Searched for: classification%3A%22TKJ400400%22
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Bakker, M. (author)
Morphological development was researched along five meanders in the Allier river, France. This includes large scale development of meander form and direction and guiding factors and processes. On a smaller scale channel processes that form morphology, including bars and (secondary) channels. Five meanders in the Allier river, France,...
report 2005
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Spanjaard, G. (author)
The Geul river in the southern part of the Netherlands has had a long history of channel straightening and bank protection, but during the past few decades, large stretches of the Geul have been allowed to meander freely. During fieldwork in June 2003, erosion and sedimentation processes, as well as channelisation measures, were mapped and...
report 2004
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Buschman, F. (author)
AU over the world natui'al lowland rivers and streams are winding tlii'ough the sediments deposited in earlier times. These meandering rivers and streams show remarkable geometric similaiity: the ratio of the meander length to the width of the channel is constant. The process of meandering is thus independent of scale. Many theories and models...
report 2004
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Teuling, A.J. (author)
This study departs from the hypothesis that the often striifing geometric similarity and regularity of meanders is the result of the second law of thermodynamics applied to open dissipative systems. It is argued that along a meandering river the continuous production of entropy is as low and as uniform as possible. An expression of entropy...
report 2002
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Lancaster, S.Y. (author)
A topographic steering river meandering (TSRM) model based on continuity of a simplified flow field through bends is developed. The equilibrium coupling between helical flow and sediment transport, as in Ikeda [1989] determines downstream variation of transverse bed slope. The model tests the hypothesis that meander development patterns can be...
report 1998
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De Jésus Soriano Pérez, T. (author)
The prediction of planform changes is important for the site selection of structure like bridges or intakes. In the design of bank protection works it is indispensable to know future planform developments for the safety of structures and lands. The meander development process consists of translation and expansion of the bends due to bank erosion...
report 1994
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Simon, A. (author), Hupp, C.R. (author)
Hundreds of miles of streams in West Tennessee have been channelized or otherwise modified since the tum of century. After all or parts of a stream are straightened, dredged, or cleared, systematic hydrologic, geomorphic, and ecologic processes collectively begin to reduce energy conditions towards the premodified state. One hundred and .five...
report 1992
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Johannesson, H. (author), Parker, G. (author)
A mathematical model is developed for the calculation of flow field and bed topography in curved channels with an erodible bed. A small perturbation approach is used to linearize the governing equations. The downstream convective acceleration of the secondary flow is shown to give rise to a phase lag between secondary flow and channel centerline...
report 1988
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Shen, H.W. (author), Larsen, E. (author)
The process of meandering has a powerful influence on man's use of rivers and river valleys. Flood control; navigation; bank protection; water supply projects; agricultural and urban development; transportation systems; and pipeline adjacent to rivers all require a sound knowledge of the meandering process, in order to he successful, with...
report 1988
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Beck, S.M. (author)
A new model for bed topography is developed herein which accounts for phase lag and the influence of the width to depth ratio. This model is used to analyze four sets of data: two from laboratory channels and two from natural channels. Good agreement is found between the actual and the predicted bed topography. An iterative, two-dimensional...
report 1988
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Johannesson, H. (author), Parker, G. (author)
In the present work, a computer model for simulation of the migration of meandering rivers, developed by Beck [1985a], was applied to four rivers in the State of Minnesota. The computer model is based on a theoretical approach developed by Ikeda, Parker, and Sawai [1981]. The major objective was to evaluate the overall performance of the...
report 1985
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Hooke, R.L.B. (author)
A one-meter wide, meandering flume with movable sand bed was utilized in these experiments. Uniform flow was established at discharges of 20, 35, and 50 l/sec. Velocities near the bed, the distribution of sediment in transport, bed geometry, and strength of secondary flow were determined at each discharge . Bed shear stress was assumed to be...
report 1974
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Ackers, P. (author), Charlton, F.G. (author)
Investigations were made at the Hydraulics Research Station of channels which achieved a meander pattern in alluvium through natural processes at discharges between 0.2 and 3.2 cusecs. These followed an earlier programme in which the behaviour of straight channels was studied. Discharge, sediment load, hydraulic gradient and channel geometry...
report 1970
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