Investigation on Damming Object Induced by the Earthquake of Wenchuan on May 12 Based on Multi-platform Remote Sensing

The earthquake of Wenchuan on May 12 had led to large quantities of secondary mountain disasters such as rock fall,landslide,dammed lake as well as debris flow.The dammed lakes which were formed after the river channel had been dammed by large scale landslide were the most severe secondary disasters after the earthquake.Data of multi-platform remote sensing were acquired to obtain the information of the damming objects induced by the earthquake of Wenchuan while the quantity and distribution of the main damming objects in disaster area were investigated.At the same time,some information of the landslide mass which formed the damming objects was also obtained.The study shows that there were 37 damming objects in the main disaster area and the distribution of the damming objects was consistent with the distribution of the earthquake fault zone;73% of the damming objects had a moniliform distribution while 80% of the damming objects took place at the sharp turning areas of the river channel.