Page 97 - 《水资源与水工程学报》2022年第2期
P. 97
!33 " ! 2 # & ' ( ) & * + , - Vol.33No.2
2022 $ 4 % JournalofWaterResources&WaterEngineering Apr.,2022
DOI:10.11705/j.issn.1672-643X.2022.02.12
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HIAJK:TV213.4;X143 LMNOP:A LQRK:1672643X(2022)02009308
Effectsoflanduse,precipitationandtemperaturechangeonecologicalflow
LAIJingming,ZOUJin,ZHANGHongbo,YAOTongyue
(FacultyofElectricPowerEngineering,KunmingUniversityofScienceandTechnology,Kunming650504,China)
Abstract:Quantitativeresearchwasconductedtargetingattheimpactofprecipitation,temperatureand
landusechangeontheecologicalflow.Usingthesoil&waterassessmenttool (SWAT)modelandthe
improvedTennantmethod,theimpactsofprecipitation,temperatureandlanduseonthemonthlyecologi
calflowprocessinYunlongReservoirbasinwerequantitativelyanalyzed.Theresultsshowthatthearea
ofwaterandconstructionlandinYunlongReservoirbasinhasexpandedsignificantlyduringtheperiodof
2008-2018 ,resultingintheincreaseofthemonthlyaverageecologicalflowandthepeakecologicalflow
toacertainextent.Accordingtothecalculationresults,thegrowthrateofwaterareaandconstruction
landwas950% and100% respectively ,andtheaccumulativeannualecologicalflowincreasedby7.82
3
m /s.Theecologicalflowwascloselyrelatedtoprecipitationandtemperature,whichwaspositivelycor
relatedwithprecipitationandnegativelycorrelatedwiththeairtemperature.Comparedwiththetempera
ture ,precipitationhadagreaterimpactontheecologicalflow.Underthesameamplitude,theincreaseof
precipitationpresentedagreaterimpactonecologicalflowthanthedecrease ,whereasthedropoftemper
aturegavealargerimpactonecologicalflowthantherise.Ithasbeencalculatedthatwhentheprecipita
tionamplitudewas+10% and -10%,thecorrespondingchangesofecologicalflowwas+0.0617
3
3
m /sand-0.0570m /s,andwhenthetemperatureamplitudewas+1℃ and-1℃,thechangesof
3
3
ecologicalflowwas-0.0151m /sand +0.0193m /s,respectively.Inconclusion,precipitation,
temperatureandlandusechangehaveasignificantinfluenceontheecologicalflow.
Keywords:ecologicalflow;soil&waterassessmenttool(SWAT)model;improvedTennantmethod;
landuse;precipitation;temperature
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