重慶壁山土地利用對水土流失生態(tài)格局的影響研究.pdf

1、西南師范大學碩士學位論文重慶壁山土地利用對水土流失生態(tài)格局的影響研究姓名：高喜明申請學位級別：碩士專業(yè)：生態(tài)學指導教師：魏虹20050601TheimpactofLanduseontheecologicalpatternofsoilerosionmBishanCountyChongqingChinaMajor:EcologyTutor:Dr.WeiHongSpecialty:AppliedecologyGraduate:GanXiMin

2、g(2003704)(SchoolofLifeScienceSouthwestChinaNormalUniversity)AbstractThehumansabilitytoexploitandutilizethenaturalresourcesisincreasingwiththehighdevelopedproductivityanddrasticconflictbetweenthelimitlandresourcesandthei

3、ncreasingpopulation.Underthesituationofpoorenvironmentalprotectionrealizationandthelaggedharnesstheecologicalenvironmentisbecomingworse.Soilerosionistheresultofpeoplesunscientificlanduse.Basedonlandscapeecologytheorythee

4、cologicalpatternoflanduseandsoilerosioninBishanCountywasstudiedquantitativelyinordertoknowandimprovescientificallyandfullytheecologicalenvironmentin止。studyregion.UsingGIssoftwareARCVIEW7landscapeindices(DiversityEvenness

5、DominanceFractaldimensionFNFSandIsolation)werechosentostudythespatialpatternsofthelanduseandsoilerosioninBishanCounty.Theresultsshowedthat:(1)InBishanCountyslopingfieldsandpaddyfieldswerethemainlandusetypesandforestshada

6、littledistributionwhiletheareasofotherlandusetypeswererelativelysmall.ThelandscapedominanceandfragmentationwererelativelyhightheIsolationindiceswererelativelylowandthedistributionofpatcheswasrelativelycentralized(2)Theso

7、ilerosionweremainlydistributedinslopingfieldsandpaddyfields.Thedominantdegreeofsoilerosionwasrelativelylowandeverygradeofsoilerosionhadsomedistributionarea.AsawholethefragmentationofGrade12and13wasrelativelyhighandthefra

8、gmentationofGrade11washighest.Thedistributionofpatcheswascentralizedandhadalowseparationdegree.(3)Ingeneralthesoilerosionhappenedindifferentlandusetypeshadalowdominatedegree(exceptOrchard)andeverygradesofsoilerosioncould