基于遥感影像的变化检测方法在滑坡体提取中的应用

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1、西南大学硕士学位论文摘要合滑坡体变化检测的自动阈值法。(3)与其他自然灾害如洪涝、干旱、雪灾相比，滑坡灾害的发生范围较小，故基于遥感数据的滑坡灾情评估有其独有的特点。本文中根据滑坡灾害在遥感影像上反映出来的特点，结合能获取的数据的实际情况，从基础设施损毁评估、农业损失评估、人口受灾评估三个方面，采用直接简便的空间模型对滑坡灾害灾情展开评估。关键词：滑坡体提取变化检测阈值选取多源遥感数据II两南大学硕十学位论文ABSTRACTApplicationofChangeDetectionBasedonRemoteSensingDat

2、aonExtractingtheS1ipMassMajor：cartographyandgeographicinformationsystemSupervisor：Prof．ZhouTing—gang，Prof．TangHongAuthor：ChenYingABSTRACTIntheWorldwide，especiallyinmountainousareas，thelandslidewhichisoneofthegeologicalhazardsthatisonlynexttotheearthquakecancausehea

3、vycasualtiesandeconomiclosses．Accordingtostatistics，duringthelast20yearsinthetwentiethcentury,thecountrieswhichareaffectedbythelandslidehazardmostseverely,suchasItaly,Japan，theUnitedStatesandRussia，reachedallaverageannualeconomiclossof15—20billionU．S．dollars．Chinai

4、salsoalandslide—pronecountries，onlyhave5·12earthquakeinWenchuantriggeringlandslideshadmorethan50thousandsites，includingforthetownsandvillagestheybroughtdirectandindirectthreatswhichalemorethan4000sites．Inadditiontocasualtiesandeconomic10sses，landslideoftenbringsahu

5、geecologicaldisaster．Giventhegrimsituationoflandslideandtheresultinghugelosses，theeffectiveinvestigationandmonitoringoflandslidedistributionandstatus，andpredictionandevaluationoftheslipmassCallprovideascientificbasisforthedisastermitigationandrelief．Inthispaper,”5·

6、12”WenchuanBeichuanearthquaketriggeringlandslideandthelandslideofWulongcausedbyimproperminingareusedasstudyobjects．TheCCDdatafromCBERS-02Bsatellitewith19．6mspatialresolution，Radarsat·1SAKimagesandtheHJ-1B／CCDimagearerespectivelyused．Twokindsofchangedetectionmethods

7、areusedtoextractthelandslide．Themaincontentsareasfollows：(1)Inthispaper,multi-sourceremotesensingdataareemployedtoinvestigateafastandeffectivewaytodetectlandslides，whichblocktherivers，andquicklylocatethosedisasters．Asaresult，thisdetectionisabletoprovidecriticalinfo

8、rmationtopeoplewhoinchargeofrescuingsufferersandmitigatingthedisasters．First，adoptingCCDdataacquiredfromCBERS-02Baspre．disasterimage，thisresearch