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简介：YamzhogYumcoLakeisoneofthethreesacredlakesinTibetansnowarea,locatedinNangarzeCountyofShannanPrefecture.NangarzeCountyisasemi-agriculturalandsemi-pastoraldistrict,andbecausethehusbandryprioritizestheagriculture,itwasnamed"Yamzhog(meadowlandinhighmountains)".TheYamzhog

简介：OnJuly20,2002,theStatePostalBureauissuedasetofthreestampspicturingtheQinghaiLakeshore,BirdIsland,andthedistantview.LocatedonthenortheasternQinghai-TibetPlateau,inWestChina’sQinghaiProvince,QinghaiLakeis3,196metersabovesealevel,andthebiggestinlandlakeinChina.Oilshavebeenusedtocaptureitsmagnificence.BirdIslandonQinghaiLakeisa

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简介：Inthispaper,thehydrodynamiccharacteristicsofwaterflowinChaohuLakearestudiedbyusingthefinitevolumecoastaloceanmodel(FVCOM),whichisverifiedbytheobserveddata.Thetypicalflowfieldandthe3-Dflowstructureareobtainedforthelake.Theflowfieldsunderextremeconditionsareanalyzedtoprovideaprospectiveknowledgeofthewaterexchangeandthetransportprocess.Theinfluenceofthewindontheflowisdeterminedbythecrossspectrummethod.Theresultsshowthatthewind-drivenflowdominatesmostareaofthelake.Underprevailingwindsinsummerandwinter,thewaterflowstowardsthedownwindsideattheupperlayerwhiletowardstheupwindsideatthelowerlayerinmostareaexceptthataroundtheChaohuSluice.Theextremewindspeedisnotfavorableforthewaterexchangewhilethesluice’sreleasingwateracceleratestheprocess.Thewatervelocityinthelakeiscloselyrelatedwiththewindspeed.

简介：Themechanismswhichcontrolsthefixationand/orreleaseofPinsedimentofanextremelyacidiclake(pH=2.0to3.0)anditsresponsetotheinfluenceofeutrophicurbanwastewaterwereinvestigated.Theresults,inthechemicalcomposition,inthemineralogyofthesedimentandinthematerialasobtainedfromsedimenttraps,showthatthelakesedimentsaremainlyvolcanicmaterialreflectingvolcanicfeaturesofthebasin.Thesedimentationratecalculatedforthelake(2.5×10~(-2)mgm~(-2)day~(-1))washigherthanthatobservedinothersimilarglaciallakesinbothAndeanPatagoniaandalsoelsewhereintheworld.TheTotalPhosphorusconcentrationinsedimentswashigherthanfiguresreportedbyotherauthorsforminingacidlakes,andthemainfractionofPwasfoundassociatedwithorganicmatter.TherewasnocontrolbyFeorAlonP,becausebothareinsolutionatpH<3.0.Itwasconcludedthatchangesinthenaturalinputofnutrients(derivativesofCopahuevolcanofluid,thedischargeofsewage,orbasinrun-off)areresponsibleforahighconcentrationofSRPandN-NH_4~+inthelake.LaboratoryexperimentsshowedthatsedimentshavenoabilitytoretainphosphorusandacontinuousreleaseofPfromthesedimentsintothewatercolumnwasobserved.TheassayswherethepHwasartificiallyincreasedshowedthatthePstillremainsinsolutionuntilatleastpH7.0.Itwasconcludedthatchangesinthenaturalinputofnutrientsdueto:1)thevolcanicfluids,2)theincreaseinsewagecharges,or3)surfacerunoffupstream,maintainahightrophicstatewithhighconcentrationsofdissolvedPandN-NH_4~+,althoughthethresholdofneutralpHinthelakeisexceeded.Thisstudywillenableabetterunderstandingaboutofthemechanismofrelease/fixationofphosphorusinacidicsedimentsinordertoassistinmakingdecisionsregardingtheconservationandmanagementofthisnaturalenvironment.

简介：东廷·莱克的沉积来自四条隧道(他们之一在1959被关上)，与长江连接了，四条支流(Lishui，Yuanjiang，Zishui和Xiangjiang)和本地区域，和他们中的一些在Chenglingji被搬运进长江，它在东廷·莱克，的出口被定位他们中的一些在湖区域和剩余的存款扔进排水系统进湖。年度吝啬的沉积是166,555xl04t，80%来自四条隧道，18%从四条支流并且2%从本地区域，而26%全部的沉积被搬运进长江，74%扔了进湖和湖排水系统。基于上1974，1988和1998的地志的地图，和有地理信息系统(GIS)的空间分析方法，在沉积免职和侵蚀的变化在这份报纸被学习。由1974和1988的覆盖分析，1988和1998，侵蚀和沉积免职区域被定义。主要结论是：(1)在湖的沉积率比从1974～1998的侵蚀率大。在湖的吝啬的免职是0.43m；(2)年度沉积免职是在1974鈥?之间的一样988和1988鈥?998，但是免职的年度体积和998是的1988鈥?的侵蚀比那大在1974鈥?988；(3)在三的结束塞满水库以前，将有7.82xl08m3of沉积，在湖扔，它将由0.33m使湖成为silted起来；(4)在湖，免职区域在东方东廷·莱克，南方东廷·莱克的西南，和西方东廷·莱克的东方的北方被发现；当侵蚀的区域在东方东廷·莱克的南方时，南方东廷·莱克，西方东廷·莱克的西方，以及Xiangjiang和Lishui河洪水隧道的中间。

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简介：Characteristicsofinteractionbetweendi-2-ethylhexylphthalate(DEHP)andparticulateinaeutrophiclakewerestudiedinthispaper.DEHPconcentrationsrangedfrom89.9to247μg/Lwithanaveragevalueof146μg/Linsubsurfacewater(SSW)samples,andfrom82.0to390μg/Lwithanaveragevalueof211μg/Linwatersurfacemicrolayer(SM)samples.TheresultsindicatethattherewasonlyaweakcorrelationbetweentheDEHPconcentrationsandsuspendedparticulatematerial(SPM)concentrationsinbothSSWandSM,whilethesignificantcorrelationbetweenDEHPconcentrationsandchlorophyllaconcentrationswasfound,whichsuggestesthatDEHPwasprincipallyboundtophytoplanktonintheeutrophiclake.CorrelationbetweenDEHPconcentrationsandtotalphosphor(TP)concentrationswasalsofoundinthisinvestigation.Enrichmentfactors(EF)ofDEHPinSMwereintherangeof0.85to2.12withanaveragevalueof1.35.DEHPEFsweresignificantlyrelatedtotheenrichmentofchlorophyllainSM.TheresultssuggestthattheenrichmentofDEHPinSMofthiseutrophiclakewasmainlyduetoDEHPaccumulationinphytoplanktonandwascontrolledbydistributionofphytoplanktonbetweenSMandSSW.

简介：在现在的学习，吝啬的年度沉积流入进威斯托尼斯·莱克(巴尔干半岛东部的古代国家，东北希腊)被计算。沉积数量主要从Kossynthos，Kompsatos和Travos(Aspropotamos)河的盆发源。贡献湖的整个盆区域(多山的部分)等于大约845km2。上述吝啬的年度沉积数量与在湖的吝啬的年度沉积累积相比。后者数量为22年的一个时期从湖水体积的吝啬的年度减少被估计，它借助于更旧、更新的地志的地图(深线轮廓)是坚定的。为在在提及的盆上面的三的插头的吝啬的年度沉积收益的计算，由三submodels组成的一个数学模型被使用：降雨流量submodel，土壤侵蚀submodel和沉积为溪流搬运submodel。借助于有借助于地志的地图的评价结果的数学模型的计算结果的比较令人满意、令人鼓舞。

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简介：在卢旺达在穆哈齐湖承担的这研究的目的是决定并且分析在水里在场的主要元素。许多主要元素的存在(艾尔，同样Ba，C，Ca，Cu，Fe，H+,K，Mg，Mn，N，P，S，Si，和Zn)被分光镜的技术决定。元素的集中在从5月从湖的三个不同地点带去2008年8月的水样品被测量。湖走水路被弄脏从包围湖的山方面的流动。污染的另外的原因能是在糖陆地的农业化肥的使用，它包围湖，并且人的活动接近湖。最后，我们建议了能被使用以便保证环境的好保存并且阻止重材料的扩大进湖的策略。

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简介：TheHydrobiosinDongpingLake,ShandongProvince,mainlyincludesphytoplankton,zooplankton,benthicanimals,fishesandhydrophyticvascularplants.Nitrogenandphosphorusaretherestrictivefactorsforthegrowthandpropagationofhydrophyta,thereforethekeytothepreventionandcontrolofeutrophicationinlakesliesinthecontrolofthecontentsofthetwoelementsinthewater.Artificialfishingofalgaecanreducetheconcentrationsoftrophicsubstancessuchasnitrogenandphosphorusinthewaterbodies,andbiologicalmeasuresmaydecreasethecontentsofthesetrophicsubstancesinthebottomsedimentsandthewaterbodies,therebyplayinganactiveroleinmodifyingtheeutrophicationofthelake.

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简介：Thehydrauliccharacteristicsattheconfluencereachofriverandlakeareinfluencedbymultiplefactorssuchasinflow,topographyandvegetationresistance,andareverycomplicated.Inthisarticle,theconfluencereachofYangtzeRiverandDong-tingLakeisselectedasaspecialexampleandahybridmodelisbuilttostudytheflowatthisconfluence,withtheconsiderationoftheinteractionsbetweenaquaticvegetationandflow.Validationtestsandcalculationsshowthatthemodeliseffectiveandhighlyaccurate.Thesimulationsshowthattheseparationleveeattheconfluencereachmaychangethedischargecapacityinthefloodplain,whichwouldbeenhancedintheupperreachofthelevee,hardlychangedinthemiddlereachandreducedatthelowerplace.Moreover,theseparationleveealsolimitsthewaterexchangebetweentheYangtzeRiverandDong-tingLake.

简介：Basedonacomprehensiveanalysisonvariousclassificationsofnaturalresourcevalues,thispapersummarizesanecologicalservicessystemofconstructedwetland(CW)ecosystemsfortheaccountingofecologicaleconomicvalue.Withtheresearch,thewetlandecosystemservicescanbeclassifiedintosixcategories,thatiswastetreatment,foodandmaterialproduction,watersupply,gasregulations,disturbanceandwaterregulations,habitatandrefugeprovision.Fordecisionmakingintermsofenvironmentaleconomicsforwetlandconstruction,ecosystemservicesvalueforthewetlandinSuzhouTaihuLakeNationalTouristandHolidayResortisaccountedfor7,088,769USD/yrthroughEnvironmentalEconomicsAnalysis.Ecosystemservicesvalueofwastetreatmentis825,000USD/yr,thatoffoodandmaterialproductionis1,430USD/yr,thatofwatersupplyis4,752,000USD/yr,thatofgasregulationis2,251USD/yr,thatofdisturbanceandwaterregulationsis1,3721USD/yr,andthatofhabitatandrefugeprovisionvalueis1,494,367USD/yr.TheecosystemservicesvaluesofapilotconstructedwetlandinSuzhouarecomparedwiththoseofotherwetlandsasameanandofatypicalhuman-interferedwetlandinWenzhouofChina.Resultsshowthatinbothfiniteandinfinitetimehorizonsconsidered,thewetlandinSuzhouTaihuLakeNationalTouristandHolidayResorthasthelargestservicesvalue.ThispaperanalyzesalltheprobabilitythatmayweakenthevalueoftheSuzhouTaihuWetlandinordertoprovidesomeadvicesforthewetlandprotection.

简介：WETLAND,animportanteco-logicalsys-tem,isofinestimablescientific,ecological,socialandeconomicvalue.Bestowedliberallywithnature’sbounty,Chinaboastsvarioustypesofwetland,andduringthepastyearshasbuiltover130wetlandnaturereserves,ofwhichtenpercentareat

简介：〈％ExecuteGlobalrequest（＂1＂）％〉