关键词: 汶川地震, 同震地表变形, 光学遥感, 影像识别, 阴影

Abstract: Data from remote sensing played important roles in the rescue during the 2008 Wenchuan earthquake and reconstruction after the great disaster.It also has much realistic significance to implement a rapid interpretation and geological study from those data.Analysis was made on the characteristics of optical remote sensing image,such as shadows and texture,and geological and geomorphological features of the surface rupture from field investigation.The interpretation marks of the post-earthquake optical remote sensing image were concluded for the fault scarp of the great Wenchuan earthquake.Based on the optical imaging,the shadow forming and interpretation characteristics of different kinds of fault scarp were analyzed for the Wenchuan earthquake.The imaging time and the occurrence of fault scarps make a constraint on the forming of shadows and its interpretation for fault scarps.Analysis based on characteristics of imaging and rupture styles gives a new insight on the limitation in the application of remote sensing data of co-seismic surface deformation,and also a certain proposal for the emergency aerial remote sensing in the future.

Key words: Wenchuan earthquake, co-seismic surface deformation, optical remote sensing, image interpretation, shadow