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                       ThreeGorgesReservoiroperationschemefacingtheneweraandnewdemands

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                                     1
                                                              1
                        GUOShenglian,WANGJun,XIEYuzuo,ZHONGSirui,HUTing,LIShuai
                            (1.StateKeyLaboratoryofWaterResourcesEngineeringandManagement,Wuhan 430072,China;
                  2.OperationandAdministrationCenterforRiverBasinHydroComplex,ChinaThreeGorgesCorporation,Yichang 443133,China)
                  Abstract:Thispapersummarizesthedesignflood,characteristicwaterlevels,andoperationschemevariablead
                  justmentofThreeGorgesReservoir (TGR);reviewstheresearchadvancementsofkeyregulationtechnologiesand
                  analysestheinflowwaterandsedimentofTGRinrecentyears.Twoapproachesconsideredtheregulationofupper
                  reservoirgroup ,i.e.,themostlikelyfloodregionalcompositionmethodandnon - stationaryfloodfrequencyanaly
                  sismethodareusedtoderivedesignfloodsandcharacteristicwaterlevelsduringTGRoperationperiod ,respective
                  ly.TheresultsshowthattheinflowsedimentofTGRinrecent10yearshasreduced84.4% comparedwithdesign
                  values ,thetotalhydrologicalterationrateofIHA - RVAindexreaches74% withasignificantchangeatYichang
                                                                                                  3
                  hydrologicstation ,1000 - yeardesigned7d - 15dfloodvolumesofTGRhavereduced8.15 - 14.28billionm ,and
                  themainconstrainconditionsoffloodprotectionandsedimentationinpreliminarydesignstageusedtodecideFlood
                  LimitedWaterLevel(FLWL)havechangedsignificantly.Thepreliminarydesignfloodat - siteandTGRoperation
                  scheme175 - 155 - 145misunabletosatisfywaterresourceshighefficientutilizationandeco - environmentalprotec
                  tioninthenewera.ItissuggestedthattheTGRoperationschemeischangedas175 - 160 - 155m ,whichisdy
                  namiccontrolwaterlevelbetween155 - 160m inthemainfloodseason ,advancerefilloperationafterthelatest
                  endingofMeiyuonAugust8,andrisewaterleveltoabout163,165and175mintheendofAugust,September
                  andOctober ,respectively.Theproposedschemecanreducediscardwaterinwet - seasonandincreasedownstream
                  watersupplyindry - season ,generate10% morehydropower,andhighoperationwaterlevelisbenefitfornaviga
                  tionandabletoreducereservoirrecessionzone ;lessornostorewaterinSeptembercanreduceeco - environmental
                  adverseeffectsonthedownstreamandtwolakesduringrefilloperationperiod ,whichhassignificanteconomic,so
                  cialandecologicetc.comprehensivebenefits.Ifthepossiblebasin - scalelargerfloodispredicted?forecastedinthe
                  YangtzeRiver ,theTGRwaterlevelshouldlowerdowntoFLWL145m assoonaspossibletoensuredam and
                  downstreamfloodpreventionsafety.
                  Keywords:ThreeGorgesReservoir;designflood; typicalwaterlevels; operationscheme; dynamiccontrol;
                  advancerefill;waterresources;highefficientutilization

                                                                                    (责任编辑:耿庆斋)



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