167,共5页Journal of Jilin University：Earth Science Edition

基　　金：国家自然科学基金项目(40774055);国家“863”项目(2008AA06Z103)

摘　　要：为充分验证探地雷达方法用于测量近地表含水量的有效性和可靠程度,基于探地雷达的反射波法,根据介电常数、电磁波传播速度和含水量三者之间的关系,着重分析了探地雷达反射波法用于测量含水量的相关理论和特点,设计了适用于高频雷达信号的速度分析算法,建立了用于分析该问题的局部含水层模型。利用FDTD方法模拟分析了不同测量方式下,局部含水层的探地雷达响应,借助速度分析理论及Topp公式,反演得到了研究区域的含水量。For the sake of verifying adequately the feasibility of GPR method in the use of measuring near surface water content, based on GPR reflected wave method, according to the relations of dielectric constant, electromagnetic wave velocity and volumetric water content, the corresponding theory and characteristic of GPR reflected wave method was analyzed in detail. A velocity analysis algorithm that applied to high frequency radar signal was introduced, and a local aquifer model was established. The Finite- Difference Time- Domain （FDTD） method was used to model the GPR response of the local aquifer under different measurement acquisitions. On the combination of the velocity analysis theory and the Topp formula, the water content were obtained by inverse modeling.

关 键 词：探地雷达 局部含水层 速度分析 正演模拟 雷达 

分 类 号：P641.1[天文地球—地质矿产勘探]