GPR测量滨海盐渍土剖面分层的实验研究  

Experimental Study on GPR Measurement of Coastal Saline Soil Profile

作　　者：王萍[1,2] 李新举[1] 闵祥宇[1] 杨东[1] 王新[1] 李俊颖[1] 孙小银[2] WANG Ping LI Xinju MIN Xiangyu YANG Dong WANG Xin LI Junying SUN Xiaoyin(Postdoctoral Research Station of Agricultural Resources and Environment, Shandong Agricultural University, Tai＇ an, Shandong 273100, China School of Geography and Tourism, Qufu Normal University, Rizhao, Shandong 276826, China)

机构地区：[1]山东农业大学农业资源利用博士后流动站,山东泰安273100 [2]曲阜师范大学地理与旅游学院,山东日照276826

出　　处：《土壤》2016年第6期1261-1269,共9页Soils

基　　金：山东省自然科学基金项目(ZR2015PD001)资助

摘　　要：土壤剖面分层是GPR调查研究工作的主要内容,也是时域信息提取和定量反演的基础。使用250 MHz的pulse EKKO PRO探地雷达,探测不同植被覆盖或同一植被长势差异的地块,开挖剖面实测对比GPR的分层结果,剖析电磁波信号对土壤水分、盐分、粒径组成3个因子的响应特征。结果表明,从GPR波谱特征中可以区分表层盐渍化程度不同的地块,误差多小于0.5 m;综合波谱影像和振幅变化数据,能够辨晰0~1 m的土层信息,分层误差可达0.1 m;土壤盐分对电磁波信号的影响特征在该地区表现得十分显著。The identification of soil profile layers is the main research content of GPR investigation and also the basis job of time-domain signals extraction and quantitative inversion. In this study, pulseEKKO PRO GPR of 250 MHz central frequency was used to detect the soil profile layers of plots covered by different vegetation coverages or plots covered by same vegetation but with different growing conditions, and the results were compared the soil profile layers obtained by the method of digging profiles, and the response characteristics of electromagnetic wave signals to soil water, salinity and grain size composition were also analysed. The results showed that： 1） By observing GPR spectral images, soil profile variation with different vegetation coverages and growing conditions can be distinguished with errors mostly are less than 0.5 m. 2） Soil layer information in the depth of 0-1 m can be clearly distinguished with comprehensive analyses of soil profile spectral images and amplitude-time data with 0.1 m discriminating error of soil layering. 3） The effects of soil salinity on electromagnetic wave signals are very significant in this region.

关 键 词：GPR 土壤剖面 滨海盐渍土 土壤盐分 

分 类 号：S152[农业科学—土壤学] S159[农业科学—农业基础科学]