Searched for: subject%3A%22river%255C+dynamics%22
(1 - 8 of 8)
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Roebroeck, Mathieu (author)
Humans have a long history of intervening in natural river systems. These human interventions affect how water and sediment interact with the bed and banks of the river. The interaction between water and sediment is called morphodynamics and is an important component of the natural ecosystem of the river and its surroundings. This research aims...
master thesis 2022
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Kästner, K. (author), Hoitink, A.J.F. (author), Torfs, P. J. J. F. (author), Deleersnijder, E.L.C. (author), Ningsih, N.S. (author)
Conceptually, tidal rivers are seen as narrow channels along which the cross-section geometry remains constant and the bed is horizontal. As tidal waves propagate along such a channel, they decrease exponentially in height. The more rapid the decrease, the stronger the river flow. Near the coast, the tidally averaged width and depth change...
journal article 2019
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Chavarrias Borras, V. (author), Schielen, R.M.J. (author), Ottevanger, Willem (author), Blom, A. (author)
A two-dimensional model describing river morphodynamic processes under mixed-size sediment conditions is analysed with respect to its well posedness. Well posedness guarantees the existence of a unique solution continuously depending on the problem data. When a model becomes ill posed, infinitesimal perturbations to a solution grow infinitely...
journal article 2019
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Mulatu, C.A. (author), Crosato, A. (author), Moges, Michael M. (author), Langendoen, Eddy J. (author), McClain, Michael (author)
The meandering Ribb River flows in northwest Ethiopia to Lake Tana, the source of the Blue Nile River. The river has already undergone changes due to several human interventions, such as embanking, sand mining, water extraction and lake level regulation for hydropower. At present, a dam and a weir are under construction to store and divert...
journal article 2018
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Bregman, Martijn (author)
This thesis presents a new methodology for representing the effect of spiral flow on the bed shear stress magnitude and direction, using a low-vertical-resolution three-dimensional model. Furthermore, it discusses the performance of the new methodology in comparison with conventional high-vertical-resolution three-dimensional and depth-averaged...
master thesis 2018
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De Vries, M. (author)
In river engineering morphological predictions have to be made to study the implications of changes in a river system due to natural causes or human interference. It regards here time-depending processes. Characteristic parameters of the river have to be forecasted both in time and space. The morphological processes, however, are extremely...
report 1985
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Ribberink, J.S. (author), Van der Sande, J.T.M. (author)
The problem of aggradation in a river due to overloading is tackled with a mathematical model consisting of a set of one-dimensional (in space) basic equations in which the water motion is assumed to be quasi-steady and the sediment transport is determined by local conditions. Analytical solutions are presented of a linearized simple-wave model,...
report 1984
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Olesen, K.W. (author)
The paper presents a linear perturbation analysis of a horizontal two-dimensional mathematical model for the flow and bed topography in straight alluvial rivers with dominant bed-load. A sediment transport model including effects of transverse bed slope, secondary (helical) flow and secondary flow inertia is employed. The stability and the...
report 1983
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