中文摘要：

针对鄂东南地区崩岗崩壁不同层次的土壤水分特征进行研究,旨在区分各层次土壤水分与崩岗侵蚀的联系。结果表明,崩壁不同层次的土壤性质存在差异,同时土壤水分特征曲线有一定的变化规律,表土层和红土层持水能力强于斑纹层和碎屑层,土壤水分特征曲线用Gardner模型拟合有较好效果。利用TDR对崩壁水分含量进行测定发现,表土层的含水量从上到下呈现逐渐增大的趋势,红土层至碎屑层含水量逐渐变小。崩壁纵剖面由里到外逐渐减小,且表层土壤水平方向上的土壤含水量变化量要大于剖面底层。

英文摘要：

This study investigated soil moisture characteristics of different layers of collapsing gully wall in southeast area of Hubei to distinguish variations in relationships between soil moisture characteristics of different layers of collapsing gully wall and soil erosion of collapsing gully.The results showed that soil properties of different layers of collapsed wall varied,and the change rules of soil water characteristic curve complied with some certain ways.The water-holding capacities of topsoil and red soil layer were stronger than those of the speckle layer and detritus layer,and soil water characteristic curve was successfully fitted by Gardner model.By using TDR to analyze the moisture content of collapsed wall,we found that water content gradually decreased from top to bottom of topsoil and from red soil layer to detritus layer,while gradually decreased from inside to outside of longitudinal profile of collapsed wall.In surface soil,the horizontal variations in soil moisture content were more significant than variations at the base of collapsed wall profile.