资源描述:
《the-aral-sea-咸海》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、TheAralSeaOutlineTheAralSeaLocationEarlyDaysShrinkageCauseEffectSolutionLocationTheAralSeaisasalinebasininCentralAsiaanditliesbetweenKazakhstaninthenorthandUzbekistaninthesouth.Thenameroughlytranslatesas"SeaofIslands",referringtomorethan1,500islandsthatoncedotteditswaters.EarlyDaysOnceamongth
2、efourlargestlakesoftheworldwithanareaof68,000squarekilometers,TheAralSeawasespeciallyprosperousinitsfishingindustry.ShrinkageTheAralSeahasbeensteadilyshrinkingsincethe1960saftertheriversthatfeditweredivertedbySovietUnionirrigationprojects.By2007ithaddeclinedto10%ofitsoriginalsize,splittingint
3、othreelakes–theNorthAralSeaandtheeasternandwesternbasinsoftheoncefarlargerSouthAralSea.By2009,thesouth-easternlakehaddisappearedandthesouthwesternlakeretreatedtoathinstripattheextremewestoftheformersouthernsea.ThemaximumdepthoftheNorthAralSeais42meters.CauseIn1918,theSovietgovernmentdecidedth
4、atthetworiversthatfedtheAralSea,theAmuDaryainthesouthandtheSyrDaryainthenortheast,wouldbedivertedtoirrigatethedesert,inordertoattempttogrowrice,melons,cereals,andcotton.30millionroubles(苏联卢布)wasspentonthescheme,andLenin(列宁)saidthat"Irrigationwilldomorethananythingelsetorevivetheareaandregener
5、ateit,burythepastandmakethetransitiontosocialismmorecertain“.ThiswaspartoftheSovietplanforcotton,or"whitegold",tobecomeamajorexport.Thisdideventuallyendupbecomingthecase,andtodayUzbekistanisoneoftheworld'slargestexportersofcotton.Actually,thedisappearanceofthelakewasnosurprisetotheSovietsandt
6、heyexpectedittohappenlongbefore.Asearlyasin1964,AleksandrAsarinattheHydroprojectInstitute(水利工程学院)pointedoutthatthelakewasdoomedexplaining,“Itwaspartofthefive-yearplans,approvedbythecouncilofministersandthePolitburo(政治局).Nobodyonalowerlevelwoulddaretosayawordcontradictingthoseplans,evenifitwas
7、thefateoftheAralSea."Effectenvironment,economy,publichealthTheecosystemoftheAralSeaandtheriverdeltasfeedingintoithasbeennearlydestroyed,notleastbecauseofthemuchhighersalinity.Therecedingseahaslefthugeplainscoveredwithsaltandtoxicchemicals–the