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1、-Effectsoflanduseonkarstgroundwaterqualityandquantity——AcasestudyinDiaojiangriverbasinofGuangxiMajor:EcologyStudyorientation:AppliedEcologyGrade:2005DissertationSupervisor:TutorShiJianName:HuangChen-huiAbstractInrecentyearslandusechangeanditsimpactontheenvironmenthasbecometheforefrontan
2、dhotspotsofglobalchangeresearch,becausealanduseisthemostprominentlandscapesignsintheEarth'ssurfacesystem,itcanreflectonhumanactivitiesontheecologicalenvironment.Withincreasinghumanactivities,thenaturalkarstecologicalenvironmenthasbeendevastated,karstgroundwaterchangesareveryoutstandingp
3、roblems.Throughlandusechangethehumanhasproducedasignificantimpactonthevulnerableandsensitivekarsthydrologicalsystems.MarkEllaway,andmanyforeignscholarsstudiedlanduseimpactonkarstgroundwaterquality,butitmoreconcentratedinresearchesonasinglepointorblocksizeandcertaintypeoflandledtochanges
4、inthewaterquality,andlackedresearchesonbasinorgreaterregionalscaleandtypeofcombinedlandusechangesinfluencedthewaterquality;forwaterquantity,therewereonlyconfinedthatachangeofforestorgrasslandonthesupplyofkarstgroundwaterisincreasingordecreasingandtheconstructionofdrainagesystemsandother
5、humanactivitiesresultinginlessaquiferrechargeandwaterdepletion;inthecountryYuanDao-xianAcademicians,JiaYa-nan,JiangYong-junandotherresearchers,usingpreviouslandusemaps,informationandgroundwatermonitoringdata,forthebasin,intermsoftimeandspaceonthesequence,analyzedlawsthatlanduseeffectkar
6、stwaterqualityinrespectiveresearchareas,theresultsshowedthekarstgroundwaterqualityandlandusechangeswereconsistentindynamicchanges,andlandusechangedkarstgroundwaterqualityinthetimeandspacehadeitherapositivesideoranegativeside;fortheresearchesofkarstgroundwaterquantitychanges,theseonlyhad
7、agriculturallanduseconversionandexcessiveexploitationofundergroundwaterresourcescausedsignificantchangesofwaterquantity.Thispaperonthebasisofpreviousresearchexperiencesandachievements,forstudyinDiaojiangRiverBasininGuangxi-thetypicalkarstwatershedofthesouthwestregion,combiningw
