| Exploring soil layers and water tables with ground-penetrating radar |
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| 作者姓名： | K. ROTH U. WOLLSCHL&#;GER CHENG Zhu-Hu ZHANG Jia-Bao |
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| 作者单位： | [1]InstituteofEnvironmentalPhysics,UniversityofHeidelberg,Heidelberg（Germany） [2]InstituteofSoilScience,ChineseAcademyofSciences,Nanjing210008（China） |
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| 基金项目： | *1Project supported in part by the Deutsche Forschungsgemeinschaft (DFG), Germany (No.RO 1080/8-1) and jointly by Max-Planck Gesellschaft and the Chinese Academy of Sciences through a travel grant to the first author. |
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| 摘 要： | Ground-penetrating radar (GPR) has been used predominantly for environments with low electrical conductivity like freshwater aquifers, glaciers, or dry sandy soils. The objective of the present study was to explore its application for mapping in subsurface agricultural soils to a depth of several meters. For a loamy sand and a clayey site on the North China Plain, clay inclusions in the sand were detected; the thickness, inclination, and continuity of the confining clay and silt layers was assessed; and a local water table was mapped. Direct sampling (soil coring and profiling) in the top meter and independent measurement of the water table were utilized to confirm the findings. Also, effective estimates of the dielectric number for the site with the dielectric number of moist clayey soils depending strongly on frequency were obtained. Thus, important properties of soils, like the arrangement and type of layers and in particular their continuity and inclination, could be explored with moderate efforts for rather large areas to help find optimal locations for the time-consuming and expensive measurements which would be necessary to detail a model of the subsurface.
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| 关 键 词： | 地面搜索雷达 土壤层 地下水位 表面结构 地球物理探测 |
Exploring soil layers and water tables with ground-penetrating radar |
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| K. ROTH,U. WOLLSCHL&#;GER,CHENG Zhu-Hu,ZHANG Jia-Bao.Exploring soil layers and water tables with ground-penetrating radar[J].Pedosphere,2004,14(3):273-282. |
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| Authors: | K ROTH U WOLLSCHL&#;GER CHENG Zhu-Hua and ZHANG Jia-Bao |
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| Institution: | Institute of Environmental Physics, University of Heidelberg, Heidelberg (Germany). E-mail: kurtt.roth@iup.uni-heidelberg.de;Institute of Environmental Physics, University of Heidelberg, Heidelberg (Germany). E-mail: kurtt.roth@iup.uni-heidelberg.de;Institute of Environmental Physics, University of Heidelberg, Heidelberg (Germany). E-mail: kurtt.roth@iup.uni-heidelberg.de;Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China);Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China) |
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| Abstract: | Ground-penetrating radar (GPR) has been used predominantly for environments with low electrical conductivity like freshwater aquifers, glaciers, or dry sandy soils. The objective of the present study was to explore its application for mapping in subsurface agricultural soils to a depth of several meters. For a loamy sand and a clayey site on the North China Plain, clay inclusions in the sand were detected; the thickness, inclination, and continuity of the confining clay and silt layers was assessed; and a local water table was mapped. Direct sampling (soil coring and profiling) in the top meter and independent measurement of the water table were utilized to confirm the findings. Also, effective estimates of the dielectric number for the site with the dielectric number of moist clayey soils depending strongly on frequency were obtained. Thus, important properties of soils, like the arrangement and type of layers and in particular their continuity and inclination, could be explored with moderate efforts for rather large areas to help find optimal locations for the time-consuming and expensive measurements which would be necessary to detail a model of the subsurface. |
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| Keywords: | ground-penetrating radar soil layers water table |
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