太湖藻类水平漂移特征及其影响因素
- 海之魂
-
1 次阅读
-
0 次下载
-
2020-02-27 11:54:35
文档简介:
.,.LakeSci.(湖泊科学),2014,26(3):358-364http:#www.jlakes.org.E—mail:jlakes@niglas.ac.cn@2014byJournalofkSciences太湖藻类水平漂移特征及其影响因素邓建才,刘鑫,张洪梅,陈方。,徐彬,沈爱春(1:中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室,南京210008)(2:太湖流域管理局水文水资源监测中心,无锡214024)摘要:采用原位观测平台,研究分析了太湖竺山湾风速、湖流流速、波高以及藻类水平漂移特征及其影响因素,结果表明日间藻类水平漂移速率呈锯齿式交替特征,日内藻类水平漂移速率变化幅度大;藻类水平漂移速率与风速之间呈显著线性正相关;当0.02m<有效波高<0.Im时,藻类水平漂移速率与有效波高呈显著线性负相关,当有效波高>0.1m时,波浪会显著改变藻类运动方式,破坏藻类表层聚集形态;湖流对藻类水平漂移速率无显著性影响;藻类水平漂移方向受湖流流向和风向的共同作用;藻类水平漂移速率与风速、波高、湖流流速间关系可用多元线性方程表达,且拟合度良好,可为藻类水华预测模型构建提供依据.关键词:太湖;原位观测;漂移速率;影响因素;竺山湾CharacteristicsandimpactfactorsofalgalhorizontaldriftinginLakeTaihuDENGJiancai,LIUXin,ZHANGHongmei,CHENFang。,XUBin。&SHENAichun(1:StateKeyLaboratoryof妇ScienceandEnvironment,NanjingInstituteofGeographyandLimnology,ChineseAcademyofSciences,Nanjing210008,P.R.China)(2:TaihuHydrologyandResourcesSurveyBureau,Wuxi214024,P.R.China)Abstract:/n—situobservationplatformwasusedtoinvestigateimpactsofwindspeed,lakecurrentandsignificantwaveheight(SWH)OilalgalhorizontaldriftingvelocityinZhushanBay,LakeTaihu.Resultsshowedthatalgaldriftingrateondifferentobser—vationdayswasalternatingzigzagtypecharacteristics,andthentheamplitudeofalgaedriftingvelocitywithinonedaybecameobvi—ouslydifferent.Asignificantpositivelinearcorrelationbetweenalgaldriftingvelocityandwindspeedwasobserved.WhenSWHsarewithintherangeof0.02mand0.1m,therewasadramaticallynegativelinearcorrelationbetweenalgaldriftingrateandSWHs;whenSWHswerelargerthan0.1m,wavecouldmarkedlychangealgaedriftingpatternsanddestroyalgaetabletlayers.Lakecurrenthadinsignificantefectonthealgaldriftingrates,althoughthedirectionofalgaltransportwasregulatedbythedirec—tionsoflakecurentandwind.Therelationshipsbetweenalgaehorizontaldriftingratesandwindspeeds,SWHsandlakeflowmaybeexpressedbyamultiplelinearequationwiththegoodnessoffit,whichprovidedatheoreticalbasisfortheconstructionofalgalbloompredictionmode1.Keywords:LakeTaihu;in-situobservation;driftingvelocity;impactfactors;ZhushanBay大多数水华藻类具有伪空胞”,通过浮力调节作用,实现在水体垂向的移动.在静风或弱风条件下,藻类伪空胞的浮力调控使其进入水体
评论
发表评论