简介：在从流量的1960～2012个文件趋势的上面的Qingjiang河里的水文学数据由在降雨设计工程和长期的变化的水力发出的电力引起了。年度流量与年度降水强烈相关，但是是显著地与更早的价值相比在水库建设以后减少了。比较强烈，构造前和构造以后的降雨事件建议Chebahe和Dalongtan水库工程分别地抓紧洪水山峰和延期流量交货的大小。

简介：FollowingtheinvitationofVietnamInstituteforWaterResourcesResearch(VIWRR),theChinesedelegationfromHangzhouRegionalCenterforSmallHydroPower(HRC)headedbythedeputydirectorofNanjingHydraulicResearchInstitute(NHRI),directorofHRC,Prof.ChertShengshui,haspaidavisittoVIWRRfromJune5toJune9,2002toexplorethepossibilityandfieldsofcooperation.

简介：Abstract.OnthebasisofclassificationofgeographicalpropertiesarollingdevelopmentgoalprogrammingmodelisformulatedincorrespondencewiththeecopatterngroupinFour-LakeArea.Inthismodel,thecontrolofschistosomiasisandstrengthen-Lugofthedrainage-storagefunctionarebothregardedasecologicalmeasuresduringtheprocessofmulti-year(r0)ecologicaleconomicrollingdevelopmenttomaketheecoagrlculturalsysteminthisareaintoastablyoperating,ordered,andgoodcyclicsystemunderthesupportofsomecontrollablefactors.

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简介：<正>ZhangAutonomousRegion,theso-called"theroofoftheworld",isrichinwaterresources.Theannualrunoffoftheriversintheregiontotal448.2billioncubicmeters,accountingfor16.15％ofthenationaltotal.Thetotalamountoftheperennialwaterresourcesonaverage(?)nksfirstinChina.andthedevelopablewaterresourcestotal5.65millionkilowatts,ranking2ndinthewholecountry.Inordertostrengthenthewaterconservancy

简介：Themostdifficultthinginourwaterconservancydevelopmentiscapitaldeficiency.Accordingtostatistics,foreigninvestmentinwaterconservancydevelopmentonlyaccountsforthreepercentofourtotalforeigncapitalintroduction.Foreigndirectinvestmentinwaterconservancymakesuponly0.2percentoftotalforeigninvestmentinChina.Tochangethissituation,China’swaterconservancydepartmentistakingactivemeasurestointroducemoreforeigninvestment.

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简介：Installationofahydraulicturbineinawaterdistributionsysteminvolvinglongpipelinereachesrequiresseveraluniquedesignconsiderations.Forafixedspeedunit,theselectionofdesignpointsforheadandflowneedstobeoptimizedtoprovideanoperatingenvelopethatwouldmaximizethereturnontheinvestmentgiventhewidelyvariedflowandpressureconditionsimposedbythewaterdistributionsystem.Theselectionofaturbinedesignspeedisessentialinfacilitatingrunnerdesign,whichmustminimizethehydraulicpressuretransientsonturbinerunawaythatmayresultinoverstressingtheexistingpipelines.Methodandapproachtoevaluatetheseconsiderationsareoutlined.Relevantresultsfortheselecteddesignarepresentedusingthe4.3MWRanchoPenasquitosPressureControl/HydroelectricFacilityasanillustrativeexample.Licensingrequirementsforsmallinlinehydroelectricfacilitiesarealsobrieflydiscussed.

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简介：TheMinistryofEnergyhasworkedoutaplantolaunch60large-andmedium-sizedhydropowerprojectsbetween1991and2000,withatotaldesignedcapacityof70GW.Alsotheconstructionofsome8GWcapacityofsmallhydropowerstationswillstartduringthesameperiod.Fortheplannedlarge-andmedium-sizedprojects,prioritywillbegiventothoseontheupperandmiddlereachesoftheYellowRiver,themaincourseandtributariesoftheYangtzeRiver,theHongshuiRiverandtheLancangjiangRiver.

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简介：Inlinewiththerapidlyexpandingelectricpowerindustryinthiscountry,Chinanowownsaworkforcetotalingmorethanhalfamillionofstaffandworkersengagedintheconstructionofthermalpowerprojects;alsothetechnologyemployedintheirworkhasexperiencednotableprogress.Intheearlyfifties,constructionworkmainlyreliedonmanualmanipulation.Besidestheuseofhand-orelectric-drivenover-headcranesinsidethemachine-house,verticaltransporta-tiondependedmainlyonhoistersandpulleys;chainblockswerescarceatthattime.Horizontaltransportationwasmainlydonebymanualpulley-blocksandrollers,sometimesalsowithwinches.Electric-orgas-weldingbyhandwasthecommonprac-tice.Inaword,thetechnologywasbackwardandlabor-inten-

简介：Thepurposeofthisstudyistodevelopasimplifiedmathematicalmodeltosimulatesuspendedsolidsandtotalphosphorusconcentrationsinawetlandordetentionpond.Fielddatacollectedfromawetdetentionpondduringstormswereusedtodemonstratetheapplicationofthismodel.Favorableagreementsbetweenthemodelresultsanddatawereachieved.Theratioofaverageoutletmethodandsummaryofloadsmethodwereusedtoquantifytheremovalefficiencyofpollutants,reflectingtheefficienciesareveryclose.Theresultsofthisstudycanbeusedfornonpointsourcepollutioncontrol,wastewatertreatmentorbestmanagementpractices(BMPs)throughthewetland.

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简介：EDSSisacomprehensivesoftwaresystemforwaterqualitymanagementintidalrivernetworksingeneralandforthePearlRiverDeltainparticular.Itspurposeistoprovideapracticaltoolthatcouldassistgovernmentagenciesindecisionmakingfortheefficientmanagementofwaterresourcesintermsofbothquantityandquality.Bycombiningthecapabilitiesofgeographicalinformationsystem(GIS),databasemanagementsystem(DBMS),modelbasemanagementsystem(MBMS)andexpertsystem,theaimistoimprovethequalityofdecisionmakinginwhatisbecominganincreasinglycomplexarea.ThispaperfirstoutlinesthebasicconceptsandphilosophyadoptedindevelopingEDSS,thesystemarchitecture,designfeatures,implementationtechniquesandfacilitiesprovided.Thereafter,thecorepartofthesystemthehydrodynamicandwaterqualitymodelsaredescribedbriefly.ThefinalcontributioninthispaperdescribestheapplicationofEDSStothePearlRiverDelta,whichhasthemostcomplicatedtidalrivernetworkpatternsaswellasthefastesteconomicdevelopmentintheworld.Examplesaregivenofthereal-worldproblemsthatcanbeaddressedusingthesystem,includingcross-boundarywaterpollutionanalysis,regionaldrinkingwatertake-upsiteselection,screeningofimportantpolluters,environmentalimpactassessment,andwaterqualityzoningandplanning.ItisillustratedthatEDSScanprovideefficientandscientificanalyticaltoolsforplanninganddecision-makingpurposesintheinformationera.

简介：<正>1IntroductionBioflocsisaheterogeneousmixtureofthemicroorganisms,particles,organicpolymersanddeadcells,etc.(Hargreaves,2006).Amongwhich,heterotrophicbacteriaconvertefficientlytheammonianitrogenintothebacterialprotein,whichprovidesthesupplementaryfeedforcultureanimalsandreducesthenitrogenlevelintheculturesystem(DeSchryveretal,2008).Intheclosedaquaculturesystem,thegrowthof