基于全极化探地雷达偏移算法的LNAPL污染土壤探测研究

摘要

本文将极化偏移算法应用于轻非水相液体(LN APL)污染土壤的探测研究.采用石英砂作为土壤,柴油作为LNAPL污染物,在实验室建立LNAPL污染土壤模型.利用全极化探地雷达系统对污染土壤进行探测.对预处理后的数据进行极化偏移成像后,LNAPL污染范围可以被清晰地识别.通过对包含极化特征的信息进行重构和成像,提高了探地雷达的探测能力.%In this paper,the polarimetric migration method is applied to image LNAPL contamination in soil.A model of LNAPL contaminated soil is set up by using quartz and diesel in the laboratory and the detection is conducted by a full polarimetric GPR system.A full polarimetric GPR system is used to detect LNAPL contaminated soils.The range of the LNAPL contamination can be imaged clearly after polarimetric migration is applied to the pre-processed data.By reconstructing and imaging the data containing the polarimetric information,the detection ability of GPR can be improved.