简介：Thepapermainlyfocusesondescribingthemodificationmadetoanewdepth-averagedtwo-equationturbulentclosuremodelbasedontherevisedκ-ωmodelrecently.Inthecaseofsidedischargedjetswithtempera-turedifferenceandtransversecurrent,thenewmodelhasbeeninvestigatednumericallyindetail.Asapracticalexampleofapplicationtousethenewmodel,thesidedischargeofthecoolingwaterfromthreeoutletsintoanatu-ralriverononebankhasbeensimulated,andthegeomorphicvariationunderwaterhasbeentreatedsuitably.Twodepth-averagedmodels,andhavebeenused,thelaterwastheuniqueoneuptothepresent.Emphasisisplacedonthecomparativeresearchwithdifferentmodelsunderthesamecomputationalconditions.Ithasbeenverifiedthatifthedischargedflowratesarerelativelysmall,whenthepollutantplumeinthenearandtransitionalzonsispredicted,theagreementwithexperimentalandfielddatasimulatedbythemodelisbetterthanbythemodelorothermethodscommonlyusedinengineering.