基于Sentinel-1数据监测临汾盆地地表形变

基于Sentinel-1数据监测临汾盆地地表形变Title:MonitoringSurfaceDeformationintheLinfenBasinUsingSentinel-1DataAbstract:TheLinfenBasin,locatedinnorthernChina,isknownforitssusceptibilitytogeologicalhazardssuchasgrounddeformation.Inthisstudy,weinvestigatedthepotentialofusingSentinel-1satellitedatatomonitorandanalyzesurfacedeformationintheLinfenBasin.ThedatafromSentinel-1providespreciseandfrequentradarmeasurements,makingitanidealtoolformonitoringearthsurfacechanges.Inthispaper,wepresentanoverviewoftheLinfenBasin,discussthemethodologyusedforsurfacedeformationanalysisusingSentinel-1data,andpresenttheresultsofourstudy.1.Introduction1.1BackgroundTheLinfenBasinischaracterizedbyitssignificantgrounddeformation,whichcanbeattributedtovariousfactorssuchastectonicactivity,miningoperations,andgroundwaterextraction.Thesedeformationphenomenaposeathreattothelocalpopulationandinfrastructure,makingcontinuousmonitoringessentialforhazardmitigation.1.2ObjectivesThemainobjectiveofthisstudyistoassessthesuitabilityofSentinel-1satellitedataformonitoringsurfacedeformationintheLinfenBasin.Byanalyzingthedatacollectedoveraspecifictimeperiod,weaimtounderstandthespatialandtemporalcharacteristicsofgrounddeformationandidentifypotentialareaspronetofuturehazards.2.Methodology2.1DataAcquisitionWeacquiredSyntheticApertureRadar(SAR)datafromtheSentinel-1mission,whichoffershigh-resolutionimagesandarepeatobservationcycleofapproximatelysixtotwelvedays.Thisfrequentdataacquisitionallowsforthedetectionofsmall-scalegroundmovements.2.2InterferometricSAR(InSAR)AnalysisWeemployedtheInSARtechniquetoanalyzetheacquiredSentinel-1data.InSARutilizesthephasedifferencebetweentwoSARimagestakenfromdifferentdatestocalculatesurfacedisplacements.Thistechniqueprovidesaccuratemeasurementsofgrounddeformation.3.Results3.1DataProcessingTheacquiredSentinel-1datawerepreprocessedtocorrectforartifactsandatmosphericeffects.Thisstepensuredtheaccuracyandreliabilityofthesubsequentanalysis.3.2SurfaceDeformationAnalysisThroughInSARanalysis,wederivedaseriesofinterferogramsrepresentingthephasedifferencesbetweentheacquiredSARimages.Byunwrappingtheseinterferograms,weobtainedquantitativemeasurementsofsurfacedeformationovertime.TheresultsrevealedsignificantgroundsubsidenceandupliftinvariousregionsoftheLinfenBasin.3.3SpatialandTemporalPatternsThespatialanalysisoftheobtaineddeformationmapsallowedustoidentifyregionsofhigherdeformationactivity.Weobservedconcentratedareasofgroundsubsidencenearcoalminesandgroundwaterextractionsites.Thetemporalanalysisrevealedbothcontinuousandepisodicdeformationindifferentpartsofthebasin.Thesefindingsarecrucialforunderstandingtheunderlyingcausesofsurfacedeformation.4.Discussion4.1ComparisonwithGroundTruthDataTovalidatetheaccuracyoftheSentinel-1data,wecomparedtheInSAR-deriveddeformationmeasurementswithgroundtruthdataobtainedfromGPSmeasurementsandlevelingsurveys.Theresultsshowcasedahighcorrelationbetweenthetwodatasets,indicatingthereliabilityofthesatellite-basedmeasurements.4.2InterpretationofDeformationPatternsTheobserveddeformationpatternscanbeattributedtofactorssuchasgroundwaterextraction,tectonicactivities,andminingoperations.Integratinggeologicalandhydrologicaldatawiththesurfacedeformationmapswillfacilitateacomprehensiveunderstandingofthecausativefactorsandtheirspatialdistribution.5.ConclusionInthisstudy,wedemonstratedthepotentialofusingSentinel-1datatomonitorandanalyzesurfacedeformationintheLinfenBasin.Theresultshighlightedthesignificantgroundsubsidenceandupliftinvariousregions,indicatingtheneedforcontinuousmonitoringandbetterlandmanagementpractices.Thefindingsofthisstudycontributetotheunderstanding