Page 69 - 《水资源与水工程学报》2022年第3期
P. 69
!33 " ! 3 # & ' ( ) & * + , - Vol.33No.3
2022 $ 6 % JournalofWaterResources&WaterEngineering Jun.,2022
DOI:10.11705/j.issn.1672-643X.2022.03.09
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8IBJK:TV213 LMNOP:A LQRK:1672643X(2022)03006507
Evaluationandspatiotemporaldifferenceanalysisofwateruse
efficiencyinthemiddlereachesoftheYangtzeRiver
KUANGJiali,TANGDeshan
(CollegeofWaterConservancyandHydropowerEngineering,HohaiUniversity,Nanjing210098,China)
Abstract:Inordertoscientificallyevaluatethewateruseefficiency(WUE)inthemiddlereachesofthe
YangtzeRiver,13evaluationindexeswereselectedfromthefivedimensionsofcomprehensive,industri
al ,agricultural,domesticandecologicalwaterusetoconstructtheWUEevaluationmodelbasedon
MCW -greyTOPSIS.Theweightofeachindexwascalculatedbythemixedcrossweighting(MCW)
methodofG1method,entropyweightmethodandcoefficientofvariationmethod.TOPSISmethodand
greyrelationaldegreeanalysiswerecombinedtoevaluatetheWUEofthethreeprovincesinthemiddle
reachesoftheYangtzeRiverfrom2015to2019 ,andthespatiotemporaldifferencesofWUEinthethree
regionswereanalyzedfromthefivedimensionsmentionedabove.Resultsshowthattheefficiencyofre
gionalWUElevelinthemiddlereachesofYangtzeriverpresentedasteadyupwardtrendintimeseries ;
theWUEofHunanProvinceandHubeiProvincewerehigherduringtheevaluationperiodonspacese
quence ,whereasthatofJiangxiprovincewaslower;furthermore,therelativeclosenessofthethreere
gionsdifferentiatedgreatlyinallthefivedimensions.Accordingtotheanalysis ,themainproblemsofwa
teruseinthemiddlereachesoftheYangtzeRiverarerevealed ,whichcanprovideatheoreticalbasisfor
theresearchofregionalwateruseefficiencyandapplicationofwatersavingmeasures.
Keywords:wateruseefficiency;mixedcrossweighting(MCW);greyTOPSISmodel;spatiotemporal
differenceanalysis ;themiddlereachesofYangtzeRiver
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