流速对水体富营养化的影响研究

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1、lIrllrlHII]H!llllll!lllrllllllllllllIY1525048分类号—TVl42—；X524密级单位代码学号10618106290806墨麽交通天謦硕士学位论文论文题目：流速对水体富营养化的影响研究研究生姓名；蒋文清导师姓名、职称：周富春副教授申请学位门类专业名称：论文答辩日期学位授予单位工学水力学及河流动力学答辩委员会主席：许光祥评阅人：卢培利2009年4月堑渣焦ABSTRACTTheoutbreakofwaterbloomisal(indofexcessivealgaepropagatio

2、nandaggregationphenomenaatacertaindegreeofnutrition，climate，hydrologicalconditionsandecologicalenvironment，andresultwhichenvironmentalfactorscombiningeffectsformsuchasTN，TP，pH，flowrateanddissolvedoxygen．Themainproblemsoflakeeutrophicationarealgalbloomsmaketheoutb

3、reakofthewaterbodylosstheuseoffunctions．Thepurposeofthispaperthroughtheindoorsandoutdoorstoexperimentwitheffectsofflowvelocityonalgaegrowth，aggregation，toidentifyrestrictionflowwhenalgalhappened，andthroughgrayincidenceorderanalyzesmechanismontheimpactoftheflowvel

4、ocityoneutrophicationtoprovidethebasisforthepreventionandtreatmentofeutrophication．Finally，thepapercomestothefollowingconclusions：：①Thispaperconductesindoorsandoutdoorstoexperimentwithalgalgrowthandcomestoapreliminaryverificationoftheexistenceofthecriticalflowvel

5、ocity．Ataparticularconditionsfindoutthecriticalflowvelocityofthegrowthofalgae．Fromtheindoorsexperiment，wecandiscovermatwaterbloommaybetakeplacein1000r／minaround．Fromtheoutdoorsexperiment，wecanfindoutthatwaterbloomofcriticalflowvelocityshouldbebetweenQ．08m

6、SandQ．1

7、m

8、S．②ThechangeofChlashowsthesametrendindifferentflowvelocity，whichincreasedatfirst，thendeclined．Chlorophyllaindicatestheproductivityofalgaeinwater,SOthattheflowvelocityofchlorophyllaindicatestheaffecttothewaterbody．(查)Comparedwithotherfactorsthegreyincedenceanaly

9、sisshowsthat，DOandpHhavecloserelationwithalgaebloom，analyzingthereasons，DOandpHmaybemainlyproducedbyalgaephotosynthesis，SOtheyhavecloserelationtothecolumeofthealgalgrowth．④Instaticcondition,thecorrelationoftotalphosphorus，totalni打ogen，flow，DO，pHandChla，isbetween0

10、．548and0．680；indynamiccondition，thecorrelationoftotalphosphorus，totalnitrogen，flow,DO，pHandChlahasasubstantialincreasebetween0．656and0．994．⑤Throughauthenticati