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VELOCITY FIELD AND RESISTANCE OF FLOW OVER ROUGH SURFACES WITH LARGE AND SMALL RELATIVE SUBMERGENCE 总被引:1,自引:0,他引:1
Andreas DITTRICH Institut fuer Wasserbau und Kulturtechnik Universitet Karlsruhe Kaiserstr. Karlsruhe Germany Katinka KOLL Institut fuer Wasserbau und Kulturtechnik Universitet Karlsruhe Kaiserstr. Karlsruhe Germany 《国际泥沙研究》1997,(3)
LINTRODUCTIONPreciseknowledgeofthevelocityfieldandthecorrespondingresistanceofflowoverrollghsurfacesareofgreatimportanceformanypracticalproblemssuchastheestimationofthestabilitVofbedmaterialinerosiveriversortheremovalofaccumulatedfinesedimentfromthechannelandthelooseningofgravelbedmaterialbycontrolledreleaseofreservoirwater.Thelatterprocedure,calledflushingflows,isfrequentlyspecifiedtorestoreortomaintainaquatichabitat(WILCOCKetal.,1996).Dependingonwaterdepthhandroughnessheightk.(=equiv… 相似文献
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Wolfgang MERTENS Prof. Dr.-Ing. Leichtweiss-Institut fuer Wasserbau Technical University of Braunschweig P.O. Box Braunschweig Germany 《国际泥沙研究》1997,(3)
LRESEarCHACTIVITIESCharaCtCriedcofunlinedalluvialriVersisthe~linteractionbettVeenwaterflowandmovableriVerbed.Sedimenttransport,bedresistanceandriVermorphologydecisivelydependontheflowconditionsandviceversathesefactorsgovernthehydraulicprocesses.EVenundersimplifiedconditions,e.g.inlaboratorytests,theseillteractionsareeXtremelycomplexandrelldsraliZationmakesengineeringproblemsevenmored~.TomaketheseprocessesmoreunderstandablecomprehensiVeresearchprojectswereconductedatseveralGermanuniv… 相似文献
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Helmut M.HABERSACK Research Assistant Institute for Water Management Hydrology Hydraulic Engineering Universitaet fuer Bodenkultur Muthgasse Vienna Austria 《国际泥沙研究》1997,(3)
1.INTRODUCTIONOVerthelastdecadesmuchprogresshasbeenmadeconcerningsedimenttransPOrtmodellingandmonitoring.Thedifferelltiationincatchmeflt-tvide,sectionalandlocalaspectsreflectsthefactthatmanysedimenttransportandpredictionmodelsaredealingwithspecialpartsofriverSystems,mainlydifferinginscale.Overthepastyears,scaleissuesinhydrologyhaverapidlyincreasedinimportance(BLoSCHL,1996).Onalargescaletheapplicationoffractals,self-similarityanalysistolandscapeorganizationandoptimalchannelnetlvorks(O… 相似文献
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