Technical progress and development trend of geological hazards early identification with multi-source remote sensing
ZHANG Qin, Zhao Chaoying, CHEN Xuerong
Abstract
With the intensification of global climate change mineral resource exploitation and human engineering activities, the geological disasters including ice collapse, collapse, landslide, land subsidence and ground fissure are triggered with the trend of high frequency and in chain mode, which result in serious consequence. The early identification of geological disasters in large area and with high efficiency is the prerequisite for the hazard mitigation and prevention and the technical support of the engineering safety. In this paper, the characteristics of diverse geological disasters and traditional methods of their identification are introduced firstly. Then we focus on optical remote sensing, synthetic aperture radar, LiDAR and the fusion of multi-source remote sensing, where the technical flow and typical applications are given. Lastly, the current difficulties and the future trends are summarized and forwarded.