資源描述:
《太湖藻類水平漂移特征及其影響因素-論文.pdf》由會員上傳分享,免費在線閱讀,更多相關(guān)內(nèi)容在應(yīng)用文檔-天天文庫。
1、.,.LakeSci.(湖泊科學(xué)),2014,26(3):358-364http:#www.jlakes.org.E—mail:jlakes@niglas.a(chǎn)c.cn@2014byJournalofkSciences太湖藻類水平漂移特征及其影響因素鄧建才,劉鑫,張洪梅,陳方。,徐彬,沈愛春(1:中國科學(xué)院南京地理與湖泊研究所湖泊與環(huán)境國家重點實驗室,南京210008)(2:太湖流域管理局水文水資源監(jiān)測中心,無錫214024)摘要:采用原位觀測平臺,研究分析了太湖竺山灣風(fēng)速、湖流流速、波高以及藻類水平漂移特征及其影響因素,結(jié)果表明日間藻類水平漂移速
2、率呈鋸齒式交替特征,日內(nèi)藻類水平漂移速率變化幅度大;藻類水平漂移速率與風(fēng)速之間呈顯著線性正相關(guān);當(dāng)0.02m<有效波高<0.Im時,藻類水平漂移速率與有效波高呈顯著線性負(fù)相關(guān),當(dāng)有效波高>0.1m時,波浪會顯著改變藻類運動方式,破壞藻類表層聚集形態(tài);湖流對藻類水平漂移速率無顯著性影響;藻類水平漂移方向受湖流流向和風(fēng)向的共同作用;藻類水平漂移速率與風(fēng)速、波高、湖流流速間關(guān)系可用多元線性方程表達(dá),且擬合度良好,可為藻類水華預(yù)測模型構(gòu)建提供依據(jù).關(guān)鍵詞:太湖;原位觀測;漂移速率;影響因素;竺山灣Characteristicsandimpactfacto
3、rsofalgalhorizontaldriftinginLakeTaihuDENGJiancai,LIUXin,ZHANGHongmei,CHENFang。XUBin。&SHENAichun,(1:StateKeyLaboratoryof婦ScienceandEnvironment,NanjingInstituteofGeographyandLimnology,ChineseAcademyofSciences,Nanjing210008,P.R.China)(2:TaihuHydrologyandResourcesSurveyBureau,Wu
4、xi214024,P.R.China)Abstract:/n—situobservationplatformwasusedtoinvestigateimpactsofwindspeed,lakecurrentandsignificantwaveheight(SWH)OilalgalhorizontaldriftingvelocityinZhushanBay,LakeTaihu.Resultsshowedthatalgaldriftingrateondifferentobser—vationdayswasalternatingzigzagtypec
5、haracteristics,andthentheamplitudeofalgaedriftingvelocitywithinonedaybecameobvi—ouslydifferent.Asignificantpositivelinearcorrelationbetweenalgaldriftingvelocityandwindspeedwasobserved.WhenSWHsarewithintherangeof0.02mand0.1m,therewasadramaticallynegativelinearcorrelationbetwee
6、nalgaldriftingrateandSWHs;whenSWHswerelargerthan0.1m,wavecouldmarkedlychangealgaedriftingpatternsanddestroyalgaetabletlayers.Lakecurrenthadinsignificantefectonthealgaldriftingrates,althoughthedirectionofalgaltransportwasregulatedbythedirec—tionsoflakecurentandwind.Therelation
7、shipsbetweenalgaehorizontaldriftingratesandwindspeeds,SWHsandlakeflowmaybeexpressedbyamultiplelinearequationwiththegoodnessoffit,whichprovidedatheoreticalbasisfortheconstructionofalgalbloompredictionmode1.Keywords:LakeTaihu;in-situobservation;driftingvelocity;impactfactors;Zh
8、ushanBay大多數(shù)水華藻類具有偽空胞”,通過浮力調(diào)節(jié)作用,實現(xiàn)在水體垂向的移動.在靜風(fēng)或弱風(fēng)條件下,藻類偽空胞的浮力調(diào)控使其進(jìn)入水體