Multi-phase DSM For The Dynamic Monitoring Of Geological Hazard And Environment

Outline of earth science can be divided into outer spheres and internal spheres, the outer spheres are further divided into hydrosphere, atmosphere and lithosphere;such problems as environmental pollution are mainly manifested in these spheres. With the frequent geological disasters and environment deteriorating, how to coordinate development between resources and environment protection and economic growth has become one of the present problems that urgent to be solved. Geological disaster is to point to in under the action of natural or man-made factors, damage to the environment, human life and property and loss of geological phenomena, such as collapse, landslide, debris flow, etc. Our country is one of the most serious geological disaster hazards and disasters not only high frequency and widely distributed. Geological disasters not only seriously endanger people’s life safety, at the same time for buildings, and some public facilities cause serious damage, cause serious economic losses, affecting our country economy and sustainable development.The study area is located in miyun county in the northern beijing, which owns rich mineral resource and geological disasters are frequent。 This area is based on multiphase DEM data of environmental monitoring and protection of the lithosphere ideal location.Paper’s main research results for the following points:1) Summarized the DEM data acquisition methods base on air space ground integrated such as stereopair for DEM generation, Li DAR, UAV, digital close range photogrammetry, Mainly introduced the principle and technical method of DEM data automatic extraction based on the Li DAR and stereo pairs.2) Introduced and summarized the methods of geological hazard and environment dynamic monitoring based on DEM, geological hazards and environmental automatic extraction and interpretation base on the hillshade, slope, maximum curvature and minimum curvature of single DEM. The location and characterization of geological disasters and environment have been achieved. Difference analysis and earthwork quantity calculation based on the multiperiod DEMs can realized the geological hazards and environmental qualitative and quantitative.3) Take county Miyun as the study area, detailed introduced the technological process of DEM extraction from CARTOSAT-1 and the ground-based laser scanning radar point cloud processing and DEM acquisition of Shouyun iron mine. According to the two scale data made different scales data analysis of the geological hazards and environmental dynamic monitoring research. In mid-scale geological hazard and environmental monitoring based on the CARTOSAT-1 DEMs, obtained the changes of Shouyun and Weike iron mine from 2009 to 2012 and extracted several geological disasters and potential disasters by using the geological elements such as slope and maximum curvature. The position of the mine disaster has been extracted in large scale typical area geological disaster and environmental monitoring research based on Li DAR DEM. The results of demonstration research shows that the extraction of geological factors and differential analysis by using multiphase DEMs can qualitative and quantitative analysis and do research on geological disaster and the environment, so as to dynamic monitor the geological hazards and environment by using 4D technology based on the timeline.