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1、StrategicEnvironmentalAssessment(SEA)andEnvironmentalImpactAssessment(EIA)fortheHydropowerDevelopmentPlaninYunnanProvince，ChinaOuXiaokunYangYonghong(1InstituteofEcologyandGeobotany,YunnanUniversity,Kunming，Yunnan2AppraisalCenterforEnvironment&Engineering．Yunn
2、anProvincialEnvironmentalProtectionBureau，Kunming，Yunnan)Abstract：ThispaperintroducesthedevelopmentprocessofStrategicEnvironmentalAssessment(SEA)fromhomeandabroad,andelaboratesthedefinitionandresearchapproachforSEA．WiththerapidhydropowerdevelopmentinYunnanPro
3、vince，theenvironmentalimpactassessments(ETA)forhydropowerdevelopmentplansinseveralwatershedshavebeencarriedoutintherecentyears．FollowingtheexperiencesandlessonslearnedfromtheEIAsonhydropowerdevelopmentplansinYunnan，somekeyissuesintheenvironmentalimpactassessm
4、entforthesimilarplanshasbeenproposed,includingacorrectcommandoftheEIApoliciesandthecoordinationbetweengovernmentlineagencies，whichfocusesontheaccumulativeenvironmentalimpactbyhydropowerdevelopment，theeffectiveprotectionfortheaquaticcsp．fishes，theminimumecolog
5、icalwaterflowintherivers，publicparticipationinthewholeassessmentprocessandsoon．Keywords：SEA;Environmentalimpactassessmentforplans;Hydropowerdevelopment;Yunnan1DevelopmentofSEATheNationalEnvironmentalPolicyActbyUSAin1969definedclearlythateveryproposalorlegisla
6、tivereport，plan，decisionorotherbigfederalactivitiesmadebythefederalgovernment，whichcouldresultinbigimpacttothehumanenvironmentalquality,shouldcarryouttheenvironmentalimpactassessmentEIA)．Anyonewhohasproposedthedecisionplanshouldberesponsibletosummitthereporto
7、fenvironmentalimpactassessment．Inthemiddleof1970s，someEuropeancountrieshaveexpandedtheapplicationofEIAfromprojectleveltothepolicyandplanninglevel(Steenhofeta1．，2007)．Sincethesustainabledevelopmentstrategyappearedattheendof1980s，theStrategicEnvironmentalAssess
8、ment(SEA)hasbeenacceptedbroadlyintheworldbecauseoftheattributeofmoremacro-perspective．Forexample，Hollandestablisheditslegalinstitutionofstrategicenvironmentalassessmentin1987，demandingtha
