LandslidesdetectioninBatXatdistrict,LaoCaiprovince,VietnamusingtheAlosPalSARtime-seriesimagerybytheSBASmethod

  • Trần Vân Anh
  • Binh An Nguyen
  • Tien Dinh
  • Yen Hai Thi Nguyen
  • Nghi Thanh Le
Keywords: ALOS-PalSAR, InSAR Radar, Landslide, Multi-temporal Radar, SBAS.

Abstract

RadarInterferometry(InSAR)hasbeenknownasatechnologytomonitorthechangeofelementsontheearth'ssurfaceformanyyears.TherearemanyInSARmethods,inwhichthepermanentscatteringInSARRadar(PSInSAR)methodusesaseriesofimagestodeterminetheterraindeformetionsquitewell.However,forareaswithlotsofvegetation,thenumberofpermanentscatteringpoints(PSpoints)willbelimited.Inthispaper,wehavechosenamethodthatalsousesasetofmulti-temporalRadarimagesbuthasthelowestspatialandtemporalimagebaselines,thismethodiscalledtheSmallBaselinesmethod(SBAS).WiththeALOSPalSARimagesseriesthatwascollectedfromAugust2007toNovember2010,manylandslidepointsintheareaofBatXatdistrict,LaoCaiprovincewerediscovered.ThelandslidelocationsdetectedfromRadarimageswerecomparedwiththelandslidesurveyingpointsandlandslideinterpretedbyaerialphotosin2013providedbyVietnamInstituteofGeosciencesandMineralResourcesVietnam.Therehavebeenmanyslidingsitescoinsidingwiththesurveyedlandslides,whichprovesthatmanylandslidesexistanddevelopcontinuouslysuchasthelocationofMongSen

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Published
2021-03-09
Issue
Vol. 61 No. 4 (2020): Vol 61, Issue 4
Section
Bài viết