Remote Sensing Technology for Early Recognition and Dynamic Monitoring of Geological Disasters:Take Changbo Township to Yangla Township Section as an Example
After the long-term development,the geological disaster monitoring and early warning methods of China have developed from the primitive manual inspection and single-point monitoring to the current high-precision area non-contact remote sensing monitoring,and have been widely used gradually.Firstly,the development process of original monitoring methods and remote sensing technology was summarized.The high-precision optical images combined with the ascending and descending orbits of Sentinel-lA radar images were used to interpret and catalog the hidden dangers of landslides between Changbo and Yangla town of the Jinsha River.The results show that there are 34 landslide hidden dangers in this area,22 of the landslide hidden dangers have the risk of blocking the river,and 4 of them directly cause losses to residents'lives and property.The deformation characteristics of the study area under the action of internal and external forces(earthquake and rainfall)were analyzed by using the time series curve,which verified the convenience and advanced nature of remote sensing in the identification of landslide hazards.Finally,in view of the development status and bottlenecks of remote sensing technology in China,a development framework for remote sensing identification of landslide disasters was proposed innovatively,which has long-term reference significance for the development of remote sensing technology in landslide identification.
landslidemonitoringoptical remote sensingInSARdevelopment direction
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