Abstract:

On June 28, 2010, a largescale landslide occurred in the county of Guanling, Guizhou Province. On June 30, China Aero Geophysical Survey & Remote Sensing Center for Land and Resources (AGRS) carried out the urgent remote sensing flight disposed by China Geological Survey Administration, and highresolution aerial image data of three days after landslide was captured. Then, orthorectification was completed for disaster interpretation and analysis. QuickBird data, aerial photo, 1∶50 000 digital topographic data and DEM were taken as preand post628 landslide remote sensing data and geographical control data respectively. Disaster loss assessment and landslide morphological structure and movement properties were interpreted by using digital landslide technology. Landslide volume was estimated by using the DEM calculation of preand postlandslide. Based on the analysis of formation factors of 6.28 landslide and hidden geohazard interpretation, suggestions are proposed for disaster prevention and mitigation.

Key words: 6.28 landslide of Guanling, aerial photograph, digital elevation model, landslide morphology and structure, hidden geohazards