Page 27 - 2023年第54卷第9期
P. 27
2021,4(3):1 - 9.
[15] 李程喜,段文刚,卢明龙,等.南水北调中线冰情演变水温与气温阈值研究[J].水利科学与寒区工程,
2022,5(2):4 - 8.
[16] 温世亿,杨金波,段文刚,等.南水北调中线 2014 - 2015年 度 冬 季 冰 情 原 型 观 测 [J].人 民 长 江,2015,
46(22):99 - 102.
[17] 黄国兵,杨金波,段文刚,等.典型长距离调水工程冬季冰凌危害调查及分析[J].南水北调与水利科技,
2019,17(1):144 - 149.
[18] 段文刚,黄国兵,杨金波,等.长距离调水明渠冬季输水冰情分析与安全调度[J].南水北调与水利科技,
2016,14(6):96 - 104.
[19] 段文刚,郝泽嘉.基于气 温 链 的 南 水 北 调 中 线 工 程 冬 季 气 温 等 级 评 价 [J].长 江 科 学 院 院 报,2022,39
(9):1 - 8.
Observationandanalysisofwatertemperatureandicecoverinthemiddlerouteof
South - to - NorthWaterDiversionProjectin2014 - 2022winter
1
1
2
1
1
DUANWengang,HAOZejia,YANGJinbo,HUANGMinghai,LIUBei,XINGMengyuan 1
(1.ChangjiangRiverScientificResearchInstitute,Wuhan 430010,China;
2.ChinaSouth - to - NorthWaterTransferGroupMiddleLineCo.,Ltd.,Beijing 100038,China)
Abstract:ThemiddlerouteofSouth - to - NorthWaterDiversionProjecthasbeeninoperationfor8winterssinceits
fulloperationinDecember2014 ,andthewaterconveyanceflowiscontrolledto30%- 50% ofthedesignflowdur
ingtheiceperiodinordertopreventtheicejamdisaster ,whichseriouslyrestrictsthewaterconveyancebenefitsof
theproject.Therefore ,thechannelwatertemperatureandicecoverhavebeenoneofthekeyissuesinwinterwater
conveyance.Fieldmeasurementdatashowsthat ①Winterwaterconveyanceflowgenerallyincreasedyearbyyear,
3
andtheendcanalsectionremainedrelativelystable,theflowrateofGangtousluicewasabout50m ?s,thatof
3
Beijumahesluicewasabout25m ?s;②Wintertemperatureshavegenerallybeenmostlywarm.Theminimumtem
peratureatBaodingstationwas - 22.0℃,andthe3dmovingtemperaturepolewas - 10.7℃.Ashort - termstrong
coldsnapmaybeacommonpatternforfutureicecovergeneration ;③Inwinter,thewatertemperaturedecreases
graduallyalongtherange ,withthelowestwatertemperatureattheheadofthedrainTaochasluicebeing6.7℃,
andattheendofthecanalBeijumahesluicefallingtoaround0℃ inmostyears.Themaximumdropofwatertem
peratureintheBeijumahesluicewasfrom3.5℃ to0℃ in10d ,andinthecanalsectionreached1.7℃?100km
duringtheperiod ;④Thelongesticecoverwas280kminwinter2016,followedby73kminwinter2015and38
kminwinter2021,andnoicecoverwasgeneratedinwinter2020and2022.Nearly90km ofGangtousluiceto
Beijumahesluicesisthesectionwithfrequenticecover ,whichshouldbeaconcern.Basedonthemeasureddata
beforeicecovergeneration ,theinitialwatertemperatureandintervalairtemperaturemodelisusedtofitthecon
cisewatertemperaturepredictionmodelandthecriticalthresholdoficecoverformationwithdifferentforecasttime
linessof2d ,3dand7d.Thepreliminaryanalysisconcludesthat:wintertemperatureandwaterflowarethetwo
maindriversoficecovergeneration ,thelowertheflowthelowerthetemperaturetheeasieritistogenerateicecov
er ,andtheshort - termstrongcoldwaveinJanuaryismoreconducivetoicecovergeneration.Thesevereiceregime
inwinter2016wastheresultofacombinationoftwofactors;thewinter2015icecoverwasmainlyinducedbylow
waterdeliveryflows ,whilethewinter2021icecoverismainlyduetoashort - termstrongcoldsnap.
Keywords:MiddleRouteofSouth - to - NorthWaterDiversionProject;winterwatertemperature;icecover;
strongcoldwave;icecoverformationthreshold
(责任编辑:李福田)
0
— 1 3 7 —