【摘要】 5.12汶川地震导致四川部分地区大规模泥石流爆发,其爆发规模和特征都不同于以往的泥石流,为了进一步研究震后泥石流的特征并揭示其现象,选取了位于绵远河流域的文家沟作为研究对象。主要利用ARCGIS平台对灾前灾后DEM数据进行对比,从主沟道的坡度及下切深度、沟谷形态的变化和区域侵蚀三个方面来分析文家沟泥石流的特征,解释了文家沟泥石流侵蚀过程和深切拉槽现象,为今后泥石流灾害评估、侵蚀过程分析及防治工程提供依据。更多还原

【Abstract】 The May 12th Wenchuan earthquake caused mass debris flows in Sichuan,the debris flows in size and feature are different from before.In order to analysis the characteristics of debris flows after the earthquake and explore the phenomenon,we take Wenjia Gully in the Mianyuan River Basin as the study subject.DEM data got before and after disaster are compared on the ARCGIS platform.In this paper,three aspects including the slope of the channel,the erosion depth,and the change of ideology and regional gully erosion are analyzed to find the erosion characteristics of Wenjia Dgully,and reveal the processes of erosion and deep groove phenomenon.It can provide some foundations for the hazards assessment and disaster control.更多还原