Page 23 - 《水资源与水工程学报》2023年第3期
P. 23

!34 " ! 3 #                       & ' ( ) & * + , -                               Vol.34No.3
               2023 $ 6 %               JournalofWaterResources&WaterEngineering                 Jun.,2023

            DOI:10.11705/j.issn.1672-643X.2023.03.03


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                (1. ±zæ‡.8 !XQRWgj8\, ±z ,/ 330045;2. ˜U.8 NV28WZ[8\, ±& ˜U 225009)
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                 SWAP h‰©žÂiWªŸoé, ¼VÒíh‰hi³[)Gbãäü 0~100cmX*X(N˶RPNË5n
                 #…。%S”¿›Å: TµÇÈ, ³[)Ë£*X(N‰JK³üÃ+, N‰¶RŸË‰¶R¡#, X(ˉÜ
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                 çhiɽN‰¶R-'R‰¡ 52.5、60.6mm, ˉ¶R-'R‰¡ -4.5、-4.9mg/cm,0~100cmX*X
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                 (ˉ¶R‰±ó‹ 7.5、7.1mg/cm。³[)¦#Tµãäü 0~100cmX*X(qË, ÀڈGX(!GË
                 Ì÷ztu, ³[)GëɔÅS®K©ž .,Íˉè_éü{çÖ³[)zŠ\Gb。
                 >?@: X(N‰¶R; X(ˉ¶R;SWAP h‰; ³[); +bTa
                 ABCDE:S274;TV93   FGHIJ:A    FKLE:1672643X(2023)03001909
                     Simulationofsoilwater-saltfluxofsunflowerfarmlandinHetao
                                    IrrigationDistrictbasedonSWAPmodel


                                                          1
                                                                            2
                                            YUANChengfu,FENGShaoyuan
                      (1.SchoolofLandResourcesandEnvironment,JiangxiAgriculturalUniversity,Nanchang330045,China;
                         2.CollegeofHydraulicScienceandEngineering,YangzhouUniversity,Yangzhou225009,China)
                 Abstract:Inordertoexploresoilwater-saltdynamicinteractionsunderthecurrentconditionofwater
                 savingimplementationinHetaoIrrigationDistrict,thesoil-water-atmosphere-plant(SWAP)model
                 wascalibratedandvalidatedbasedonsunflowerfieldexperimentsdata,andthenwasappliedtothesimu
                 lationofsoilwater-saltfluxandwater-saltbalanceforthe0-100cmsoillayerwiththeplantationof
                 sunflowers.Theresultsshowedthatthewaterintherootlayerofthesunflowerfarmlandmainlyleaked
                 downwardinirrigationperiod ,thesoilwaterfluxandsaltfluxwerebothnegativeandthesoilsaltwas
                 leachedoutfromthissoillayer ;whereasinthenonirrigationperiod,groundwatersuppliedupwardfor
                 thewateruptakeoftheroots,sothesoilwaterfluxandsaltfluxwerebothpositiveandsaltaccumulated
                 inthissoillayer.Duringthetwoyearsimulationperiod ,theannualwaterfluxcumulantintherootlayer
                                                                                                   2
                 soilreached52.5and60.6mm ,theannualsaltfluxcumulantreached-4.5and-4.9mg/cm,and
                                                                     2
                 theannualtotalsoilsaltfluxincreasedby7.5and7.1mg/cm,respectivelyinthe0-100cmsoillay
                 er.Underthecurrentirrigationregime ,saltaccumulatesinthe0-100cmsoillayer,whichwouldin
                 turncausetherisksofsecondarysalinizationofsoil.So,itissuggestedthatanextrairrigationshouldbe
                 conductedattheendofsunflowergrowthperiodinautumninordertoleachoutthesoilsaltforthegrowth
                 ofthenextseasonofsunflowers.
                 Keywords:soilwaterflux;soilsaltflux;soil-water-atmosphere-plant(SWAP)model;sunflower;
                 HetaoIrrigationDistrict

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