Page 76 - 《水资源与水工程学报》2022年第5期
P. 76
! 33 " ! 5 # & ' ( ) & * + , - Vol.33No.5
2022 $ 10 % JournalofWaterResources&WaterEngineering Oct.,2022
DOI:10.11705/j.issn.1672-643X.2022.05.09
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HIJKL:TV697;TV11 MNOPQ:A MRSL:1672643X(2022)05007209
Comprehensiveeffectofgrouphydrologicalprojectsoncharacteristic
waterlevelofChenglingjiinDongtingLake
1
1
1
1
1,2
1
ZHONGXiaomin ,SHUAIHong,LIJingbao,LIYulian,WANGYuxin,ZHANGJingyi
(1.SchoolofGeographicalSciences,HunanNormalUniversity,Changsha410081,China;2.HunanKeyLaboratoryof
GeospatialBigDataMiningandApplication ,HunanNormalUniversity,Changsha410081,China)
Abstract:TemporalevolutioncharacteristicsofcharacteristicwaterlevelofChenglingjiundertheeffectof
grouphydrologicalprojectswereanalyzedbasedonthemonitoredhydrologicaldataofChenglingjiStationin
DongtingLakefrom1956to2020usingMann-Kendalltest.Theresultsshowedthattheannualcharacter
isticwaterlevelofChenglingjishowedasignificantupwardtrend(P <0.05).Comparedwiththefirst
stage ,theannualaveragewaterlevelofthesecond,thirdandfourthstageincreasedby0.68,1.04and
1.61m ,respectively,theannualhighestwaterlevelincreasedby0.35,1.14and1.78m,respectively;
whiletheannualaveragewaterlevelandtheannualhighestwaterleveldecreasedto20.87and30.50m,
respectivelyatthefifthstage,andtheannuallowestwaterlevelincreasedbystages(18.09,18.84,
19.32,20.26,and20.87m).TherewerefourhydrologicalseasonsinChenglingjiwaterlevel,whichwere
waterrisingseason ,wetseason,waterfallingseasonanddryseason.Thehighestwaterlevelinwaterrising
seasonincreasedbymorethan2m ;theaveragewaterlevelandthehighestwaterlevelinwetseasonfell
backto28.69and30.42matthefifthstageafterincreasedatthefirstfourstages ;theaveragewaterlevel
andthehighestwaterlevelfluctuatedinwaterfallingseason,andthelowestwaterlevelgraduallydecreased
atthelastfourstages ;indryseason,theaveragewaterlevelandthelowestwaterlevelincreasedgradually,
andthecharacteristicwaterlevelatthefifthstageincreasedbymorethan2m.Theeffectofgrouphydrolog
icalprojectsonthecharacteristicwaterlevelofChenglingjipresenteddifferentstatesineachtypicalyear.
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