论文部分内容阅读
利用地统计学方法研究了我国西南丘陵区坡地土壤水分特性的时空变异特性。土壤水分含量在不同季节和不同层次具有一定的空间结构,可用纯块金效应模型、指数模型和球状模型进行拟合;土壤平均含水量、剖面各层含水量和半方差参数除变程外均随季节表现出明显的变化,但随土壤层次无明显的变化规律;土壤含水量的空间相关性随季节呈波动变化,块金值的变化趋势与基台值相似。克立格插值结果显示不同季节土壤平均含水量的空间分布格局不同。
The geostatistics method is used to study the spatio-temporal variation characteristics of soil moisture in sloping land in southwestern China. Soil moisture content in different seasons and different levels have a certain spatial structure, can be used pure gold effect model, the exponential model and the spherical model to fit; soil average water content, water content and semi-variance section of the profile except with the variable range are with the season But no obvious change with the soil layer. The spatial correlation of soil water content fluctuated with the seasons. The trend of nugget value was similar to that of abutment. Kriging interpolation results show that the spatial distribution pattern of average soil moisture in different seasons is different.