基于dem的黄土坡面景观结构研究-以陕北黄土高原为例

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1、University—ResearchontheLoessSlope·-LandscapeStructureBasedonDEMoaseStudyinShanbeiLoessPlateauCandidate：SunJingluCollege：CollegeofGeographicalScienceSupervisor：Prof．TangGuoanSpeciality：CartographyandGISDateApproved：May,2011、∑．0学位做作者签名．n泵禄日进行的研究工数据和有关材含其他人或其究所做的贡献期：加IJ’f、刁学位论文使用授权声明研究生在

2、校攻读学位期间论文工作的知识产权单位属南京师范大学。学校有权保存本学位论文的电子和纸质文档，可以借阅或上网公布本学位论文的部分或全部内容，可以采用影印、复印等手段保存、汇编本学位论文。学校可以向国家有关机关或机构送交论文的电子和纸质文档，允许论文被查阅和借阅。(保密论文在解密后遵守此规定)保密论文注释：本学位论文属于保密论文，保密期限为年。学位论支作者签名：孙隶禄指导教师签名：场日期：弘f『、皇、刁日期：矽f／、}．为AbstractSlope—landscapes仇lcturereferstospatialarrangementandrelationshipofs

3、lopewithdifferentslopeformsandslopepositions．Slopeisthebasiccomponentofgroundsurface．ChangesofvariouslandscapesCanbedirectlyregardedaschangesoftheslopescharacteristicandcombination．Innature，differentslopepositions(e．g．slopeshoulder,backslope，toe，etc．)andslopeforms(suchastheconcaveslope

4、，convexslope，straightslope，etc．)resultindifferentcharacteristicspresentedbymanygeographicalprocesses(suchasthesoil，hydrology,geomorphology,etc．)andtheassociatedman-landsystems．Therefore，theslopeinformationisofgreatsignificanceforthestudyofgeographicalorecologicalprocessesrelatedwithter

5、rain．Inthisstudy,westudytheslopeformsasentrypoint，anddiscussthespatialstructureofloessslopeindifferentgeomorphologyareastobetterrecognizespatialpatternofloessgeomorphologyform．WithhighresolutionDEMasdatasourceandtheintroductionofobject—basedimageanalysismethod，weextractslope-landscapee

6、lementsbasedoneCognitionsoftware．Onthisbasis，combinedwithquantitativemethodsoflandscapeecology,weanalyzeslope-landscapesn-IlctIⅡ．eanditsspatialdistributioninShanbeiLoessPlateauquantitativelyfromhorizontalandverticalangles．Theresultsshowthatslope—landscapehorizontals仇lctureshowsrelative

7、lyconsistentrulesfromthreeaspects(number,shape，spatialdistribution)．Slope-landscapeverticalstructureischaracterizedbyahnostthesamerule，onlyalittledifferencesbetweensixgeomorphologyplotsfromnorthtosouth．Spatialdistributionofslope—landscapestructureintheLoessPlateaushowsgraduallyvariat