欢迎来到天天文库
浏览记录
ID:33673759
大小:5.71 MB
页数:51页
时间:2019-02-28
《基于结构方程模型的滇池流域水环境质量影响因素研究》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、~华中农业大学2012届硕士研究生学位论文——————————————————————————————二二二—二二==_二二==2._一—~AbstractDianchiLakepresentsaseriousstateofeutrophicationandasharpdeclineinwaterqualitywiththerapiddevelopmentofeconomicandurbanization.Thereisanintricaterelationshipbetweensocio—economic,landuseandwate
2、rqualitywithinthehasinmge.Multitudinousfactorsmighthaveeffectonqualityofwaterenvironment.Tosttldytherelationshipbetweenwaterquality,socio—economicandlanduseandfindoutthekevfactorsthataffectwaterqualityisofgreatsignificancefortheprotectionofDiaJlchiLakewaterenvironmentand
3、integratedmanagement.ThisresearchusedtheStructuralEquationModelingtostudyfactorsthatinfluencethewaterenvironmentqualityofDianchiLake.Takingsocio—economicdevelopment.1anduseandwaterpollutionasmodellatentvariables,selectingthepossiblefactorsasmeasurementindexofeachlatentva
4、riable,andaccordingtothecausalrelationshipbetweenwaterquality,socio—economicandlandusebuiltthehypotheticalmodel.Thisresearchused8subbasinsdataofDianchiLakein2008asthemodelsample.andusedBootstrapmethodtorealizethesampleaugment.Thoughmodelparameterestinlation.fittinginspec
5、tionandmodification,theoptimalmodeltofigureouttheafirectingrelationsmadthedegreeofinfluenceamongfactorsandbetweenfactorsandindicators、vasobtained.Thisstudyalsopresentedthesuggestionsonintegratedriverbasinmanagementbasedontheoptimizationmodel.Theresultsshowedthatsocio—eco
6、nomicwasthedominantfactortoinfluencewaterqualityofDianchiLakebasin,whichnotonlyhaddirectimpactonwaterenvimnmentquality,butalsohadindirectimpactthroughthechangeoflandusepattemsonit.Amongthesocio。economicfactorswhichhadsignificantinfluenceIDnwaterquality,thein‘:reaseofurba
7、nizationrate,GDPannualgrowthrate,animal]husbandryandunitarea(,utputgrowmoffarmingcouldexacerbatethewaterpollution;Improvementofoutputvalueoftertiaryindustryandproportionofsewagetreatmentrate1veillpromotetheameliorationof、ⅥlterenVlro衄ent·Amongthelandusefactorsthatobviousl
8、yaffectingthewaterquality,Increaseoftheproportionofforestlandandaverageshapeindexofcultivatedlandcouldm
此文档下载收益归作者所有