Application of time series InSAR in identifying potential landslide in Yangshuo County
The surface deformation of Yangshuo County is extracted by small baselines subset interferometry syn-thetic aperture radar(SBAS-InSAR)and persistent scatterer interferometry synthetic aperture radar(PS-InSAR)based on 30 Sentinel-1A views covering Yangshuo County from January 2018 to December 2019.The results show that the deformation rate monitored by SBAS is from-20.1 to 16.7 mm/a,and that monitored by PS is from-24.4 to 24.6 mm/a.The results obtained by the two methods are consistent.Landslide hazards are mainly distributed in highway side slope and rural mountains which are exploited by human beings.The subside is mostly affected by human activities such as production and construction.Because of the geological character-istics of complex structure in Guangxi,the influence of continuous rainfall may accelerate the subsidence.This case can provide effective data and technical support for disaster prevention and reduction in Yangshuo,and provide ideas and reference for landslide monitoring and analysis in hills and mountainous areas.It also proves that interferometric synthetic aperture radar,as a new radar measurement means,can accurately and efficiently identify landslide hazards in the area.
SBAS-InSARPS-InSARpotential landslidesurface deformationYangshuo County
国家科技期刊平台
NSTL
万方数据
