山西省土壤热扩散率和液态水通量密度研究

为研究山西省土壤热性质的时空分布，对各地区土壤热性质进行比较并讨论不同深度土壤层热性质的差异。利用山西省11个地市气象观测站2009年5—10月的浅层土壤温度资料，采用Gao方法研究山西省土壤热扩散率和液态水通量密度。结果表明：（1）山西省的土壤热扩散率k=0.01×10^-6~5.09×10^-6m2/s和液态水通量密度W=-13.28×10^-6~26.92×10^-6m/s。（2）山西省土壤热扩散率和液态水通量密度在垂直方向上不同性。（3）在0.025m层，大同市的k值和W值都是最小的，而晋城市的k值和W值都是最大的。液态水通量密度的最大值都出现在0.025m层。

Experiment of Soil Thermal Diffusivity and Liquid Water Flux Density in Shanxi Province

We compare the differences of soil thermal properties in 11 areas of Shanxi Province and discuss different soil thermal properties of different depths of soil layers, in order to research the spatial and temporal distribution of soil thermal properties of Shanxi Province. Using Gao method, based on the shallow soil temperature data of automatic observation stations in 11 areas of Shanxi Province from May to October in 2009, we obtained the results as: (1) the soil thermal diffusivity was k=0.01×10^-6-5.09×10^-6 m2/s, and liquid water flux density was W=-13.28×10^-6-26.92×10^-6 m/s; (2)soil thermal diffusivity and liquid water flux density of Shanxi Province were vertically heterogeneous; (3) in the 0.025 m depth of soil layer, the minimum value of the soil thermal diffusivity and liquid water flux density both appeared in Datong City, while the maximum values both appeared in Jincheng City. The maximum values of liquid water flux density appeared at the 0.025 m layer in all areas of Shanxi Province.