Page 74 - 《水资源与水工程学报》2023年第5期
P. 74

! 34 " ! 5 #                      & ' ( ) & * + , -                               Vol.34No.5
               2023 $ 10 %              JournalofWaterResources&WaterEngineering                 Oct.,2023

            DOI:10.11705/j.issn.1672-643X.2023.05.08


            DEM呱YfGÓð SWAT 3¥$êžÅUMN

                                              ———¬­®=¯°


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                            Qgh , i j        1,2,3 , Hkl , mno , $ p , Bqr                 1,3
            (1. P_ªz*Œk# `aª«CHISÎ\efghi, ZP ™ 712100;2. P_ªz*Œk# ´%‹VWXW
                  `@ª«./efghi, ZP ™ 712100;3. P_ªz*Œk# CdW^HI#$, ZP ™ 712100)
                 @ A:DEMN@d¹|ªÃ·qPQC5‘|ÀÖ»。 ÞµÔÕy­˜, Þß\/µ、 ™/ßN)/
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                  100 ˆ SWAT ‘, ‰J:ŸªÃ·q­C9ÀÖ»|PQ, Šø¹ TOPSIS jŜ­‘®¯ôàxy。
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                 WŒÝ}。
                 BCD:DEM; @d¹¦ÎÀ;SWAT ‘; C9ÀÖ»;TOPSIS; ÞµÔÕ
                 EFGHI:P333;TV11   JK7LM:A    JNOI:1672643X(2023)05007010

                ImpactofDEM andlandcoverresolutiononthesimulationofrunoffand
                           sedimentinSWATModel : AcasestudyofJingheRiverBasin

                                        1,2,3
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                     LIRuizhi ,WULei ,DUBailin ,GUOZongjun ,WANGYan ,XULiujia
                    (1.KeyLaboratoryofAgriculturalSoilandWaterEngineeringinAridandSemiaridAreas,MinistryofEducation,
                       NorthwestA&FUniversity,Yangling712100,China;2.StateKeyLaboratoryofSoilErosionandDryland
                       FarmingontheLoessPlateau ,NorthwestA&FUniversity,Yangling712100,China;3.CollegeofWater
                          ResourcesandArchitecturalEngineering,NorthwestA&FUniversity,Yangling712100,China)
                 Abstract:ThedataaccuracyoftheDEMandlandcoveraffectsthesimulationperformanceofhydrologi
                 calmodels.Inthisstudy ,threehydrologicalstations,i.e.Maojiahe,YangjiapingandZhangjiashan,
                 wereselectedasthecontrolsitestoinvestigatetheinfluenceoftheaccuracyoftheinputdataonthesimu
                 lationeffectofrunoffandsediment.100SWATmodelswereconstructedusingninedifferentresolutionsof
                 DEM (30-3000m)andlandcoverdata(30-3000m)andtheTOPSISmethodwasusedtoevaluate
                 themodel ’sperformanceinacomprehensivemanner.TheresultsshowsthattheDEM resolutionaffects
                 theextractionofwatershedboundaryandrivernetwork ,andthewatershedfeatureinformationwillbelost
                 withthedecreaseofresolution ;whentheDEMresolutionislowerthan1000m,the“Burnin”toolin
                 SWATneedstobeusedtocompletetheaccurateextractionofwatershedboundaryandrivernetwork ;the
                 numberofHRUdecreaseswiththedecreaseofDEMresolution,whereastheinfluenceoflandcoverreso
                 lutiononthenumberofHRUisnotsignificant ;DEM causesagreaterimpactonparametersensitivity
                 thanlandcoverwhenthereisalargechangeinresolution;theoptimalresolutioncombinationsofDEM
                 andlandcoverforthethreemodelsofMaojiahe,YangjiapingandZhangjiashanare750mand300m,30

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