Page 14 - 《水资源与水工程学报》2024年第6期
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! 35 " ! 6 #                      & ' ( ) & * + , -                               Vol.35No.6
               2024 $ 12 %              JournalofWaterResources&WaterEngineering                 Dec.,2024

            DOI:10.11705/j.issn.1672-643X.2024.06.02


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                 3IJKL:P426.616   MNOPQ:A    MRSL:1672643X(2024)06001013

                           Evolutionofriverecologicaldroughtinthemiddleand
                                        lowerreachesoftheYellowRiver

                              HUANGChunyan,MAZhuangzhuang,LIYanling,MEIXiaolong
              (SchoolofMathematicsandStatistics,NorthChinaUniversityofWaterResourcesandElectricPower,Zhengzhou450046,China)

                 Abstract:RiverecologicaldroughtsinthemiddleandlowerreachesoftheYellowRiverarebecomingin
                 creasinglysevere,posingsignificantchallengestowaterresourcesmanagementandecologicalprotection
                 intheregion.Toassesstheriverecologicaldroughtconditions ,thisstudycalculatestheecologicalwater
                 demandatsixhydrologicalstationsintheresearchareausingtheTennantmethod,Q method,minimum
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                 monthlyaverageflowmethod,andannualdistributionmethod.Additionally,thestandardizedrivereco
                 logicaldroughtindex (REDI)isconstructedtoevaluatetheecologicaldroughtstatusoftherivers.Fur
                 thermore ,thestudyemploysKendalltrendanalysis,M-Kabruptchangetest,andMorletwaveletanaly
                 sistoinvestigatetheevolutioncharacteristicsofdroughtacrossmultipletimescalesinthewatershed.The
                 resultsindicatethatthedegreeofecologicaldroughtatvarioushydrologicalstationsgenerallyshowsasig
                 nificantintensifyingtrendontheannualscale ,sodoesthatontheseasonalscale,exceptforafewsea
                 sonsindifferentstations.Theyearsofdroughtabruptchangeontheannualscalemainlydistributeinthe
                1970sand1980s ,whilethoseontheseasonalscalevarybystations.Thereisasignificantdifferencein
                 thefirstprincipalperiodoftheriverecologicaldroughtindexbetweenannualandseasonalscales.
                 Keywords:ecologicaldrought;riverecology;ecologicalwaterdemand;droughtindex;droughtevolu
                 tionanalysis ;themiddleandlowerreachesoftheYellowRiver

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