欢迎来到天天文库
浏览记录
ID:32251359
大小:3.43 MB
页数:60页
时间:2019-02-02
《气候变化和人类活动对水资源的影响的的研究——以北洛河流域为例》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、AbstractSincethe1970s,theglobalclimatehaschangedimmenselyandhuman’Sactivitieshaveincreasednotably,whichhavegreaterinfluenceonwaterresources.Theclimatechangeswillchangethecurrentconditionoftheglobalhydrologiccycleandleadtotherearrangementsinspaceandtimeandchangesinquantityo
2、fwaterresources,whichhaveadirectimpactonrainfall,evaporation,runoff,soilhumidityandSOon.Besides,thesehugechangeswillalsoresultintheaggravationofhydrologiccycleandaffecttheregionalwaterresources.Human’Sactivitiesarelikelytoinfluencemechanismofrunoffproducingandconfluencethr
3、oughchangingwatershedunderlayingsurfaceandhaveadeepimpactonriverrunoff.Inrecentyears,、Ⅳitllthecombinedeffectsofthefrequentincreasesofhuman’Sactivitiesandthestrongerosionofnaturalfactors,runoffdecreasedandseasonalcutoffintheNorthernLuoRiverBasinhavebecamemoreandmoreserious,
4、whichseriouslyaffectedwaterresourcesdevelopmentandutilization.Therefore,studyingtheeffectsofclimatechangesandhuman’SactivitiesonwaterresourcesoftheNorthemLuoRiverBasinhavegreatsignificancetothelayout,theoperationmanagementandthereasonableexploitationofregionalwaterresource
5、s.What’Smore,thestudywillbevitallybeneficialtobuildthewatersavingsociety.Themainresultsaleasfollows:1)Variationtrendsofhydro-meterologicalfactorssuchasprecipitation,evaporationandrunoffintheNorthernLuoRiverbasinwereanalyzedwithmovingaveragemethodandSpearmanrankcorrelationm
6、ethodrespectively.Theresultsshowthattheyalealldeclining.2)Thispaperanalyzedtherunofftimeseriesfrom1959to1999oftheLiujiaRiverandJiaokouRiverhydrologicalstationontheNorthemLuoRiverbyR/Sanalysismethod.Theresultsshowthat1978isthetransitionpointofhydrologicalseriesoftheNorthern
7、LuoRiverBasin,andhumanactivitieshaveaffectedsignificantlyonhydrologyoftheNorthernLuoRiverBasinafterl978.3)Usingthehydrologicalandmeteorologicaldatainnaturalenvironment,theBPneuralnetworkmodelparameterswerecalibratedfirst,thenkeptthemodelparametersconstant,thenaturalrunoffi
8、nhumanactivitiesaffectperiodwasgottenthroughinputtingthehydrologicmeteorologicaldatainthe
此文档下载收益归作者所有