1、分類號(hào)UDC密級(jí)編號(hào)盤!!塵塹學(xué)位論文基于遙感的植被覆蓋度估算及其動(dòng)態(tài)研究——以鄱陽(yáng)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(dǎo)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(qǐng)學(xué)位級(jí)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(xué)位授了單位和日期：

2、直昌太堂!!Q生旦旦答辯委員會(huì)主席：評(píng)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