西藏帕里河2004-06-22滑坡卫星监测

2004-06-22滑坡位于我国西藏自治区的最西端,中印边界附近的帕里河流域中部。以多时相高分辨率卫星图像为信息源,以Orbview立体像对制作的高精度DEM为地理控制,采用数字滑坡技术研究和监测该滑坡自滑坡前至2007年7月的活动。遥感解译表明,滑坡前该处为由弧形裂缝与山体分割的滑前危岩,2004-06-22发生的堵河事件为一高速顺层基岩滑坡,基于RS+GIS求得滑坡体积为63.7万m3。遥感监测显示自2004年9月至2007年7月共35个月内,滑坡边界及滑面各细部均没有明显变化,期间该处未见发生过任何新的滑坡活动。该滑坡是一次在新构造活动强烈的高山峡谷区自然形成的重力侵蚀活动过程,能量释放充分,近期除原滑体四周有一些泄荷及调整活动外不会有大的活动。

Satellite Monitoring for 2004-06-22 Landslide in the Pali River,Tibet

2004-06-22 Landslide is located at the middle part of the Pali River Basin which is in the western end of Tibet,China,and is near the China-India boundary.Taking multi-temporal high resolution satellite data as the RS information and DEM derived from Orbview as the geographical control,digital landslide technique has been adopted to study and monitor 2004-06-22 Landslide activities.Satellite image interpretation reveals that before landslide occurred the part of slope had already been the dangerous rocks before sliding,surrounding by fractures and nearly separating with slope,2004-06-22 Landslide is considered as a high-speed slide activity of bedrock bedding,which is calculated as 63.7×104 m3 in volume by the use of RS+GIS.Satellite monitoring shows that each part of the landslide has not changed during 35 months from Sep.,2004 to Jul.,2007,and there is no any new landslide activity occurring during this period.2004-06-22 Landslide is a natural gravity erosion process in the high mountain narrow canyon and intensive recent tectonic activity area,it has fully released energy,so apart from some unloading and adjusting activities surrounding the landslide,other landslides would not occur nowadays.