科研之友
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摘要
To reduce the possibility of probe deflections, conventional thermo-time domain reflectometry (T-TDR) sensors have relatively short probe lengths (<= 4 cm). However, short probes lead to large errors in TDR-estimated soil water content (theta(v)). In this study, two new 6-cm-long probe-spacing-correction T-TDR (CT-TDR) sensors were investigated. Compared with conventional 4-cm-long T-TDR sensors, the 6-cm-long CT-TDR sensors reduced errors in TDR-estimated theta(v). Errors in heat pulse (HP)-estimated theta(v) because of probe deflections were reduced when linear or nonlinear probe-spacing-correction algorithms were implemented. The 6-cm-long CT-TDR sensors provided more accurate theta(v) estimations than do the conventional 4-cm-long T-TDR sensors.
- 出版日期2018-11
- 单位中国农业大学
