共查询到20条相似文献，搜索用时 15 毫秒
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SHEN Huanting Institute of Esturaine Coastal Research East China Normal University Shanghai China LI Jiufa Institute of Esturaine Coastal Research East China Normal University Shanghai China ZHU Huifang Institute of Esturaine Coastal Research East China Normal University Shanghai China HAN Mingbao Institute of Esturaine Coastal Research East China Normal University Shanghai China ZHOU Fugen 《国际泥沙研究》1992,(3)
The Changjiang River is characterized by the enormous volume of runoff and the great amount of sediment load with remarkable seasonal variation. The annual runoff sometimes is respondent to the amount of sediment load, and sometimes not. The amount of monthly sediment load after the month of the maximum runoff is larger than those before the month. The sediment concentration and net quantity of sediment transport in the vicinity of the river mouth varies greatly in time between the ebb and flood, spring and neap, and dry seasons and flood seasons. The three bifurcations also have differences in concentration and net quantity in space. Even in the same bifurcation they have differences in and out of the sand bar. At present, the North Channel is the main passage for water and sediment load emptying into the sea from the Changjiang River. More than 50 percent of the sediments from the river basin are deposited nearby the South Branch entrance and the main depositional area is situated in subaqueous delta off the South Channel. Between 122°30'E and 123°E is an important boundary for eastward sediment dispersion from which the suspended sediment are dispersed towards the east by south. 相似文献
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T.SONG Post-Doctoral Fellow School of Civil Structural Engineering Nanyang Technological University Nanyang Avenue Singapore . Presently Civil Engineer Engineering Depatment Technology Division Maritime Port Authority of Singapore. 《国际泥沙研究》1997,(3)
I.INTRODUCTIONBedloadtransportinsteadyuniformopenchannelflowhasbeenextensiVelystudied.Manyoftheformulasdevelopedforthepredictionofbedloadtransportinuniformopen-channelflowcanbebroughtinthefollowingform(ChienandWan,1983);ac=f(O)(l)xvhereacisthedimensionlessparameterofbedloadtranSPortandOisthedimensionlessparameterofflowintensity.TheseparametersaredefinedasfwheregsisthebedloadtranspoftratePerunitwidthindryweight;disthesedimentdiameter,Sisthebedslopeofthechannel;Rbisthehydraulicradiusdue… 相似文献
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ZHANG Hongwu HUANG Yuandong ZHAO Lianjun Department of Hydraulic Engineering Tsinghua University Beijing China Yellow River Institute of Hydraulic Research Zhengzhou China 《国际泥沙研究》2001,16(2)
1 INTRODUCTIONMany mathematical models for sediment transport have been developed for solving practical Problemsin hydraulic engineering. HoweveT, most of them are not able to simulate the hyper-concentratd flows inthe Lower Yellow Xiver because of the extremely high load concentration of the flows. This paper isdevoted tO the simulation of unsteady sediment trallsport in the Lower Yellow mveLIn this paPer, the riverbed deformation equation is modified and the new expressions for sedi… 相似文献
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SHEN Xianchen 《国际泥沙研究》1997,(1)
I.INTaonUCTIOXP-NCBisatoxiccompoundwhichmaycausecarcinogenicoramutation.NowthetransPOrtandtransformationofthiskindOfsubstanceinnaturalwaterbodyisthefocusofresearchofscientistsintheworld.ThroughthestudytherelationshipbetweennonionicorganiccomPOunds,suchasP-NCB,andsuspendedsedimentisfoundtobeveryclOSe,suspendedsedimentareload-supPOrtingofmovementandmediateagentofreactionofP-NCBinwater.TheYellowRiverisheavilysediment-laidenriverintheworld.Sometimesthesuspendedsedimentcanbeupto200kgpe… 相似文献
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Pedro A. BASILE Center for Hydroenvironmental Research National University of Rosario 《国际泥沙研究》2001,16(3)
1 INTRODUCTIONMany hydro-momhological mathematical models neglect the innuence of river bed maerialheterogeneity and its time and space changes during transport and related erosion/dePosition processes. Inthese models a rePresentative diameter of the river bed grain-size distribution (for examPle d5o) isspecified as initial data in each comPutational point of the modeled domain. Different d5o can be assignedto each ghd point but temPoral changes in bed material gradation cannot be simula… 相似文献
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The paper presents the 3D finite element simulation of tidal flow and sediment transport in the estuarine region of the Haihe river. The proposed model adopts sigma-transformation of the hydrodynamic and sediment transport equations. The hydrodynamic and sediment transport models are verified in case of a simple test problem for which analytical solutions are available. Finally the models are applied to muddy Haihe river estuary of North China and it is claimed that hydrodynamic and sediment… 相似文献
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SHEN Zhigang Department of Engineering Mechanics Shanghai Jiao Tong University Hua Shan Road Shanghai China. 《国际泥沙研究》2001,16(2)
SEDIMENT TRANSPORT IN TIIE YANGTZE RIVER ESTUARYSHEN Zhigang'ANSTa^CTThe hy~ntalc and the sedimen tranSport Patter'nS within the estUaIy of the YangtZe mver arecomPlex because of intemehon of fluvial and the hdal forCes, depending on freshwate discharge andhdal range. Based on the data measuIed in meent years, thes papo discusses the characterishcs of flowand sNnt movemen in the tw forer EstUaIy and their iIifluences on the evolution of theestuaryKey W: YangtZe mver… 相似文献
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Katinka KOLLand Andreas DITTRICH Institute of Resources Management Hydraulic Rural Engineering University of Karlsruhe Kaiserstr. Karlsruhe Germany. 《国际泥沙研究》2001,16(2)
1NFLU'ENCE OF SEDmeNT TRANSPORT ON ARMORED SURFACESKatinka KOLLl bo Antheas DrmCHlAbstract:LaboratOry exWnts have been cAned ou to stUdy the chateristics of stwen tZ'ansport inSteeP tw. The question is discussed wether an annM sMs is deStroyed due tD thebosport of material, because addihonal wises are tw on iL or the laye is shehe by thetranSN medal, beause a part of the stream poWer is used to move the material. Accordin tothe resultS of the PresN exH' in Wh the Me… 相似文献
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R.H. MAT SUKI R.BAKER ①Lecturer Dept. of Civ. Struct. Engrg. Univ.Kebangsaan M''''sia Bangi Malaysia ②Lecturer Dept. of Civ. Engrg. University of Salford. MWT England. 《国际泥沙研究》1991,(2)
The study of Sediment transport of low concentration in pipes bas been applied in the design of a self-cleansing storm sewer. An alternative criterion is suggested as op- posed to the widely used single flow velocity approach. A conceptual model which simu- lates the condition in a storm sewer is developed and tested against experimental data. The results proved that the volumetric sediment concentration, pipe diameter and sedi- ment size have to be taken into consideration to produce a self-cleansing storm sewer. It also shows that the slope obtained by this alternative criterion is lower than the single flow velocity approach. 相似文献
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~~THE EFFECTS OF TURBULENT BURSTING ON THE SEDIMENT MOVEMENT IN SUSPENSION@Ye MAO$Hohai University!Nanjing 210098 China~~ 相似文献
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1 INTRODUCTION Alluvial streams generally have permeable bed sediments that can admit significant pore water flows. Steady flow of surface water over bed roughness features such as sand waves or pools and riffles can then drive water flow into and out of the shallow subsurface. This is often termed hyporheic exchange, and the subsurface region where mixing between stream and ground waters occurs is the hyporheic zone (Hynes, 1983). The hyporheic zone has been shown to be a critical com… 相似文献
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EXPERIMENTAL STUDY ON WAVE ENERGY DISSIPATION AND COHESIVE SEDIMENT TRANSPORT IN SILT COAST 总被引：3，自引：0，他引：3
Shixiong HU Onyx WAI International Research Training Center on Erosion Sedimentation P.O.Box Beijing China. Department of Civil Structure Engineering Hong Kong Polytechnic University Hong Kong China. 《国际泥沙研究》2001,16(2)
EmmmL STonY ON w^rs EareGY DlsSunnox AunCOIIES1VE SEDonT TRANSPORT 1N SirT COASTShaong HUl and Onyx WAI2Abstract:The interahon betwee the wave and fluld mud laye Plays an twrtan fOle in the develOPmen ofsilt coast. Sediment is essenhally transported in the form of rheological flow of mud laye unds thewave achon, and on the other hand, the fluid Inud layer dams the wave consfory. ms papestUdies the laws of wave energy dissiPation and mud bed deformhon, and the moveInen of… 相似文献
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QI Pu ZHAO Yean Engineer Institute of Hydraulic Research Yellow River Conservancy Commission Engineer Institute of Hydraulic Research Yellow River Conservancy Commission 《国际泥沙研究》1993,(1)
1. INTRODUCTIONThe Yellow River is a heavily sediment--laden river. Floods at Hyperconcentrationso f sediment (hereinafter simply referred to as hyperconcentrated flood) frequently occurring in the main river and its tributaries possess different characteristics of sedimenttransport. Sometimes they cause severe deposition whereas at other times they are capable of carrying substantial amount of sediment over long distances. The study on the lawof sediment transport is of significance to … 相似文献
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J. Val KLUMP David N. EDGINGTON James T. WAPLES Donald C. SZMANIA Bruce E. BROWN Kent A. ORLANDINI 《国际泥沙研究》2003,(2)
1 INTRODUCTION Sediment resuspension, particularly in response to episodic storm events, is a common characteristic of coastal and nearshore environments. The resulting 揵enthic storms?may play a significant role in the dynamics of benthic systems, including structuring the physical characteristics of the bottom, providing a mechanism for the recycling of biogeochemically important materials to the water column, and driving horizontal and cross margin transport of suspended particulates … 相似文献
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U.C.E. ZANKE 《国际泥沙研究》2003,18(1)
1 PROBLEM DEFINITION Owing to the practical importance of the initiation of motion many researchers began to tackle this problem even at the beginning of the last century (e.g. Kramer (1932, 1935), Casey (1935)). Shields (1936, Fig. 1) developed a non-dimensional representation based on the measured data of Casey, Kramer, USWES and Gilbert, together with his own data based on investigations with succinite sand, lignite, granite chips and heavy spar. Despite the different material p… 相似文献
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~~AN EXPERIMENTAL STUDY ON SEDIMENT FLUSHING OF DONGZHUANG RESERVOIR ON THE JINGHE RIVER@Hongwu ZHANG$Department of Hydraulic Engineering,Tsinghua University!Beijing100084
@Ouyang ZHANG$Department of Hydraulic Engineering,Tsinghua University!Beijing100084
@Junhua ZHANG$Institute of Hydraulic Research of Yellow River Conservation Commission!zhengzhou 450003
@Guodong WANG$Institute of Hydraulic Research of Yellow River Conservation Comm… 相似文献
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L. YILMAZ Vijay P. SINGH S.K. MISHRA D. D. ADRIAN J. J. SANSALONE Civil Engineering Faculty Hydraulic Division Technical University of Istanbul Maslak Istanbul Turkey 《国际泥沙研究》2002,17(1)
1 INTRODUCTION River erosion is a complex phenomenon. The rate of bank retreat is determined by flow, bed topography, sediment transport, bank properties, and water quality. Prediction of future river planform changes and the knowledge of river erosion and river meandering are required for land use planning in alluvial river valleys and determining locations for bridges and hydraulic structures. The control of riverbank erosion requires prediction of flow and bed features in a meanderin… 相似文献