Page 165 - 《水资源与水工程学报》2025年第2期
P. 165

!36 "!2 #                         & ' ( ) & * + , -                               Vol.36No.2
               2025 $ 4 %               JournalofWaterResources&WaterEngineering                 Apr.,2025

            DOI:10.11705/j.issn.1672-643X.2025.02.19


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                 FGHIJ:S274.1;S513   KLMNO:A    KPQJ:1672643X(2025)02016110
                  Optimizationofirrigationsystem basedongroundwaterlevelthreshold


                                                 BAIMengting,LIFawen
             (StateKeyLaboratoryofHydraulicEngineeringIntelligentConstructionandOperation,TianjinUniversity,Tianjin300072,China)
                 Abstract:SincethecommissioningoftheMiddleRouteoftheSouthtoNorthWaterDiversionProject,
                 thegroundwaterlevelintheNorthChinaPlainhasgraduallyrecovered.Theexistingirrigationsystemhas
                 notfullyconsideredtheimpactofgroundwateroncropgrowth,whichneedstobeinvestigated.Thispaper
                 usedAquaCropmodeltosimulatethegrowthprocessofsummermaizeinShijinIrrigationDistrict,and
                 exploredtheinfluenceofshallowgroundwaterdepths (setat0.5,1.0,1.5,1.8,2.0,2.5,3.0,3.5,
                4.0m)onsoilmoistureandcropyield.Subsequently,theoptimalthresholdofgroundwaterlevelwasde
                 terminedbythecouplingcoordinationmodel,andtheirrigationsystem wasoptimizedbythethreshold
                 regulationforthefirsttime.Theresultsshowthatashallowgroundwaterdepthof1.8-2.0mismost
                 suitableformaizegrowth.Whenthegroundwaterdepthislessthan2.0m ,thewaterrequiredformaize
                 growthisprimarilysuppliedbygroundwater ,eliminatingtheneedforadditionalirrigationandsavingap
                                       3
                                    6
                 proximately285.6×10 m wateracrosstheentiredistrict.Asforthegroundwaterdepthof2.0-4.0m,
                 irrigationisrequiredonceduringbothseedlingandjointingstagesindryyears,onlyonceduringthe
                                                                                               6
                                                                                                  3
                 seedlingstageinnormalyears ,andnotatallinwetyears,savingapproximately81.6×10 m water.
                 Theresultscanprovideatechnicalsupportforthesustainableutilizationofagriculturalwaterresourcesin
                 irrigationdistricts.
                 Keywords:groundwaterlevel;irrigationsystem;summermaize;AquaCropmodel;couplingcoordina
                 tionmodel ;ShijinIrrigationDistrict





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