Page 22 - 《水资源与水工程学报》2022年第2期
P. 22
!33 " ! 2 # & ' ( ) & * + , - Vol.33No.2
2022 $ 4 % JournalofWaterResources&WaterEngineering Apr.,2022
DOI:10.11705/j.issn.1672-643X.2022.02.03
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HIAJK:TV213.4 LMNOP:A LQRK:1672643X(2022)02001809
Temporalandspatialvariationcharacteristicsofblueandgreenwater
resourcesinJialingRiverBasinbasedonSWATmodel
YANGHao,NIFuquan,DENGYu,SHENJingxiong
(CollegeofWaterConservancyandHydropowerEngineering,SichuanAgricultureUniversity,Ya’an625014,China)
Abstract:TheJialingRiverBasinisanimportantwatersourceareafortheChengduandChongqingeco
nomiccircle,andthestatuschangeofitswaterresourceshasasignificantimpactontherealizationof
newdevelopmentpatterninChina.Here,thehydrologicprocessofJialingjiangRiverBasinwassimula
tedbasedonSWAT(soilandwaterassessmenttool)modeltoexplorethetemporalandspatialdistribu
tionfeaturesofblueandgreenwaterinthisareainsometypicalyearsandduringtheperiodof1981-
2020 ,andthenMann-Kendall(M-K)testwasusedtoanalyzetheinterannualvariationtrendofblue
andgreenwater.Theresultsshowedthattheaverageannualprecipitationinthebasinwas931mm ,
whichwasthesumofthequantityofblueandgreenwaterresources;theannualaverageofthequantityof
bluewaterresourceswas386mm ,accountingfor41.5% oftheprecipitation,andthatofgreenwaterre
sourceswas545mm ,accountingfor58.5% oftheprecipitation.Asawhole,precipitationandgreenwa
terresourcespresentedanupwardtrendintheperiodof1981-2020 ;whereasbluewaterresources
showedadownwardtrend.Bluewaterresourceswas165.61 ,456.71and643.70mminverylow,nor
malandveryhighflowyears,respectively,andgreenwatercoefficientvariedgreatlyinthetypicalyears.
Thespatialdistributioncharacteristicsofbluewaterresources ,greenwaterresourcesandprecipitation
withinthebasinweresimilar,showingaspatialpatternoffirstdecreasingandthenincreasingfromthe
upstreamtothedownstream ,andlessinthewestbutmoreintheeast.
Keywords:blueandgreenwaterresources;temporalandspatialdistribution;soilandwaterassessment
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