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以取自青岛市郊区的田间土样为研究对象,通过自制的室内土壤电阻率测量装置,测定了土壤的电阻率及对应的含水量,建立了电阻率-含水量关系模型。基于Ku/pF非饱和导水率测量系统测定的土壤水分特征曲线,借助含水量这一中间量,推求出了土壤电阻率-基质吸力关系模型,从而可以根据电阻率计算出对应的土壤基质吸力。耦合土壤电阻率-含水量关系模型与土壤电阻率-基质吸力关系模型,达到了预测土壤水分特征曲线的目的,为电阻率法在区域尺度空间和时间上预测土壤水分特征曲线提供了新的途径。
Taking soil samples taken from the suburbs of Qingdao City as the research object, the soil resistivity and the corresponding water content were measured by a homemade indoor soil resistivity measuring device, and the relationship model between the resistivity and the water content was established. Based on the soil moisture characteristic curve measured by the Ku / pF unsaturated hydraulic conductivity measurement system, the soil resistivity-matrix suction relationship model was derived by means of the mid-water content, so that the corresponding soil matrix can be calculated based on the resistivity suction. Coupling model of soil resistivity-water content and model of soil resistivity-matrix suction to achieve the purpose of predicting soil water characteristic curve provides a new way for the resistivity method to forecast soil water characteristic curve in space and time on the regional scale .