摘要
本文介绍本院野外试验场包气带土壤结构和渗透性参数实验分析的主要方法及其结果。实验结果表明 ,所研究剖面的土壤不均匀程度较高 ,平均不均匀系数为 14.7;饱水渗透系数在垂直与水平两主轴方向离心率在 0 .6 5～ 1.0 0之间 ,剖面各层平均离心率为 0 .93,故从地下水动力学角度看 ,该包气带土壤可认为是各向同性介质 ;而不同土壤层渗透系数之间有明显差异 ,故整个包气带为非均质。饱水渗透系数在剖面的上、下段大 。
Measurement of soil grain and pore size distribution,observation of soil microstructure and permeability test are used to study soil structure and permeability.The results show that soil heterogeneity in vertical soil profile is much great.The mean heterogeneity coefficient is 14.7 .The eccentric rate of saturated permeability coefficient in vertical and horizontal direction is from 0.65 to 1.00.The mean coefficient is 0.93.So the soil can be considered to be isotropic from the view point of the groundwater dynamics.The permeability coefficient has more difference in different soil layers.In vertical profile,the saturated permeability coefficient is relatively great in upper and under layers.It is relatively small in middle layers. (
出处
《辐射防护》
CAS
CSCD
北大核心
2000年第1期119-122,共4页
Radiation Protection
