Real-time geological disaster monitoring with deformation parametersauto-detection technique

摘要

CORS/GMS integration can be used to monitor displacement of surface deformation in geological disasters at the mm accuracy level. In order to detect the distinct geological disaster-related displacement deformation automatically and extract the temporal and spatial characteristics in the process of deformation, an algorithm DDExM (Deformation Detection & Exaction Method) for deformation parameter estimation is presented in this paper. The algorithm DDExM includes four steps: outlier detection, adaptive threshold classification, deformation evaluation, and deformation parameters auto-detection. The hypothesis and test, and threshold classification tools are used, based on Kalman filter, to realize the auto-detection of uniform deformation parameters applicable to multi-scale accuracy demand from decimeter to millimeter level. Experimental data from both the slope at Tiansan stone pit and the Guangdong Continuously Operating Reference Stations (GDCORS) based geological disaster dynamic monitoring are used to evaluate the performance of the DDExM. The DDExM leads to the application of CORS/GMS integration based geological disasters dynamic monitoring in provincial region automatically and continually with high temporal and spatial resolution.