Page 47 - 《水资源与水工程学报》2023年第5期
P. 47
! 34 " ! 5 # & ' ( ) & * + , - Vol.34No.5
2023 $ 10 % JournalofWaterResources&WaterEngineering Oct.,2023
DOI:10.11705/j.issn.1672-643X.2023.05.05
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EFGHI:P426.2 JK7LM:A JNOI:1672643X(2023)05004309
Temporalandspatialevolutioncharacteristicsofpotentialevapotranspiration
anditsinfluencingfactorsinJialingRiverBasin
1
1
1
1,2
3
1,2
1
ZHAOBinhua ,MAFangming,LIZhanbin,LIPeng ,HUANGJinhua,GAOBei,SUNHu
(1.StateKeyLaboratoryofEcohydraulicsinNorthwestAridRegionofChina,Xi’anUniversityofTechnology,Xi’an710048,China;
2.KeyLaboratoryofNationalForestryandGrasslandAdministrationonEcologicalHydrologyandDisasterPreventioninArid
Regions,Xi’an710048,China;3.Xi’anWaterConservancyPlanningSurveyandDesignInstitute,Xi’an710054,China)
Abstract:Inordertostudythespatiotemporalpatternofpotentialevapotranspiration(ET)inJialing
0
RiverBasin(JRB)andtheinfluenceofchangingclimateconditionsonpotentialET inthebasin,the
0
dailymeteorologicaldatafrom1970to2019werecollectedfrom45nationalmeteorologicalstationsinJRB
forthecalculationof ET.Thespatiotemporalvariationcharacteristicswereanalyzedbylineartrendrate,
0
Mann-Kendalltrendtestandinversedistanceweighted(IDW)interpolation.Thesensitivityanalysis
andcontributionratewereusedtoquantifytheleadingfactorsinfluencingthechangeofET,andthein
0
teractionsbetweentheinfluencingfactorswereanalyzedbythegeographicdetector.Theresultsshowthat
attheannualscale ,themeanairtemperatureintheJRBincreasedattherateof0.20℃/10a,whilethe
relativehumidity,averagewindspeedandsunshinedurationdecreasedattheratesof0.239%/10a,
-1
-1
0.048(m·s )/10aand0.10(h·d )/10a,respectively.Moreover,theannualET decreasedat
0
therateof0.133mm/10a,whichincreasedinspringandwinter,butdecreasedinsummerandautumn.
Spatially ,annualET washigherinthenorthbutlowerinthesouth.Inconclusion,theleadingfactorof
0
annual ETchangewasmeanairtemperature;however,thechangeofETinJRBwastheresultofthein
0
0
teractionsofmultiplefactors,andtheexplanatorypoweroftheinteractionbetweenmeanairtemperature
andrelativehumidityreached68.4%.Theresultscanhelpunderstandthedeepanalysisofecological
andhydrologicalprocessesinthestudyarea.
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