Calibration on measurement of soil water content using SMS2 Soil Moisture Probe and HH2 Meter

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Publication date
1 January 2005
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Abstract

就HH2型土壤湿度计在黄土高原沟壑区黑垆土表层的应用进行了标定研究,分析了HH2测量的准确性,各容重标定曲线的精度和灵敏度。结果表明:在各种容重条件下用HH2测量土壤水分,输出电压的变异系数小于6%,仪器的准确性较高。线性标定方程斜率a随容重的增大而增加,常数b则相反。容重标定曲线对HH2的可调参数a0、a1影响较小。当土壤水分含量为18%～19%时,不同容重的标定曲线的差别最低

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    Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources

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