Deformation Monitoring of Landslide in Deqin County,Yunnan Province Based on PS/DSInSAR Technique
Landslide is one of the most serious geological disasters in China.In response to the problems the conventional MTInSAR technique faces in monitoring landslide deformation,such as insufficient monitoring point density,limited monitoring accuracy,and difficulty in landslide interpretation,a PS/DSInSAR technique that effectively integrates PS and DS points is proposed.Firstly,the proposed technique carries out HTCI homogeneous pixel recognition and phase optimization processing with coherence n-power weighting and obtains DS candidate points.Then,it fuses them with PS points obtained from amplitude deviation and screens high-quality monitoring points.Finally,the landslide deformation information is extracted through phase interpretation of monitoring points.Taking Deqin county,Yunnan province,as the study area,relevant landslide monitoring and analysis are conducted.The experimental results show that the density of monitoring points obtained by the PS/DSInSAR technique increases by about 14 times compared to the conventional StaMPS-SBAS technique,which can more accurately identify landslide boundaries and conduct temporal evolution analysis.And analysis shows a significant correlation between landslides and seasonal rainfall in the study area.
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