Research on spatial interpolation of earthquake disaster information based on geostatistics and DEM

Previous surveys and observations of destructive earthquake damage indicate that topography had a significant influence on earthquake disaster. After an earthquake, in order to provide the distribution of earthquake damage timely and accurately for earthquake relief headquarters, in reference to the concept of geostatistics, we performed spatial simulation for the disaster area using the earthquake disaster SMS provided by the quick reporters of disaster, and took essential geomorphologic factors (e.g., elevation, slope obtained from DEM) into Co-Kriging interpolation. This paper took the Wenchuan M_S8.0 earthquake for example, and used its disaster SMS data to do spatial interpolation by different ways. The results obtained by different ways of spatial interpolation and different semi-variogram models of geostatistics methods were compared, which indicates that with the help of suitable model and parameter, Co-Kriging interpolation with the consideration of slope can provide the best result of disaster simulation. This method provides a new and feasible idea for earthquake disaster simulation during the emergency.