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
DEMå±YfGÓð SWAT 3¥$êÅUMN
———¬®=¯°
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Qgh , i j 1,2,3 , Hkl , mno , $ p , Bqr 1,3
(1. P_ªz*k# `aª«CHISÎ\efghi, ZP 712100;2. P_ªz*k# ´%VWXW
`@ª«./efghi, ZP 712100;3. P_ªz*k# CdW^HI#$, ZP 712100)
@ A:DEMN@d¹|ªÃ·qPQC5|ÀÖ»。 ÞµÔÕy, Þß\/µ、 /ßN)/
O 3 C5Òay¶Ò, ¦d¹ 9 ×¾~¦ÎÀ| DEMN@d¹ªÃ( ¦ÎÀÚØy 30~3000m) ^
100 SWAT , J:ªÃ·qC9ÀÖ»|PQ, ø¹ TOPSIS jÅ®¯ôàxy。
+J¼½:DEM¦ÎÀBPQÔÕ|Nµiß, ËÔÕ°±rsB¦ÎÀ|¿À*æbàM; ' DEM¦
ÎÀÀ 1000m, ïb¹ SWAT ·| Burnin HW, )$ÇÔÕWµi|Íß;HRU|ª6 DEM
¦ÎÀ|r¿*âz, *@d¹¦ÎÀ HRUª6|PQ¾Ðn; '¦ÎÀdKk,DEMݪ¾¿S$
Ç|PQ@k@d¹; ³^|\/µ、 /ßN)/O 3 Òf|·,DEMN@d¹¦ÎÀ|Ë×
à¦y 750 N 300m、30 N 90m « 150 N 3000m。È+JÅyÔÕC9^WÀ·q×
WÝ}。
BCD:DEM; @d¹¦ÎÀ;SWAT ; C9ÀÖ»;TOPSIS; ÞµÔÕ
EFGHI:P333;TV11 JK7LM:A JNOI:1672643X(2023)05007010
ImpactofDEM andlandcoverresolutiononthesimulationofrunoffand
sedimentinSWATModel : AcasestudyofJingheRiverBasin
1,2,3
1,3
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1,3
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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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