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:1672643X(2023)03005509
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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