通过野外观测数据分析，研究湿润地区坡面尺度土壤含水率的时空变异性。利用频域反射( FDR)传感器在1年内以1次/h的观测密度连续监测近地表24个位置及2个剖面上12个位置的土壤含水率。利用变异系数和半方差图方法，分析了研究区域内不同空间位置上土壤含水率的时间变异性和不同季节土壤含水率的空间变异性。结果表明，在太湖流域地表附近土壤含水率呈中等或者中等偏弱变异性；土壤性质、地形、植被、气象和人类活动等因素影响了土壤水分的时空变异性；不同要素在时间变异性和空间变异性上影响力不同，并且不同季节有不同的主导影响因素；不同季节土壤含水率半方差具有相似的模式，这与各因素作用的强弱有关。%The temporal-spatial variability of soil moisture content on a hillslope in a humid area was analyzed based on field monitoring data. Hourly data over a year were collected with frequency domain reflectometry ( FDR) sensors. Twenty-four sensors near the soil surface and 12 sensors in two profiles were set up to monitor the soil moisture content continuously. The coefficient of variation and semi-variogram were used to analyze the soil moisture content’ s temporal variability in different locations and the spatial variability in different seasons in the study area. The results show that, in the Taihu Basin, the surface soil moisture content exhibited a medium or low level of variability. Soil characteristics, topography, vegetation, meteorological factors, and human activities influenced the temporal-spatial variability of soil moisture. These factors had different effects on the temporal-spatial variability, and the dominant factors were different in each of the four seasons. The semi-variograms for the soil moisture contents in different seasons had similar patterns due to different effects of the factors.
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