Page 86 - 《水资源与水工程学报》2023年第2期
P. 86

8 2                      & ' ( ) & * + , -                 2023 $

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                30.16-156.20m /s;thetributariesinthesectionfromShangquantoAnningduare0.64-11.93m /
                                                                                              3
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                 sand3.50-124.61m /s;thetributariesinthesectionbelowAnningduare5.67-7.76m /sand14.
                            3
                77-30.53m /s,respectively.Theecologicalwaterdemandthresholdsoftheriversaregradedas“fair
                 -best ”and“verygood-best”duringthedryandwetperiodsoftheyear,respectively;theirsatisfac
                 tionlevelsoftheyearwerelessthan67% fortheZuliandMalianRivers,andlessthan50% fortheDa
                 tongandZhuanglangRiversduringthewetperiodsoftheyear.Theresultsofthestudyisconduciveto
                 themanagementofecologicalwaterdemandoftheriversandcanprovideatechnicalsupportforthewater
                 conservationandoptimalallocationofwaterresourcesintheupperreachesoftheYellowRiver.
                 Keywords:ecologicalwaterdemandthreshold;basicecologicalflow;targetecologicalflow;dynamice
                 valuation;GansusectionoftheYellowRiverBasin
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