易贡巨型高速滑坡卫星遥感动态监测

Using satellite remotely sensed data to monitor Yigong remendous high-speed landslide

多期卫星遥感数据与图像清晰地反映了易贡滑坡的演变及其地貌形态特征。通过专题对比解译及滑坡时程分析，重点监测和评价了滑坡堰塞湖溃决后汹涌洪水对下游两岸产生的重大生态破坏。结果显示，下游又新增了２５个不同规模的浅层滑坡或滑落，新河床两测新增的大面积滩地覆盖了两侧的森林、草地；个别河段出现了移位改道。

The evolution and Geomorphologic morphological characteristics of Yigong Landslide were clearly identified through multi-temporal satellite remote sensed data and images. By means of thematic comparative interpretation and sequence analysis of landslide, monitoring and evaluation were focused on serious ecological damage caused by the burst of the barrier lake. The results show that another twenty-five shallow landslides with various scales took place at downstream. The forest and grassland were overlaid by newly large area river beach along the new riverbed. Several sections of river course were displaced and changed.