基于sd模型的流域水生态承载力-研究——以铁岭控制单元为例

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1、西安建筑科技大学硕士学位论文2005-2012,theaveragewaterconsumptionofTielingcityaccountedfor48.7%ofwaterdemand,andtheaverageCODdischargeintotheriveraccountedfor266.7%ofthewaterenvironmentalcapacity.ComprehensiveanalysisoftheTielingwaterecosystemprovedthatthemaincavsesforthenegativeinfluencesonhealthwerethela

2、rgeamountsofpollutantsbeingdumpedintotheriver.(2)BasedonthebasictheoryofthecarryingcapacityofwaterecologicalandtheactualconditionoftheTielingwatersystem,threeobjectivefunctionsareestablishedforevaluationoverload.Theyarewaterbearinglimitcoefficient,thewaterenvironmentbearinglimitcoefficientan

3、dthewaterecologicalcomprehensivebearinglimitcoefficient.Thehigherthebearinglimitcoefficient,thehigherthebearingcapacityoverloadorlimiteddegreeshowed.(3)Thisstudyconsideredwaterresourcessupplyanddemandandthewaterenvironmentcarryingsystemasthemainresearchfocus.Itestablishedasystemdynamicsmodel

4、fortheTielingcontrolunit.Throughthisstudy,adevelopmenttrendofthewaterecologicalbearingcapacitywaspredicted.Theresultsincluded:thelimitingfactorsofthewaterbearingcapacityandthewaterenvironmentbearingcapacitythatwouldbeincreasinglyunderstress.(4)Ninemeasureswererecommendedtoimprovethewaterecol

5、ogicalcarryingcapacityoptimizationcontrolschemefortheworseningsituationofwatersenvironmentsysteminthecontrolunit.Aftertheimplementationofthenineprogramofmeasurestoprotectaquaticecosystems,waterecologicalcomprehensivebearinglimitcoefficientbythetargetyeardroppedfrom4.306to1.635(baseyearis1.70

6、1).ItcanensurethesustainabledevelopmentofpopulationandeconomicstabilityInthetargetdevelopmentsituationbasically.Keywords:Waterecologicalcarryingcapacity,Systemdynamicsmodel,Waterecologicalcomprehensivebearinglimitcoefficient,TielingcontrolunitThisstudyhasbeenfundedbythenationalwaterpollution

7、controlandmanagementofscienceandtechnologymajorprojects（2013ZX07501-005）万方数据西安建筑科技大学硕士学位论文目录1绪论...........................................................11.1研究背景与意义..............................................11.1.1研究背景...........................