27540.基于遙感的植被覆蓋度估算及其動態(tài)研究——以鄱陽湖區(qū)為例

1、分類號UDC密級編號盤!!塵塹學位論文基于遙感的植被覆蓋度估算及其動態(tài)研究——以鄱陽湖區(qū)為例曼里衛(wèi)塑￥Q叢!Eg星王叢lQ盟￡QYE叢堡墾△盟壁!!苧衛(wèi)羔盟△叢!￡￡l垂叁塑魚基曼XB量MQ衛(wèi)I墨毯苧l叢生==△叢S鏨墨嬰墜蘭Q至!塾壁￡Q墜盥壘叢!堡指導教師姓名：圍堂塞煎援直昌太堂建箕王墨堂墮割盛拄盟直昌盤堂建筑王程堂瞳申請學位級別：王堂亟專業(yè)名稱：丞型丞魚王程論文提交日期：!!Q!生!且論文答辯日期：2Q叢生旦旦學位授了單位和日期：

2、直昌太堂!!Q生旦旦答辯委員會主席：評閱人：2005年月日STUDYoNVEGETATIoNCoVERAGEANDITSDYNAMICClIANGEBYREMoTESENSING—ACASESTUDYoFTHEPoYANGLAKEABSTRACTVegetationcoverage，theratioofvegetationoccupyingaunitareaisaveryimportantparameterinthestudyofcli

3、mateandecologicalmodels，andacomprehensiveindexoftheearth’ssurfacesituationcoveredbyvegetationcommunityThechangeandtheestimationofvegetationcoverageisimportantinthestudythechangeofecologyenvironmentsyetem、hydrology、ecolog

4、yandworldenvironmentchangeThispaperintroducesthebasictheories，thestudystatusandthedevelopingdirectionofthemethodsofmeasuringvegetationcoverageEstimationofvegetationcoveragefromremotesensingdatamaybeamoreefficientapproach

5、BasedOBthemethodofdimidiatepixelmodelandsubpixelmodelsforvegetationcoverageestimationThecurrentmodelisimprovedthemodelofderivingvegetationfractionfromnormalizeddifferencevegetationindex(NDVI)isestablished，Theimprovedmode

6、lisestimatingtwoimportantparametersoftheoldmodel，andthededucingprocessofthetwoparametersThemodelCanbeusedtoallkindsofvegetationtypesanddifferentscalesremotesensingdataOnthebaseoftheimprovedmodel，aexampleofthePOYANGLAKE，a

7、technicalprogramtoachievethemodelisdesignedFollowingthisprogramestimationinvegetationcoverageofthePOYANGLAKEdistrictin1989and2003，drawedtheimageofvegetationcoverageofthePOYANGLAKEdistrictOnthespotreviewsomeareaofthePOYAN

8、GLAKE，testingandverifyingtheresultofestimationofvegetationcoverageofthePOYANGLAKEdistrictin2003theresultshowsthatitisfeasibletoUSethisimprovedmodelinestimationofvegetationcoveragefromremotesensingdataInthispaperonthebase