[1] PARIVA D, ASHI Q, RUCHI B. A review of the methods available for estimating soil moisture and its implications for water resource management [J]. Journal of Hydrology, 2012, 458: 110-117.
[2] WIGNERON J P, CALVET J C, PELLARIN T. Retrieving near-surface soil moisture from microwave radiometric observations: current status and future plans [J]. Remote Sensing of Environment, 2003, 85: 489-506.
[3] JACKSON T J, SCHMUGGE J, ENGMAN E T . Remote sensing applications to hydrology: Soil moisture [J]. Hydrol. Sci. J,1996, 41: 517−530.
[4] HUIIMAN J A , SPERL C, BOUTEN W，VERSTRATEN J M . Soil water content measurements at different scales accuracy of time domain reflectometry and ground-penetrating radar[J]. Journal of Hydrology, 2001, 245: 48-58.
[5] HUISMAN J A , SNEPVANGERS J J J C , BOUTEN W， HEUVELINK, G B M. Mapping spatial variation in surface soil water content comparison of ground-penetrating radar and time domain re?ectometry[J]. Journal of Hydrology, 2002, 269: 194-207.
[6] ALUMBAUGH D, CHANG PY. Estimating moisture contents in the vadose zone using cross-borehole ground penetratin Radar: A study of accuracy and repeatability[J]. Water Resources Research, 2002, 12: 45_1-45_2.
[7] GALAGEDARA L W, PARKIN G W, Redman J D. Field studies of the GPR ground wave method for estimating soil water content during irrigation and drainage[J]. Journal of Hydrology, 2005, 301: 182-197.
[8] LUNT I A, HUBBARD S S, RUBIN Y. Soil moisture content estimation using ground-penetrating radar reflection data[J]. Journal of Hydrology, 2005, 307: 254-269.
[9] APRIL Y，RICHARD G Z, EDWARD A M. Estimating water content in an active landfill with the aid of GPR[J]. Waste Management, 2013,33: 2015-2028.
[10] MINET J, WAHYUDI A, BOGAERT P. Mapping shallow soil moisture profiles at the field scale using full-waveform inversion of ground penetrating radar data[J], Geoderma, 2011, 161: 225-237
[11] BENEDETTO A . Water content evaluation in unsaturated soil using GPR signal analysis in the frequency domain[J]. Journal of Applied Geophysics, 2010, 71: 26-35.
[12] NICOLAESCU I, van GENDEREN P. Performances of a stepped-frequency continuous-wave ground penetrating Radar[J]. Journal of Applied Geophysics, 2012, 82:59-67.
[13] SCHMALZ B, LENNARTZ B, WACHSMUTH D. Analyses of soil water content variations and GPR attribute distributions [J]. Journal of Hydrology, 2002, 267:217-226.
[14] CHANZY A, TARUSSOV A, JUDGE A，BONN F. Soil water content determination using a digital ground-penetrating Radar[J]. Soil Sci. Soc. Am. J., 1996, 60: 1318-1326.
[15] Yee K S. Numerical solution of initial boundary walue problems involving Maxwell’s eqation in isotropic media [J]. IEEE Trans Antennas Propagat, 1966,14(3):302-307.
[16] TOPP G C, DAVIS J L, Annan A P. Electromagnetic determination of soil water content: Measurements in coaxial transmissions lines [J]. Water Resource Research, 1980, 16: 574-582.
[17] 朱安宁, 吉丽青, 张佳宝. 基于探地雷达的土壤水分测定方法研究进展[J]. 中国生态农业学报, 2009, 17(5): 1039-1044.
ZHU A N, JI L Q, ZHANG J B. Research progress on soil moisture measurement via ground-penetrating radar[J]. Chinese Journal of Eco-Agriculture, 2009, 17(5): 1039-1044.
[18] DEAN G. Ground-penetrating radar simulation in engineering and archaeology[J]. GEOPHYSICS, 1994, 2(59): 224-232.
[19] ROBINSON D A, JONES S B, Wraith J M. A review of advances in dielectric and electric conductivity measurements using time domain reflectometry[J]. Vadose Zone J., 2003, 2: 444-475
[20] 赵春江, 王成, 侯瑞峰. 土壤三参数测量方法 [J]， 2007，现代科学仪器， 5: 100-104.
ZHAO C J, WANG C, HOU R F. Preliminary study of the three soil parameters measurement methods[J]. Modern Scientific Instruments, 2007. 5:100-104.
