非饱和土壤水流运动特征的显色示踪  

Characterizing unsaturated soil water flow with iodine-starch staining method

作　　者：高云鹏[1] 盛丰[1] 唐泽华[1] 谢平英[1] 

机构地区：[1]长沙理工大学水利工程学院,湖南长沙410004

出　　处：《长沙理工大学学报（自然科学版）》2013年第4期74-79,85,共7页Journal of Changsha University of Science and Technology:Natural Science

基　　金：国家自然科学基金资助项目(51109017);湖南省自然科学基金资助项目(13JJ3069)

摘　　要：为了研究非饱和土壤水流的运动特征,在原状土条件下运用碘-淀粉显色示踪方法,开展了6组入渗试验.通过对试验区域土壤水入渗分布的统计分析和土壤水深层渗漏量的计算,研究了土壤水流的非均匀流动与入渗水量和试验尺度之间的关系.研究结果表明,土壤水流运动表现出明显的非均匀特征;土壤水流运动的非均匀程度随着入渗水量的增大而表现出减小的趋势;土壤水流运动的非均匀程度随着试验尺度的增大而表现出增大的趋势;土壤水的深层渗漏率随着入渗水量和试验尺度的增大而呈非直线性增大.In order to study characteristics of unsaturated soil water flow,six sets of infiltration test were carried out by the iodine-starch staining method in undisturbed soil condition.The heterogeneous infiltration characteristics related to the infiltration water depth and test scale were analyzed using statistical method based on the experiment data.The results show infiltration distributions within and among the soil profiles exhibit distinct heterogeneities.The soil water flow heterogeneity decreased with the increase of applied water.The soil water flow heterogeneity increased with the increase of test scale.The deep seepage increased with the increase of applied water and test scale.

关 键 词：碘-淀粉显色示踪方法 入渗 试验尺度 非均匀水流 深层渗漏率 

分 类 号：P641.2[天文地球—地质矿产勘探]