三峡大坝介绍【英文】

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1、GeographyCaseStudy-ChangJiangConsandProsoftheThreeGorgesProjectIntroductionChina'smassiveThreeGorgeshydroelectricprojecthasgeneratedplentyofcontroversyfromthestart.Itwasfirstproposedin1919byrevolutionaryleaderSunYat-senasawayofprovidingenergytofuelthenation'sindustrialdevelopment.The

2、planwasrevivedin1954asawaytocontrolthechronicoverflowofthelegendaryYangtzeriveraftertensofthousandswerekilledinwidespreadflooding.Afterseveralfalsestarts,workbeganinearnestin1979.AdvocatessayChina'sdevelopmentdependsonit.Theysayitwillprovideacleansourceofenergyforfuturegenerations.But

3、criticssayitcouldbeamonumentalecologicaldisaster.Thedam'ssluicegateswereclosedonJune1,2003,allowingthereservoirbehindittobeginfilling.ByJune10,2003,thewaterwas135metresdeep,andit'sexpectedtobe175metresdeepby2009.FactsThe16-yearprojectisduetobecompletedin2009.Theriver'slevelisexpectedt

4、oriseto175metres.Bymid-June2003thedamwasholdingback12billioncubicmetresofwater.Thedam'sstoragecapacityisnearly40billioncubicmetres.Itwillcreatea658-sq.-kmreservoir.Itsconcretewallis192metreshigh.Ithasatotalof22sluicegates.Itwillhave26700-megawattturbinegenerators.Theyareexpectedtoprod

5、uce18.2millionkilowattsby2009.ElevenofthereactorswereinplaceasofJanuary2005.Ithastheworld'slargestlocksystem,6?kilometresinlength.Thelockliftsandlowersshipsinfivestages.ThedamislocatedinYichang,inthecentralprovinceofHubei.It'sChina'sbiggestengineeringprojectsincetheGreatWallwasbuiltmo

6、rethan2,000yearsago.Totalprojectedcost:180billionyuan($26.5billion).Locationof‘Sanxia’AmanfishesaswaterflowsthroughwaterdiversionholesoftheThreeGorgesDamontheYangtzeRiverincentralChina'sHubeiProvince,June11,2003.Some10waterdiversionholeswereopenedtoreleasewater.ThewaterleveloftheThree

7、GorgesReservoirreached135metres(433feet)onJune10.(APPhoto/Xinhua,DuHuaju)TwomencarrybrickstoabargeatthetemporarydockatWushan,inthemiddleoftheThreeGorgesontheYangtzeRiverincentralChina,June6,2003.Lowerlyingareasofthetownhavebeendemolishedinpreparationfortheincreaseinthewaterlevelasthec

8、ontro