河北科技大学学报2017，Vol.38Issue(4)：389-394,6.DOI:10.7535/hbkd.2017yx04011
基于探地雷达的水库坝基渗漏正演模拟
Forward modeling of seepage of reservoir dam based on ground penetrating radar
摘要
Abstract
The risk of the reservoir dam seepage will bring the waste of water resources and the loss of life and property.The ground penetrating radar (GPR) is designed as a daily inspection system of dams to improve the existing technology which can't determine the actual situation of the dam seepage tunnel coordinates.The finite difference time domain (FDTD) is used to solve the Yee's grids discreatization in two-dimensional space, and its electromagnetic distribution equation is obtained as well.Based on the actual structure of reservoir dam foundation, the ideal model of air layer, concrete layer, clay layer and two water seepage holes is described in detail, and the concrete layer interference model with limestone interference point is established.The system architecture is implemented by using MATLAB, and the forward modeling is performed.The results indicate that ground penetrating radar can be used for deep target detection.Through comparing the detection spectrum of three kinds of frequency electromagnetic wave by changing the center frequency of the GPR electromagnetic wave of 50 MHz, 100 MHz and 200 MHz, it is concluded that the scanning result is more accurate at 100 MHz.At the same time, the simulation results of the interference model show that this method can be used for the detection of complex terrain.关键词
空间物理探测/探地雷达/水库大坝/Yee网格/正演模拟Key words
space physics detection/GPR/reservoir ram/Yee grid space/forward modeling分类
天文与地球科学引用本文复制引用
吴学礼,贾江波,孟凡华,李素康,张浩浩..基于探地雷达的水库坝基渗漏正演模拟[J].河北科技大学学报,2017,38(4):389-394,6.基金项目
石家庄市科技攻关项目(141131371A) （141131371A）
