Identification And Research Of Shuping Landslide Based On InSAR Technology

Three Gorges reservoir area geological conditions are complex,while the annual rainfall more than 1000 mm above,how heavy rain,heavy rain and other heavy rainfall process.The number of ancient landslides is large,and since 2003,the new landslide has been increasing since the Three Gorges Dam has become one of the most serious geological disasters in the Three Gorges reservoir area.Due to the suddenness and concealment of the Three Gorges reservoir area,it is difficult to find and monitor the conventional means.It brings great danger and hidden danger to the survival and life of the ecology and human beings.Because of its all-weather,all-weather,large-scale and non-cloud weather and other weather and climate,Radisson remote sensing technology has become more and more attention and applied as a new technology and new method of reservoir landslide monitoring.However,due to the relatively large terrain ups and downs in the Three Gorges reservoir area,the vegetation is numerous.In the practical data processing applications,the effects of time coherence,spatial coherence and atmospheric disturbances are obvious,and the deformation extraction of the landslide is greatly confused.In addition D-InSAR technology can only extract the upward distortion of the information,can not directly reflect the true three-dimensional deformation characteristics.In view of these problems,this article launched a series of analysis and discussion,the main research content and contributions include:(1)In this paper,the large-scale landslide in the Zigui area of the Three Gorges Reservoir area is detected and identified by stacking,and the slow deformation zone with annual mean deformation rate above 15 cm is obtained.Known landslides,one for the suspected landslide.(2)Using the SBAS technique to obtain the time-series deformation information of the shrub landslide from 2007 to 2011,the deformation characteristics of the left and right landslides in the shrub landslide are revealed,and the correlation analysis is made with the change of the water level of the reservoir.Reveal the mechanism of deformation provides a reference.(3)Using the pixel offset technique to obtain the two-dimensional deformation information of azimuth and distance.On the basis of this,the three-dimensional deformation information extraction based on equal precision,inequality and variance is estimated respectively.The results show that the 3D deformation information based on the variance component estimation can adjust the weight ratio of the data source well,and the fitting precision is improved greatly.(4)Considering the systematic error between different data sources,try to extract the three-dimensional deformation information of the system parameters,and the fitting precision has also been improved accordingly.