简介：

简介：

简介：

简介：TheTangjiashanlandslidedamfailedonJune10,2008,whichwasthelargestoneformedduringtheWenchuanearthquakeinChina.Nohumanliveswerelostinthisdamfailure.Thispaperpresentsadescriptionofthedam,includingthedamgeometry,thehydrographandthereservoircapacity,thediversionchannelandthedrainagefromthelake.Severalempiricalmodelsareappliedtopredictthebreachparameters,thepeakoutflowsandthereservoirvolumesduringthisbreachevent.Themainobjectiveofthestudyistocomparevariouspredictionmodelsandtomakerecommendationofthebestmodelforthepredictionofthebreachwidth,thefailuretime,andthepeakoutflow.ThebreachwidthspredictedbytheFroehlichmethodswithconsiderationsofthereservoirstoragesandtheeffectoffailuremodeareconsideredtobemorereasonable.Allpredictionmethodsdiscussedinthispaperarefoundtounderestimatethebreachformationtimeduetothecomplexmaterialandthelargethicknessofthedam.Theresultsfromthesoilconservationservices(SCS)methodcomparewellwiththeobservedpeakoutflow.TheMaronemethodincombinationwiththecoefficientexpressionsproposedbyMacchionegivesexcellentresultsinthesimulationofthereservoirvolume-levelcurve.

简介：

简介：

简介：

简介：

简介：Thereport(around80,000Chinesecharacters)onthedevelopmentandmajorissuesofsmallhydropowerintheAsia-PacifichasbeencompletedbyHRCrecently.

简介：4HYDROPOWERDEVELOPMENT4.1Historyofhydropower4.1.1BeginningofthedevelopmentofhydropowerInJapan,1860to1890wasthcperiodofrapiddevelopmentofthemodemStateandtheestablishmentofcentralizedauthority.AfterconstructingtheframeworkforthemodemState,theGovernmentpursuedapolicyofeconomicmodernization.NewindustrieswerestimulatedbyestablishingGovernment-managed

简介：Inresponseto“goingglobal”approachandabidingbytheprincipleofsustainableandcoordinateddevelopment,muchprogresswasscoredinHRC'sinternationalSHPcooperationin2004,particularlyintermsofexploringandimplementingconcreteSHPengineeringprojects.

简介：

简介：TheLudaoLakewithanareaof0.86km2and50%watersurfaceratio,wastakenasanexampletostudytheeco-hydraulicstechniquesforpreventinglakeeutrophication.Besidesexternalwaterinflowandoutflow,thetermrelatedtointernallocalflowcirculationwasaddedinthecontinuityequationoftwo-dimensionalhorizontalhydrodynamicmodel,andfurtherthehydrodynamicmodelwascalibratedbythescenarioofnowaterexchange.Thevelocityof0.2m/swassuggestedtobethecriticalvelocityofcontrollingalgalbloom.Toachievethecriticalvelocityinthewholelake,threefactorswereanalyzed,whicharewind,artificialexternalinflowaugmentationandinternallocalflowdisturbancebypumpcirculation.Itisfoundthattheroleofwindcanbedisregarded.Fortheeco-hydraulicstechniqueofexternallakewaterinflowaugmentation,thewaterflowingrouteshouldbefirstlyoptimized,further,thelakeinflowhasacriticalvalueunderspecifiedwaterlevelduetothenarrowinlets,sothewholelakeisdifficulttoreachthecriticalvelocitytopreventalgalbloom,andacombinationofexternalinflowaugmentationandinternallocalflowingdisturbanceshouldbeconsidered.Simulationresultsshowthatthecombinationofexternalwaterinflowaugmentationandinternallocalflowdisturbancerequireslesseco-flowtoachievetheglobalcriticalvelocitythanthesoleinternallocalflowdisturbance,fortheLudaoLake,theformerrequirestotaleco-flowof25m3/s,whichreducesby50%thanthelatterrequiringtotaleco-flowof52m3/s.