WetlandEcosystemServiceEvaluationofFenheRiver

ProcediaEnvironmentalSciences10(2011)2118–21221878-0296©2011PublishedbyElsevierLtd.Selectionand/orpeer-reviewunderresponsibilityofConferenceESIAT2011OrganizationCommittee.doi:10.1016/j.proenv.2011.09.331Availableonlineat(2011)000–[e-mail]vironmentofFenheRiverbasin,riverwetlandecosystemrestorationprojectwasplanned.Fourmethodswereappliedinthispapertoevaluatethewetlandecosystemservicesaccordingtotheplan,whichweremarketvaluemethod,shadowprojectmethod,resultsreferencemethodandexpensepaymentmethod.Theresultsshowedthatthetotalvaluewas234millionrmbyuan,inwhichthevalueofwaterpurificationwasthebiggest,accountingfor46.1%.However,asnotallthefunctionsweretakenintoconsiderationduringthestudy,smallerresultwasproduced.Meanwhile,accordingtothemainfunctionsofthefivepartsintheplan,theirbasicvalueswerecalculated.Itsuggestedthatthebasicvaluewasdeterminedbybothareaandvaluecoefficient.ThethirdpartYiDamtoErDamhadthehighestvaluebecauseofthelargerareaandthebiggestvaluecoefficient.©2011PublishedbyElsevierLtd.Selectionand/orpeer-reviewunderresponsibilityof[nameorganizer]Keywords:wetland;ecosystemservice;evaluation;FenheRiverIntroductionEcosystemserviceisdefinedastheconditionsandprocessesmeetingandmaintaininghuman’sneedssuppliedbynaturalecosystemanditsspecies.Theevaluationofwetlandecosystemserviceisaevaluationprocesstoconverttheabstractserviceintoappreciablepriceofmoneybytakingevaluationmethods[1].Ecosystemfunctionsandthevalueswereclassifiedintofour(regulation,habitat,productionandinformation)andthree(ecological,socio-culturalandgroup)types,respectively[2].Theevaluationmethodswereclassifiedintothreetypesthatwerecontingentvaluationmethod,alternativemarketmethodanddirectmarketmethod[3].Tenmainmethods(marketvaluemethod,productionfunctionmethod,opportunitycostmethod,shadowprojectmethod,productivityvarietyapproach,humancapitalapproach,travelcostmethod,hedonicvaluemethod,contingentvaluemethodandecologicalvaluemethod)werecomparedbyFuandDing[1].Basedonthesemethods,servicefunctionsofSanyangwetlandinHangzhou,MaipomarshinHongKongandPanjinAreawereevaluated[4-6].Inthispaper,riversidewetlandecosystemservicevaluesofhydrologicaladjustment,climateregulation,waterpurification,entertainmentsandlife-supportingwereevaluatedbyusingmarketvalue©2011PublishedbyElsevierLtd.Selectionand/orpeer-reviewunderresponsibilityofConferenceESIAT2011OrganizationCommittee.2119XUHeetal./ProcediaEnvironmentalSciences10(2011)2118–2122Authorname/ProcediaEnvironmentalSciences00(2011)000–000method,resultsreferencemethod,shadowprojectmethodandexpensepaymentmethod.Andbasicvaluesofthefivepartsintheplanwerecalculatedaccordingtotheirfunctionorientations.BackgroundThehumanactivityintensityofFenheRiverbasinisthebiggestinShanxiProvince.Inrecentyears,thehealthofriversidewetlandecosystemwasthreatenedbybothwaterresourcesquantityandqualitybecauseofflowreduction,overexploitationandsewagedischarge.Inordertosolvetheecosystemissue,riverwetlandecosystemrestorationprojectwasplanned.Thewetlandrestorationprojectaimedtoturntheexistingwetlandintonormalstatebysupplyingwaterresourcestoecosystem,controllingthepollutionandallrestorationandmanagement.Besides,constructedwetlandswouldbebuiltinsomeimportantareastoexerttheirallfunctionsandbenefitsfurthest.Thewetlandswereplanned783haoccupiedareatobuildlandscapealongtheriver,wetlandparksandwaterpurificatingsections.Table1givestheconstructionscheme.Table1ConstructionschemeofFenheRiverwetlandNo.locationarea[ha]functionorientation1Lancun~ChaicunBridge180landscape,ecotourismarea2Chaicun~XiaodianBridge228landscape,entertainment3YiDam~ErDam200Constructedwetland,pollutantstreatment4SanDamreservoirarea75park,ecotourismarea5LinfenCity100park,entertainmentMethodsTocomparethevaluesofdifferentservices,totalvaluesoffiveareaswerecalculated.Andtocomparethevaluesofdifferentareas,themainservicesvaluesofeachareawerecalculated.Basedontheconstructionscheme,gainedbasicdata,fieldeditinvestigation,themainservicefunctionswereevaluatedbythefollowingmethods.(1)Valueofhydrologicaladjustment(V1).Wetlandecosystemcanstoragewaterresources,accomodatethequantitiesofthewetlandrunoffandgroundwateraround.Infloodyseasons,theredundantwatercanbetransportedbythewetlandtoriversandseas,whichlettheareasavoidfloodlossescausedbyexcessivewater.Howere,inthedroughtyseasons,thewaterresourcesinthewetlandcanbeusedtoirrigate.Servicefunctionofhydrologicaladjustmentcanbeevaluatedbyresultsreferencemethod(seeEq.1).V1=A×AU(1)WhereAandAUaretheareaofthewetlandandthevalueperarea,respectively.Thecoefficientofvalueperareareferstotheexistingstudies.ThecoefficientAUr