本文關(guān)鍵詞：論河流生態(tài)環(huán)境需水，由筆耕文化傳播整理發(fā)布。

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Numericalsimulationofoverflowinsteppedspillway

CHENQun,DAIGuang2qing,LIUHao2wu111

(11CollegeofWaterResourcesandHydropowerSichuanUniversity,Chengdu　610065,China;

21StateKeyHydraulicsLab.ofHighSpeedFlows,SichuanUniversity,Chengdu　610065,China)

Abstract:Thek-εturbulencemodelisappliedtosimulatethecomplicatedoverflowinthesurfaceofsteppedspillway.Thenon2structuregridisusedtothethevolumeoffluidmethod(VOF)forwater2airtwo2phaseflowisofcalculation.Thecurvilinearfreesurface,velocityandThecalculatedresultisingoodagreementwiththeexperimentalKeywords:kmodel;numericalsimulation;freesurface(上接第19頁)

Onwaterdemandofriverecosystem

NIJin2ren1,2,CUIShu2bin,LITian2hong31,2,JINLing1,2

(11PekingUniversity,Beijing　100871,China;

21KeyLaboratoryofWaterandSedimentSciences,MinistryofEducation,Beijing　100871;

31YellowRiverConservancyCommission,Zhengzhou　450003,China)

Abstract:Areviewoftherecentadvancementintheareaofwaterdemandofriverecosystemispresent2ed.Differentkindsofwaterdemandforecosystemareclassifiedaccordingtotheirbasicfunctionandtar2get.Methodsforcalculatingtheamountofvariouswaterdemandandtheirrelationshiparediscussed.Onthisbasis,principlesfordeterminingthereasonableamountofriverecosystemandcorrespondingthresh2oldareproposed.Itincludestheprinciplefordeterminingthefunctionofwaterdemand,dynamics,sub2section,harmonization,priority,maximizationofefficiency,minimizationofaftereffectandoptimizationforwholeriversection.

Keywords:river;waterdemand;ecosystem;functions;threshold;principle

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  本文關(guān)鍵詞：論河流生態(tài)環(huán)境需水，由筆耕文化傳播整理發(fā)布。