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ThreeGorgesReservoiroperationschemefacingtheneweraandnewdemands
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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
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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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