北盘江干流鱼类资源环境监测及鱼类保护研究

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1、三峡大学硕士学位论文area；Hydropowerdevelopmentresultthechangesofhydrologicalregime，andjetstreambecomessloworstaticreservoirbay，thecompositionoffishisalsodominatedbytherapids,water-basedthestaticslowflow；HydropowercascadedevelopmentchangesthepHysicalandchemicalpropertiesofwater，mainlyint

2、ransparencyincreased，themagnitudeofthetemperaturechangeswiththeseasonsdecreases,tendtohomogenize，thePHofwaterbodiesenhance，theriverwaterflowratesbecomesmallerandsoon；Thefoodbiologicalbasischangesafterthereservoirformation，andwaterbiologicalproductivitycapacityincrease，sofishst

3、ocksandfishingvolumewillrise；theadaptationslowfloworhydrostaticenvironmentfisharethemajorcomponentinthecatching，andtheproportionofrawfishadaptingtotheenvironmentoftheriverwaterdownorevendisappearinthecatching.5)FishresourcesprotectionmeasuresTheprotectionmeasuresofBeipanjiangr

4、ivercascadehydropowerprojectdevelopmentinfluenceonfishresourcesmainlyincludeengineeringmeasures,buildingfreightfishboatandartificialfishingthroughthedamarefeasibleandtheengineeringmeasuresofrelativelygoodeffect.Artificialreproductionandreleasing,insituconservation(Importanthab

5、itatprotection,theestablishmentofprotectedareas),Scientificcontrolandstrengthenappropriatefisherymanagement.Keywords:BeipanjiangRiver；FishResources；StatusSurvey；Influence；Protection；DIDSONVI万方数据三峡大学硕士学位论文目录1.绪论...................................................................

6、............................................11.1研究背景............................................................................................11.2研究目的和意义................................................................................41.3主要研究内容、研究方法和技术路线......................

7、.......................52.北盘江监测断面环境现状及DIDSON监测方法.........................................82.1自然环境及工程概况........................................................................82.2流域水电开发概况..........................................................................102.3双频识别声呐DIDSON

8、简介...........................................................