Page 49 - 《水资源与水工程学报》2022年第2期
P. 49
!33 " ! 2 # & ' ( ) & * + , - Vol.33No.2
2022 $ 4 % JournalofWaterResources&WaterEngineering Apr.,2022
DOI:10.11705/j.issn.1672-643X.2022.02.06
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HIAJK:TV213;P333 LMNOP:A LQRK:1672643X(2022)02004509
AnalysisonecologicalflowinthemiddlereachesofFenRiver
LIMengyao,FUXingtao
(CollegeofHydroScienceandEngineering,TaiyuanUniversityofTechnology,Taiyuan030024,China)
Abstract:Inviewofthedestructionofecologicalenvironmentandshortageofecologicalflowinthemid
dlereachesofFenRiver,weselectedLancunsectionandZhaochengsectionasthetypicalresearchob
jectstoanalyzetheecologicalflowusingsixhydrologicalandhydraulicmethods,andthentherationality
andguaranteerateofthecalculationresultswerediscussed.Theresultsshowthattheecologicalflowof
thetwosectionshadthesamevariationpattern,whichwaslowinJanuary,FebruaryandDecember,but
highinMarch ,andhigherinfloodseasonthanthatinnonfloodseasononthewhole.Theinterannual
guaranteerateofthetwosectionswasgenerallyhighbefore1996 ,butdecreasedfrom1997to2008,and
increasedwithfluctuationsafter2008.Theguaranteeratefluctuatedwithintheyear ,buttheguarantee
rateofLancunsectionwashighinMarch,whilethatofZhaochengsectionwasverylow.Therefore,the
influenceofwateruseoftheirrigatedareasandstorageofreservoirsonthedownstreamriverecosystem
shouldbeconsidered.Bycomparingtheresultsofthesixmethods ,itisconcludedthatthemonthlyfre
quencymethodisnotsuitablefortheFenRiverBasin ;therecommendedmethodforthecalculationofec
ologicalflowisTennantmethodforJanuary,FebruaryandDecember,theQ methodforthegeneralwater
p
useperiod,andthedynamicmethodforthefloodseason;inMarch,thewettedperimetermethodisrec
ommendedforLancunsectionbutTennantmethodforZhaochengsection.Therecommendedmonthlyec
ologicalflowprocesscanreflectthechangeofhighandlowflowindifferentwaterperiodsoftheyearand
provideatheoreticalbasisfortheecologicalrestorationintheFenRiverBasin.
Keywords:ecologicalflow;hydrologicalmethod;hydraulicmethod;guaranteerate;themiddlereaches
ofFenRiver
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