贝加尔湖畔英语ppt

LakeBaikalLakeBaikal,whichtodayislocatednearthecenterofAsia,ismostlikelytheoldestlakeintheworld.Itbeganforming25millionyearsagoasAsiastartedsplittingapartinseriesofgreatfaults.TheBaikalvalleydroppedaway,eventuallyfillingwithwaterandcreatingthedeepestoftheworld'slakes.LakeBaikalistheworld'slargestanddeepestfreshwaterlake,knownastheblueeyesofSiberia.Typestripisbent,likethecrescentmoon,soitiscalledMoonLake.Itis636kilometerslong,theaveragewidthof48km,thewidthof79.4kilometers,theareaof31thousandand500squarekilometers,withanaveragedepthof744meters,thedeepestpointof1620meters,Lake456metersabovesealevel.Itholdsonone-fifthoftheworld'stotalfreshwater,whichismorethanwaterinspiteofitslessthanimpressiveareabecauseitisbyfartheworld'slake.thetotalofallthewaterinfivegreatlakes;itholdssomuchfreshThereare336riversintotheLakeBaikal.Crescent-shapedlakeBaikal,inSiberia,isonlytheninthlargestlakeinareaat385miles[620km]inlengthand46miles[74km]inwidth,yetitiseasilythelargestbodyoffreshwaterintheworld.Thelakehasavarietyofmarineandplantlife.InthelaketothenorthintotheoutletoftheAngarariverthereisahugeboulder,calledthesacredstone.BeautifullegendBaikalwildanimal,asthemostconspicuousofwaterseal.TalkoftheLakeBaikal,thefirstthoughtistheBaikalLakemonster.becausetheLakeBaikalmonster,itcoveredwithalayerofmystery.AndbecauseoftheLakeBaikalgenerationage,manyrareanimalslivinginthelake,istheworld’smostendangeredendemicanimalsplantsinLake,thereare848speciesofanimalsandfish.TheLakeBaikalmonsterProblem:wastewaterofpaperpulpisbeingpouredintothelake.Inwinter,thefrozenlaketo1mabovethedepth,for4-5months.But,thetemperatureofthedeepwithinthelakehasremainedthesame,about3.5degreesCelsius.