STABILITY ANALYSIS OF GLACIAL LAKE DEPOSITS IN PLATEAU AREA BASED ON SBAS-INSAR TECHNOLOGY
As an important part of terrestrial water bodies,glacial lakes can respond more sensitively to climate change,which will pose a serious threat to ecology and people's property safety after outburst.73 Sentinel-1 ascending orbit data covering the monitoring area in the past three years were obtained,and SBAS-InSAR(small baseline interferometry)was used to monitor the deformation of 13 large glacial lake deposits in the monitoring area.The results show that the deformation rate of most parts of the monitoring area is-10～20 mm/a,and the deformation rate of a few parts is large,and the monitoring area is in a stable state as a whole.There are a small number of deformation points greater than 30 mm/a around L9 and L10 in the glacial lake.Combined with the results of time series analysis of typical deformation points,the cumulative deformation of the accumulation body has converged in the past more than one year.Finally,the cumulative deformation is small and the stability is good.The remaining glacial lake deposits have small deformation and good stability.The research results can provide some reference for ecological environment protection and disaster prevention and mitigation in the region.
glacial lake depositSBAS-InSARdeformation monitoringstability
NETL
NSTL
万方数据
