Page 97 - 《水资源与水工程学报》2025年第2期
P. 97
!36 "!2 # & ' ( ) & * + , - Vol.36No.2
2025 $ 4 % JournalofWaterResources&WaterEngineering Apr.,2025
DOI:10.11705/j.issn.1672-643X.2025.02.11
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Mainstreamsinuosityofverticalslotfishwaysaffectsgrasscarpupstreammigration
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SHIKai ,SUNShuangke ,LIUSongtao,LIGuangning,ZHENGTiegang,LIUHaitao
(1.SchoolofCivilEngineering,TianjinUniversity,Tianjin300072,China;2.ChinaInstituteofWater
ResourcesandHydropowerResearch,Beijing100871,China)
Abstract:Theverticalslotfishwayisawidelyadoptedfishpassagestructureinbothdomesticandinter
nationalcontexts ,renownedforitsefficientoperationwhichisfundamentallydependentonsuperiorhy
drauliccharacteristicswithinthepool.Inthisstudy,weinitiallyemployednumericalsimulationtech
niquestoanalyzeandoptimizethedesign.Guidedbytheprinciplethatthemainstreamshouldbecen
teredwithinthepoolwithsymmetricallydistributedbackflowareas ,weselectedthreedistinctlayoutcon
figurationsoftheverticalslotfishwaypool ,eachwithvaryingdegreesofmainstreamsinuosity.Then,a
physicalmodelwasconstructed,utilizinggrasscarp(Ctenopharyngodonidella)asthetargetspeciesfor
fishpassageexperiments.Comparativeanalyseswereconductedtoevaluatetheupstreammigrationper
formanceofgrasscarpacrossthethreelayoutconfigurations.Byintegratinghydraulicperformancemetrics
withtheobservedmigrationoutcomes ,wewereabletorecommendanoptimaldegreeofmainstreamsinu
osityfortheverticalslotfishwaypool.Thenumericalsimulationresultsrevealedthatasthedegreeofma
instreamsinuosityincreased ,thescopeofthemainstreamexpanded,themaximumattenuationofthema
instreamalongthepathwayincreased ,andthevelocitygradientacrosstheverticalslotcrosssectionin
tensified.Conversely ,boththemainstream velocityandtheverticalslotvelocitydecreased.From the
perspectiveofthetargetspecies ,theexperimentalresultsdemonstratedthatinCase Ⅱ,grasscarpexhib
itedaconcentratedupstreammigrationtrajectory,acontinuousmigrationprocess,reducedtailflickfre
quency ,shortermigrationtime,andahighersuccessrate.Therefore,CaseⅡ isrecommendedasthe
optimalpoolchamberlayoutinthisstudy.Thisresearchprimarilyexploresthreelayoutconfigurationsof
theverticalslotfishwaypoolwithvaryingdegreesofmainstreamsinuosityandidentifiestheoptimallay
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