摘要
Theartificialecologicalfloatingbediswidelyusedinriversandlakestorepairandpurifypollutedwater.However,thewaterflowpatternandthewaterleveldistributionaresignificantlychangedbythefloatingbeds,andtheinfluenceonthewaterflowisdifferentfromthatofaquaticplants.Inthispaper,basedonthecontinuousporousmediamodel,amoveabletwo-layercombinationmodelisbuilttodescribethefloatingbed.Theinfluencesofthefloatingbedsonthewaterflowcharacteristicsarestudiedbynumericalsimulationsandexperimentsusinganexperimentalwaterchannel.Thevariationsofthewaterleveldistributionarediscussedunderconditionsofdifferentflowvelocities(v=0.1m/s,0.2m/s,0.30m/s,0.4m/s),floatingbedcoveragerates(20%,40%,60%)andarrangementpositionsawayfromthechannelwall(D=0m,0.1m,0.2m).Theresultsindicatethattheflowvelocityincreasesunderthefloatingbeds,andthewaterlevelrisessignificantlyunderhighflowvelocityconditionsintheupstreamregionandthefloatingbedregion.Inaddition,theaveragerisingwaterlevelvalue(ARWLV)increasessignificantlywiththeincreaseofthefloatingbedcoveragerate,andthearrangementpositionoffloatingbedsintherivercanalsogreatlyinfluencethewaterleveldistributionunderahigh-flowvelocitycondition(v?0.2m/s).
出版日期
2014年03月13日（中国期刊网平台首次上网日期，不代表论文的发表时间）
