文章基本信息

标题：A new empirical model for estimating the hydraulic conductivity of low permeability media
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作者：Qi, S. ; Wen, Z. ; Lu, C. 等
期刊名称：Proceedings of the International Association of Hydrological Sciences
印刷版ISSN：2199-8981
电子版ISSN：2199-899X
出版年度：2015
卷号：368
页码：478-483
DOI：10.5194/piahs-368-478-2015
摘要：Hydraulic conductivity ( K ) is one of the significant soil characteristics in terms of flow movement and solute transport. It has been recognized that K is statistically related to the grain-size distribution. Numerous models have been developed to reveal the relationship between K and the grain-size distribution of soil, but most of these are inappropriate for fine-grained media. Therefore, a new empirical model for estimating K of low permeability media was proposed in this study. In total, the values of K of 30 soil samples collected in the Jiangning District of Nanjing were measured using the single-ring infiltrometer method. The new model was developed using the percentages of sand, silt and clay-sized particles, and the first and the second rank moment of the grain-size through the moment method as predictor variables. Multivariate nonlinear regression analysis yielded a coefficient of determination ( R 2 ) of 0.75, indicating that this empirical model seems to provide a new approach for the indirect determination of hydraulic conductivity of low permeability media.
关键词：hydraulic conductivity; empirical model; grain; size analysis; fine medium