摘要
【目的】探明天然粉质黏土边坡含水率赋存特征。【方法】采用高密度电阻率法和时域反射技术,通过测量边坡土体含水率与电阻率,选取4种数学形式构建二者的关系模型,验证各模型在探究天然粉质黏土边坡水分运移规律中的有效性。【结果】边坡土体电阻率随含水率增加而降低;该边坡有效入渗或蒸发深度为2m,大于该深度范围,边坡土体含水率随深度增加逐渐减小。【结论】对数模型可有效描述粉质黏土边坡含水率变化情况。
【Objective】Water is a most active factor during deformation and instability disater of slope.We Aimied to get distribution of water content in natural slope of silty clay.【Method】High-density electrical resistivity tomography(ERT)method and time-domain reflectometry(TDR)were used together to measure water content and electrical resistivity of soil at typical location,then function between them is established in four mathematical form.【Result】Furthermore,distribution characteristics of underground water in slope were inverted basing on the above-mentioned function.Sequentially,the effectiveness of each model in exploring moisture distribution were verfied.Results show that:electrical resistivity of silty clay slope decrease with increasing water content.Moreover,the effective infiltration or evaporation depth of this slope were 2 m,and water content gradually decreases when depth were greater than 2 m.【Conclusion】Among these four mathematical formal models,the inverted distribution characteristics of water content in this slope basing on logarithmic formal model is closest to reality,which can effectively describe the change of water content in silty clay slope.
作者
张泰丽
闫永帅
伍剑波
孙强
朱延辉
ZHANGTaili;YANYongshuai;WU Jianbo;SUN Qiang;ZHUO Yanhui(Nanjing Center,China Geological Survey,Nanjing 210016,China;North China University of Water Resource and Electric Power,Zhengzhou 450045,China)
出处
《灌溉排水学报》
CSCD
北大核心
2020年第S01期126-129,共4页
Journal of Irrigation and Drainage
基金
中国地质调查局地调项目(DD20190648,DD20160282)
关键词
电阻率
含水率
高密度电阻率法
时域反射法
关系模型
electrical resistivity
water content
high-density electrical resistivity tomography method
time-domain reflectometry
model
作者简介
张泰丽(1980-),女。高级工程师,博士,主要从事研究方向为地质灾害调查评价,Email:zhangtaili@126.com;通信作者:闫永帅(1987-),男。助教,硕士,主要从事研究方向为地球物理与水文地质。Email:yanyongshuai@ncwu.edu.cn
