The effects of trend and outliers on geostatistical analysis of hydraulic conductivity
The geostatistical characterization of hydraulic conductivity heterogeneity has been a hot research topic. In this study, the hydraulic conductivity measurements along two sections at the Borden aquifer are utilized for analysis. The effect of outliers on the normality of lnK is discussed using histograms and probability plots, and the trends of hydraulic conductivity are identified using multivariate or univariate regression analysis. After removing the trends from lnK, the normality of residual of lnK is discussed. Finally, vertical experimental variograms are calculated from lnK, residual of lnK, and residual of lnK without outliers. It is found out that the residuals after removing of trends are suitable for calculation of variograms, and removal of outlier could result in smoother experimental variograms.
X.W.Jiang L.Wan X.S.Wang
School of Water Resources and Environment, China University of Geosciences, Beijing 100083, P.R.China
国际会议
武汉
英文
23-26
2009-09-20（万方平台首次上网日期，不代表论文的发表时间）