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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               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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