Page 59 - 《水资源与水工程学报》2023年第3期
P. 59

!34 " ! 3 #                       & ' ( ) & * + , -                               Vol.34No.3
               2023 $ 6 %               JournalofWaterResources&WaterEngineering                 Jun.,2023

            DOI:10.11705/j.issn.1672-643X.2023.03.07


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                 ABCDE:TV121   FGHIJ:A    FKLE:1672643X(2023)03005509
              Correspondingchangesofwaterresourcesandrunoffgenerationmechanism
                            in“ChinaWaterTower”underchangingenvironment


                                                          1
                                                 1
                                                                                     2
                                                                        1
                                    SUNYongshou,LIYan,YANGFang,LIUYihua
                         (1.HydrologicalandWaterResourcesForecastCenterofQinghaiProvince,Xining810001,China;
                                          2.QinghaiClimateCenter,Xining810001,China)
                 Abstract:Undertheimpactofglobalwarming,ChinaWaterTowerisundergoingwarmingandwetting
                 dominatedclimatechange.Affectedbytheinfluenceofclimateandunderlyingsurfaceconditions,the
                 waterresourcesincreasedsignificantlyinthisarea,andtherunoffmechanism showedobviousregional
                 differences.BasedonthedataofhydrometeorologicalelementsinChinaWaterTowerfrom1956to2020 ,
                 weanalyzedthehydrologicalelements,thechangeandtrendcharacteristicsofrunoffcapacity,aswellas
                 themutualinfluencingmechanismamongthem ,usingtrend,abruptchangeandanomalyanalysismeth
                 ods.Theresultsshowthatduringthestudyperiod ,theairtemperatureandevaporationcapacityhaveall
                 increased,resultinginasignificantincreaseinprecipitationandrunoff,whichindicatesthatthestudyar
                 eahasenteredthewetseason.Atthesameprecipitationandrunoffscale ,therunoffcapacitydecreased
                 inthesourceareaoftheYellowRiver ,butincreasedinthatoftheYangtzeRiverandLancangRiver.
                 Theincreasedtemperature ,continuouslyabundantrainfall,initialrainfallincreaseofthebasin,in
                 creasedrunoffindryseasonandenhancedecologicalwaterholdingcapacityoftheunderlyingsurfaceare
                 themainreasonsforthechangeofrunoffcapacityandtheincreaseofwaterresourcesinChinaWater
                 Towerarea.
                 Keywords:waterresources;environmentalchange;runoffgenerationmechanism;hydrometeorological
                 element ;ChinaWaterTower



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