Abstract：This paper analyzes the soil moisture measure instrument measuring capabilities in the representative areas of Western Liaoning Province based on SFCW-TDR technology. The technology mainly uses the semiapplied & semi-theoretical formula. The soil volume moisture content can be calculated according to the accurate travel time t, measured by the high-frequency electromagnetic wave on the TDR probe inserted into the soil layer. The absolute error of the two measurements is less than 2% through comparison in different plots and continuous comparison at the same point for a period of time. It can be applied in practice to provide fast and accurate data support for local flood prevention and drought relief decision-making.
祖佳. 基于SFCW-TDR技术的测墒仪在辽宁省西部代表地块的应用分析[J]. 中国防汛抗旱, 2021, 31(8): 42-45.
ZU Jia. The application of soil moisture measure instrument based on SFCW-TDR technology in representative areas of Western Liaoning Province. journal1, 2021, 31(8): 42-45.
[1] Ferre P A, Rudolph D L, Kachanoski R G. Spatial averaging of water content by time domain reflectometry implications for twin rod probes with and without dielectric coatings[J].Water Resources, 1996, 32:271-279. [2] 赵燕东, 王一鸣. 基于驻波率原理的土壤含水率测量方法[J]. 农业机械学报, 2002, 33(4):109-111. [3] 杨卫中, 王一鸣, 李保国, 等. 基于相位检测原理的TDR土壤电导率测量研究[J]. 农业机械学报, 2010, 41(11):183-187. [4] Topp G C, Davis J L, Annan A P. Electron magnetic determination of soil water content:Measurements in coaxial transmissions lines[J].Water Resources, 1980, 16:574-582. [5] 陆明, 刘惠斌, 王晨光, 等. 新型TDR土壤水分测定仪SOILTOP-200的开发及应用[J]. 水利信息化, 2017, 137(2):31-37. [6] Roth C H, Malicki M A, Plagge R. Empirical evaluation of the relationship between soil dielectric water content as the basis for calibrating soil moisture measurements by TDR[J].Soil Science, 1992, 43:1-13. [7] 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 Journal, 2003, 2:444-475. [8] 任丽, 辛玉琛, 金颖. 插管式土壤墒情监测仪误差监测分析[J]. 中国防汛抗旱, 2018, 28(10):57-61. [9]宋炜, 张志秀, 钱昊, 等. 江苏省墒情自动监测系统的设计与应用[J]. 中国防汛抗旱, 2020, 30(3):27-31.
2021, Vol. 31 
