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Moisture content is a fundamental physical index that quantifies soil property and is closely associated with the hydrological,ecological and engineering behaviors of soil.To measure in-situ soil moisture contents,a distributed measurement system for in-situ soil moisture content(SM-DTS) is introduced.The system is based on carbon-fiber heated cable(CKHC) technology that has been developed to enhance the measuring accuracy of in-situ soil moisture content.Using CFHC technique,a temperature characteristic value(T_t) can be defined from temperature-time curves.A relationship among T_t,soil thermal impedance coefficient and soil moisture content is then established in laboratory.The feasibility of the SM-DTS technology to provide distributed measurements of in-situ soil moisture content is verified through field tests.The research reported herein indicates that the proposed SM-DTS is capable of measuring in-situ soil moisture content over long distances and large areas.
Moisture content is a fundamental physical index that quantifies soil property and is closely associated with the hydrological, ecological and engineering behaviors of soil. Measure in-situ soil moisture content, a distributed measurement system for in-situ soil moisture content (SM-DTS ) is introduced. The system is based on carbon-fiber heated cable (CKHC) technology that has been developed to enhance the measuring accuracy of in-situ soil moisture content. Using CFHC technique, a temperature characteristic value (T_t) can be defined from temperature-time curves. A relationship among T_t, soil thermal impedance coefficient and soil moisture content is then established in laboratory. The feasibility of the SM-DTS technology to provide distributed measurements of in-situ soil moisture content is verified through field tests. research reported that indicates that the proposed SM-DTS is capable of measuring in-situ soil moisture content over long distances and large areas.