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岷江上游地区生态环境脆弱性变化研究.docx

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岷江上游地区生态环境脆弱性变化研究 [Abstract] TheupstreamareaoftheMinjiangRiverisanimportantecologicalareainChina.However,duetothenegativeimpactofhumanactivities,theecologicalenvironmentinthisareaisbecomingmoreandmorefragile.ThispaperanalyzesthechangesintheecologicalvulnerabilityoftheupstreamareaoftheMinjiangRiverandputsforwardsomemeasurestoprotectandrestoretheecologicalenvironment. [Keywords] MinjiangRiver,upstreamarea,ecologicalenvironment,vulnerability,protection [Introduction] TheupstreamareaoftheMinjiangRiverislocatedinthewesternpartofSichuanProvince,withatotalareaofabout20,000squarekilometers.ItisanimportantecologicalareainChina,withrichbiodiversityandimportantecologicalfunctions.However,withtheincreaseofhumanactivitiesinrecentyears,theecologicalenvironmentinthisareaisfacingseverechallenges.Themainproblemsaresoilerosion,deforestation,andwaterpollution.InordertoprotectandrestoretheecologicalenvironmentoftheupstreamareaoftheMinjiangRiver,itisnecessarytoanalyzethechangesinecologicalvulnerabilityandproposeeffectivemeasures. [Body] 1.ChangesinEcologicalVulnerability Ecologicalvulnerabilityreferstotheabilityofanecosystemtowithstandexternaldisturbancesandmaintainastablestate.WiththeincreaseofhumanactivitiesintheupstreamareaoftheMinjiangRiver,theecologicalvulnerabilityofthisareahasbeencontinuouslychanging.Specifically,therearethefollowingchanges: 1.1.SoilErosion SoilerosionisoneofthemainecologicalproblemsintheupstreamareaoftheMinjiangRiver.Duetodeforestation,overgrazing,andotherhumanactivities,theforestcoveragerateinthisareahasdecreasedsignificantly,andthesoilerosionratehasincreased.Thesoilerosionnotonlyreducesthesoilfertilitybutalsoleadstothelossofwaterandsoilresources,whichseriouslyaffectsthesustainabledevelopmentofthelocalecologicalenvironment. 1.2.Deforestation DeforestationisanotherimportantfactorleadingtotheincreaseofecologicalvulnerabilityintheupstreamareaoftheMinjiangRiver.Treesplayavitalroleinmaintainingecologicalbalancebyregulatingthehydrologicalcycleandconservingsoilandwate