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1、SummaryabouttheMiyunHydropowerTheMiyunReservior,stridesacrossCaoRriverandBaiRiver,twentykilometersfromtheMiYun,islocatedinthenorthofthat.ThetworiversarecombinedintoCaoBaiRiver,whichistenkilometersfromtheMiYuntown,inthenorthofthetown.ThelowestwatershedoftheCaoR
2、iverandBaiRiverisJinGouRiver,whoseheightis130meters,inwhichCaoRiverReserviorandBaiRiverReserviorarejoined.TheelsepartoftheCaoRiverandBaiRiver,whoseheighthighermorethan130meters,combinedintoareservoir,namelyMiYunReservior.Theseveral—annualmeanriverdischargeis50
3、.5m3/s.TheMiYunReservior,whosemainmaskarecontrollingfloodandsupplyingwaterforagriculture,isanintegratedhydraulicengineering,andalsocouldsupplywiththebenefitofgeneratingelectricity.Somecharacteristicwaterlevelofthereservoirasfollows:Deadwaterlevel:126.0m;Normal
4、highwaterlevel:157.5m；Designfloodlevel:158.2m；Checkfloodlevel：159.5m;Heightofthetopofdam:160.00m.Mainmarineconstructioninclude:(1).Blockwaterstructures:TheBaiRiverdamandtheCaoRiverdamconsistintothetwoMaindamsandfivesecondarydams,arerolled—outearthrockdam;thehi
5、ghestdamistheBaiRivermaindam,whoseheightis66.4m；CaoRivermaindamhighs56m;eachsecondarydamhigh15.7m-39.0m.(2).Outletstructures:①.Spillway:includingtwoonesintheleftshoreoftheCaoRiver,firstspillwayandsecondspillway.Thefirstspillway,isanormalone,whosebottomheightis
6、140m,draingthe100—annualflood,whichisfiveholesriversidetypewithbosomwall.Thesecondspillway,isaabnormalone,whosebottomheightis148.5mcombiningwiththefirstone,drainingthe1000—annualflood,whichisfiveopenriversidetype.②.Tunnel:a.Thegenerateelectricitytunnelinthelef
7、tshoreoftheBaiRiver,generatingelectricityandsupplyingwithwaterfordownstreamagriculture;aoutletsupportingtunnelissettedattheupriveroftheregulating—pressurewell,whosefunctionisdrainingthe1000—annualsuperflood.Theintaketower,theheightofwhoseinletbottomis116m,thed
8、iameterofwhichis6m,thelengthofwhichis416m,whoseinclinationis1:400;Theregulating--pressurewelliscyclindertype,whoseinnerradiusis17.1m,behindwhichtherearetwoimbedded—pressuretypestee
