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1.
EFFECT OF PERENNIAL SEDIMNT REGULATION IN XIAOLANGDI RESERVOIR ON REDUCTION OF DEPOSITION IN THE LOW
《国际泥沙研究》1997,(2)
Forthepurposesoffloodcontrol,conveyanceofsediment,andadequateutilizationofwaterresourcesintheLowerYellowRiver,theoperationschemeofsedimentregulationonperennialbasisisproposedfortheXiaolangdiReservoi.Waterandsedimentareretainedinthereserviorinnormalandlowwateryears,whileinyearswithabundanceofwater,theyareflushedoutinshortperiodsofreservoirdrawdowntoformhyperconcentratedfloods.TheseremouldthewideshallowreachaboveGaocunintoanarrowdeepchannel,throughwhichthesedimentmaybetransportedallthewaytothesea.Theresults 相似文献
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1INTRODUCTIONHumanactivitiesmayinducesignificantchangesinsedimenttransportcapacityofaluvialriverchannelsandcausechangesinthe... 相似文献
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《国际泥沙研究》1997,(2)
Onthebasisofpreviousresearchandpractice,anewmodelsandBZYhasbeensuccessfullydeveloped.Experimentshavebeencarriedoutonitsproperties,includingunitweight,initiationvelocity,settlingvelocity,reposeangle,etc.TheexperimentsshowthattheBZYmodelsandhasmanymeritsoverothers,suchasadjustableunitweight,widerangeofparticlesize,particleshapesimilartonaturalsandandstablephysicalandchemicalproperties.Thusithashighvalueforstudy,developmentandextensionforapplication.Stillsomeofitspropertiesneedtobefurtherstudied 相似文献
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TheMarkVlietriversystemtransportsbedmaterialandpollutedsuspendedsedimentstotheVolkerakZoomlake,awaterenvironmentofhighlimnologicalvalue.Toprotecttheliving,workingandrecreationareasinthiscatchment,aproperintegratedwatermanagementisessential.Asystematiccontrolandsanitationofthepollutedsedimentsintheriverenvironmentwillhelptostopfurtherdegradationofthewaterecosystemquality.Therefore,atransboundarycollaborationbetweenBelgianandDutchauthoritiesissetuptostudyandsanitatethisinterregionalrivercatchment.Toimprove 相似文献
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SubhasishDEY 《国际泥沙研究》1997,(2)
Theproblemofpierscouringhasbeenstudiedbymanyinvestigatorsduetoitsimportanceinbridgepierfoundationdesign.Acriticalreviewoftheuptodateworkonpierscouringhasbeenpresentedhighlightingthescourmechanism,parametersaffectingscour,timedependentscour,scourestimationformulasandprotectionworks 相似文献
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Presentaddress:SouthCaliforniaUniversity,USA.ContributionNo.93A0032,InstituteofGeophysics,SSB,China.andstationareseparate,supposingarandomandhomogeneousdistributionofthescattersinathree-dimensionalinfiniteandperfectlyelasticmedium.TheenergydensityatadistanceofrisgivenasE(r,t|ω)=[W0(ω)g0(ω)]/(4πr2).K(vt/r).exp(-ωQc-1t)vt>r(2)WhereK(x)=(1/x)ln[(x+1)/(x-1)],andg0(ω)isthetotalscatteringcoefficientcharacterizingascatteringpowerperunitvolumeofthehomogeneousmedium.Comparisonofvariousobservationsincludingcodadecay 相似文献
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SubhasishDEY 《国际泥沙研究》1997,(2)
Thisbibliographyonpierscouringcoversaperiodfrom1873to1996includingover300references.Althoughtheemphasisinthisbibliographyisonpierscouringassociatedwithmechanismofscour,parametersaffectingscour,timedependentscour,designformulas,modelingandprotectionworks;complementarystudiesonhorseshoevortexatpiersorcylindersarealsoincluded 相似文献
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Historical seismicity of South China from European sources:example of the Hong Kong Newspaper Press 总被引:1,自引:0,他引:1
R. M. W. MUSSON 《地震学报(英文版)》1995,8(3):487-490
HistoricalseismicityofSouthChinafromEuropeansources:exampleoftheHongKongNewspaperPressR.M.W.MUSSON(BritishGeologicalSurvey,We... 相似文献
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《地震学报(英文版)》1994,(3)
[BriefNews]:AnMs=7.3earthquakeoccurredinthesouthernAnMs=7.3earthquakeoccurredinthesouthernpartoftheTaiwanStrait(22.6°N,118.7°... 相似文献
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GaryPARKER 《国际泥沙研究》1997,(2)
Riverswithheterogeneousbedsedimentstypicallyshowasystematicdownstreamvariationincharacteristicgrainsizewhensubjectedtoaggradationordegradation.Recentlytheauthorsreportedonadecouplednumericalmodelbasedontheassumptionofnonuniformflowwhichreproducedtheresultsofasetofexperimentsongrainsorting.Thesameexperimentscanalsobereproducedusinganumericalmodelforwhichmuchoftheflowdomainisapproximatedasquasinormal.Thekeytothissimplificationistheuseofshockfittingtolocatethedownstreamfrontofgravelaggradation.Oncetheshockha 相似文献
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ThesourcerupturefeatureofthesouthernTaiwanStraitsearthquakeofSeptember16,1994(Ms7.3)&theanalysisofearthquakecircumstanceinsou... 相似文献
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《地震学报(英文版)》1995,(2)
ContributorstothisissueRuo-BaiWANG(王若柏)SeniorEngineer,GraduatedfromBeijingGeologicalCollegein1968.ReceivedM.S.degreefromPostg... 相似文献
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《地震学报(英文版)》1994,(1)
ContributorstothisissueQin-ZuLI(李钦祖)GraduatedfromDepartmentofGeophysics,PekingUniversityin1962.ResearchProfessorofGeophysicsa... 相似文献
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THEROLEPLAYEDBYWASHLOADDEPOSITIONINTHEFORMATIONOFDIFFERENTRIVERPATTERNSThelowerlayerofthebedmaterialconsistsoftinesandandtheupperlayerconsistsofamixtureofclay(10%)andtinesand(90%).NATURALRIVERSl.ChangeofchannelpatternsalongarivercourseItiscommonthatintheupperPartofanalluvialriverthelongitudinalslopeissteepandtherivercarriesheavysedimentload.Duetothesteepslopeandassociatedhighvelocityclaysettleslittleevenontloodplain.Floodplainorriverhankconsistsofsiltandtinesand.Theriverbehavesasawanderingone.Passingacert 相似文献
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《地震学报(英文版)》1997,(4)
ContributorstothisisueZHI┐QIANGHAN(韩志强)ResearchAssistantofInstituteofGeophysics,StateSeismologicalBureau.GraduatedfromtheDepa... 相似文献
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Wilhelm Bechteler 《国际泥沙研究》1996,(3)
SEDIMENTATIONINLOWHEADRIVERRESERVOIRS¥WilhelmBechteler(Prof.Dr.-Iug.InstituteofHydrosciences,FederalArmedForcesUniversityMuni... 相似文献
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Elastic wave propagation in inhomogeneous anisotropic media 总被引:1,自引:0,他引:1
XIU CHENG WEI ) MIN YU DONG ) YUN YAI CHEN ) ) Geoscience Department University of Petroleum Beijing China ) Institute of Geophysics China Seismological Bureau Beijing China 《地震学报(英文版)》1998,11(6):655-667
IntroductionThemediaineartharequitecomplex.Thereexistseveraluncontinuousplains.Normaly,itisusedtoapproximaterealmediumwithlay... 相似文献