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Optimizationstudyofdrought - limitedwaterlevelandwatersupplystrategyofthe
reservoirintheirrigationdistrictbasedonfuzzysetpairanalysismethod
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ZHANGLibing ,BAIYachao,JINJuliang ,YUHaiguan,
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ZHOUYuliang ,ZHOUTing
(1.CollegeofCivilEngineering,HefeiUniversityofTechnology,Hefei 230009,China;
2.InstituteofWaterResourcesandEnvironmentalSystemEngineering,HefeiUniversityofTechnology,Hefei 230009,China;
3.SchoolofEngineering,AnhuiAgriculturalUniversity,Hefei 230036,China)
Abstract:Withsocioeconomicdevelopmentandclimaticchange,regionaldroughtproblemsareincreasinglyseri
ousandtheroleofreservoirsindroughtresistancebecomesmoreandmoreprominent.Theproposalandapplication
ofdrought - limitedwaterlevelisofgreatsignificanceforbringingintoplaytheregulationroleoflargeandmedium -
sizedreservoirsindroughtresistanceandalleviatingthedroughtsituationinthebasin.Aimingatthepresentstudy
stateofdrought - limitedwaterlevel ,MeishanReservoirintheShiheIrrigationDistrictwastakenasanexamplein
thispaper.Firstly ,theinitialstageddrought - limitedwaterlevelwascalculatedbasedonurbanwatersupply,
agriculturalirrigation,hydroelectricpowergeneration,ecologicalenvironmentandotherfactors.Thenthefuzzyset
pairanalysismethodwasusedtoconstructthecomprehensiveevaluationmodelofwaterresourcesystem operation
effectofreservoirandirrigationdistrict.Afterthat ,withpurposeoftheoptimizationofcomprehensiveoperationof
waterresourcessystem,theimmunegeneticalgorithm wasusedtooptimizetheoptimizationvariablesofthe
drought - limitedwaterlevelandirrigationwatersupplylimitmeasures (basedonthecharacteristicsofreservoir
waterinflowandcropgrowthcharacteristics).Finally,thecomprehensiveoperationeffectofreservoirwaterre
sourcessystem withorwithoutdroughtlimitwaterlevelwascompared ,andthechangeofreservoirwatersupply
andtheriskofcroplossinirrigateddistrictunderdifferentcontrolmethodswereanalyzed.Thisstudyshowthat
comparedwiththedroughtlimitwaterlevelwitheconomicbenefitasthesinglegoal,theoptimizeddroughtlimit
waterlevelinthisstudyhasgreatlyimprovedinmanyindicators ,includingtheamountofreservoirfillingand
pondfillingincreasedby5.55millioncubicmetres,theamountofabandonedwaterdecreasedby5.66million
cubicmetres,thewatersupplyofponddam increasedby2.53millioncubicmetres,theeconomicbenefitin
creasedby460,000yuan,thecropyieldreductiondecreasedby3.32% andtheriskofcroplossduetodrought
wasreducedby3.15%.Itcanbeseenthattheapplicationofsystematiccomprehensiveevaluationdecisionis
beneficialtoimprovethecomprehensiveoperationeffectofthereservoirirrigationdistrictsystem ,andtheutiliza
tionefficiencyofwaterresourcesandtheeconomicbenefitofthereservoirarealsoimproved.Comparedwithem
piricalcontrol,theoptimalwatersupplystrategyadaptedtoreservoirinflowandcropgrowthcharacteristicsunder
droughtlimitwaterlevelcaneffectivelyreducetheyieldreductionrateofmiddlericeinirrigatedareasandprovide
strongsupportforthesmoothimplementationofdroughtlimitwaterlevelandagriculturalirrigationindroughtperiod.
Keywords:large - scalereservoirsandirrigationareas;drought - limitedwaterlevel;simulationandoptimization;
fuzzysetpairanalysismethod;croplossrisk
(责任编辑:耿庆斋)
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