基于结构方程模型的滇池流域水环境质量影响因素研究

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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