【摘要】 根据区域水环境预测中土壤水盐监测与评价的要求,进行了土壤水盐空间变异性与稳健变异函数的研究。利用河套灌区内典型试验区返盐严重的春季水盐采样数据,计算了传统地质统计学变异函数,发现数据统计分析和特征受特异值影响较严重,运用稳健统计理论与方法进行了剔除特异值后计算稳健变异函数及其相应的调控技术的尝试,获得了较好效果。重点探讨了影响系数法中参数K的确定原则和相应技术,并与估计邻域法做了对比分析。结果表明:稳健地质统计学处理特异值的方法可以移植到农田水利与水土科学中应用。更多还原

【Abstract】 On the basis of requirements on water-salt monitoring and evaluation in zone water environment forecasting, this paper studied the time-space variability of the soil water-salt and the Robust Variogram. Utilizing water-salt spring sampling data from typical experiment sections which have severe returning salt in Hetao irrigation zone, calculated traditional Geostatistics Variogram, found that the statistic distribution and character of data are seriously influenced by oulier, using Robust Statistics theory and method, stabed calculating the Robust Variogram after eliminating the outliers and testing correspond adjusting or controlling technic, got better results. Especially Discussed ascertaining principles of K value and correspond technic in the Influencing Coefficient Method, contrasting with the Estimating Neighborhood Method. Results showed that the outlier handling method based on Robust Geology Statistics can be introduced into the Irrigation and Water Conservancy and the Water-soil science.更多还原