泥炭地介电特性及分层结构的雷达探测机理研究

项目名称： 泥炭地介电特性及分层结构的雷达探测机理研究

项目编号： No.41271351

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 天文学、地球科学

项目作者： 董航

作者单位： 中国科学院东北地理与农业生态研究所

项目金额： 75万元

中文摘要： 项目以矢量网络分析仪为基础组建步进频率体制的雷达实验探测系统，开展浅层泥炭地三维构造的雷达探测实验研究；利用电磁波信号在有耗分层媒质中的传输理论及时域有限差分（FDTD）法，对泥炭地分层土壤进行雷达仿真研究，并根据探测需要给出雷达优化探测参数；利用共中心点法测量典型泥炭土壤中各层的电磁波速度，形成速度谱，研究分层速度与土壤层介电常数及含水量的关系；结合雷达探测的泥炭地构造，研究介电常数与泥炭地立体分层结构的联系，建立评估泥炭储量的方法；根据建立的介电常数与含水量的关系，形成泥炭地各层含水量分布结构；评估和检验使用雷达探测结果分析地下泥炭结构和含水量方法的效果；项目所获得的成果可为我国开展大范围航空机载泥炭资源探测提供机理和技术支持。

中文关键词： 泥炭地；分层结构；雷达；探测机理；介电常数

英文摘要： In this project, a GPR experimental system will be constructed using relevant devices and employing SFCW mechanism based on VNA (Vector Network Analyzer). And 3D radar detecting experiment in shallow peatland will be carryied out. Radar simulation research on the layered soil of peatland will be conducted by employing transmission theory in lossy layered-medium and finite-difference time-domain (FDTD) method. The optimization of radar detection parameter will be provided according to the detection requirements. The velocities of electromagnetic wave in different layers of typical peat soil will be measured using the CMP method, and velocity spectrum will be constructed. The relation between stratified velocity and dielectric constant and water content will be studied. And the relation between dielectric constant and 3D peatland layered structure will also be studied in order to establish a method for evaluating the reserves of peat. Based on the relation between dielectric constant and water content, the water content distribution structure for different layers of peatland will be constructed. The effect for the analysis of underground peatland structure and water content by using radar detecting results will be evaluated and tested. The product achieved from this project will provide support in terms of me

英文关键词： Peatland；Layered structure；Radar；Detecting mechanism；Dielectric characteristic