期刊
GROUND WATER
卷 50, 期 3, 页码 340-347出版社
WILEY-BLACKWELL
DOI: 10.1111/j.1745-6584.2012.00928.x
关键词
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资金
- National Science Foundation [CBET-0954499]
- Arthur H. Frazier Fellowship
- Nature Conservancy
- Wisconsin Department of Natural Resources
- Directorate For Engineering
- Div Of Chem, Bioeng, Env, & Transp Sys [0954499] Funding Source: National Science Foundation
- Division Of Earth Sciences
- Directorate For Geosciences [1129003, 1128999] Funding Source: National Science Foundation
Characterizing both spatial and temporal soil moisture (?) dynamics at site scales is difficult with existing technologies. To address this shortcoming, we developed a distributed soil moisture sensing system that employs a distributed temperature sensing system to monitor thermal response at 2 m intervals along the length of a buried cable which is subjected to heat pulses. The cable temperature response to heating, which is strongly dependent on soil moisture, was empirically related to colocated, dielectric-based ? measurements at three locations. Spatially distributed, and temporally continuous estimates of ? were obtained in dry conditions (?= 0.31) using this technology (root mean square error [RMSE] = 0.016), but insensitivity of the instrument response curve adversely affected accuracy under wet conditions (RMSE = 0.050).
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