【摘要】 为研究泥石流灾害对藏东南地区的影响和危害,利用RS和GIS技术对研究区泥石流物源进行遥感信息提取及特征分布分析,将所有物源分为八类,得出研究区泥石流物源分布不均匀,物源分布主要受地震、地质构造、气候条件、地层岩性、海拔高程、地形坡度等因素的综合影响,进而将该地区泥石流分为冰湖溃决型、冰雪消融型、冰雪消融和降雨混合型、降雨型、冰崩雪崩型泥石流五类,从中各选取一条典型泥石流沟,并从物源角度进行了阐述,得出除沟道堆积物外,分布在泥石流沟中上游的其他物源补给不同类型泥石流呈现一定差异。更多还原

【Abstract】 In order to research the impact and harm of debris flows in Tibetan southeast,the author made the remote sensing information extraction and characteristics of distribution analysis on the debris flow provenance in the study area using RS and GIS technology.All the material sources are divided into eight categories.It was concluded that uneven distribution of debris flow provenance happened in the study area.The results mainly affected by the combined effects of the source of seismic,geological structure,climate,lithology,elevation,slope of the terrain and other factors.The debris flow in this region can be divided into five categories:debris flow triggered by break of ice-lake,ice and snow melting type debris flow,melting snow and rain mixed mudslides,rainfall-type debris flow,and avalanche type debris flow.Selecting a representative from each of debris flow,it describes from the perspective of provenance.Except for the channel deposits,other supplies of provenance distributed in the middle-upper reaches of gully appear some differences in different types of debris flows.更多还原