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document
Mosselman, E. (author), Wijbenga, J.H.A. (author)
report 2007
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Eijgenraam, C.J.J. (author)
This report is part 1 of a Cost-Benefit Analysis of the project ‘Space for the Rivers’, which aims at improving the safety against flooding along the river Rhine. A new method has been developed to find the optimal safety level for dike rings against flooding and the accompanying investment strategy. This method has been applied to 22 dike rings...
report 2005
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Yossef, M.F.M. (author)
Report on a physical scale model test in the Fluid Mechanics lab on the effect of groynes on the bed and sediment transport in rivers.
report 2003
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Blom, A. (author)
Vertical sorting fluxes and the resulting organisation of grain size fractions over bed elevations, i.e. the vertical sorting profile, influence bedform dimensions and the bed surface composition. As a result, they will affect the bed roughness, the rate and composition of the sediment transport, the large-scale river morphology, and water...
report 2003
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Marchand, M. (author)
report 2003
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Jongeling, T.H.G (author), Blok, B.W.G. (author)
report 2002
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Yossef, M.F.M. (author)
Groynes are structures constructed at an angle to the flow in order to deflect the flowing water away from critical zones. They are made of stone, gravel, rock, earth, or piles, beginning at the riverbank with a root and ending at the regulation line with a head. They serve to maintain a desirable channel for the purpose of flood control,...
report 2002
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Baan, P.J.A. (author), Rabou, J.P. (author)
report 2002
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Wondergem, P.J.M. (author)
This investigation is aimed at creating an alternative concept of living with water and required flood safety for the large Dutch rivers, which concept can be realised over some hundred of years. It has provided the opportunity for frank and open thinking and discussion, and should lead to a concept that can be also used in other areas. An...
report 2001
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Sieben, A. (author)
In this report, some classical and new simplifications in mathematical and numerical models for river morphology are compared for conditions representing rivers in mountainous areas (high values of Froude numbers and relatively large values of sediment transport rates). Options for simplification are summarized based on time scale of hydrographs...
report 1996
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Kranenburg, C. (author)
A derivation is presented of a general cross-section averaged model of longitudinal dispersion, which is based on the notion of the advection of tracer particles. Particle displacement length and particle travel time are conceived as stochastic variables, and a joint probability density function is introduced to arrive at an integral advection...
report 1996
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Sieben, A. (author)
This report focusses on discontinuous behaviour of hydraulics and morphology in rivers. The varying widths, slopes and bed levels that can be observed in mountain rivers can induce rapid, or discontinuous changes at a short lengthscale. When present, these discontinuities have a major impact on changes in water and bed levels during floods. In...
report 1995
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Sieben, A. (author)
The ability of describing and predicting hydraulic and morphological phenomena in mountain rivers is limited, partially due to the limits of deterministic approaches where stochastic effects in sediment supply and water inflow are extremely significant, and partially due to the very specific conditions that can be observed in mountain rivers,...
report 1994
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Van Kuik, C.A. (author), Van Mazijk, A. (author)
In the one-dimensional 'Rhine Alarm Model' differences between the actual travel time of a pollution cloud, originating from an instantaneous release of an accidental spill, and the travel time, based on the flow velocity is represented by a lag coefficient. In the model this lag coefficient is defined by the relative difference between these...
report 1994
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Sieben, J. (author)
Present knowledge on fluvial processes in mountain rivers should be expanded to enable the development of projects dealing with mountain rivers or mountain-river catchment areas. This study reviews research on hydraulic and morphological features of mountain rivers. A major characteristic of mountain rivers is the variability of the hydraulic...
report 1993
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De Vries, M. (author)
In Chapter 2 of this report an overview is given on fluvial processes involved in the modelling discussed. Chapter 3 is concerned with scale models, whilst Chapter 4 deals with numerical models. The main problems treated are, firstly, modelling of the water movement, followed by sediment transport and morphology. Attention is also given to the...
report 1993
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Julien, P.Y. (author)
report 1992
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Snoeker, X.C. (author)
report 1992
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Helmer, W. (author), Litjes, G. (author), Overmars, W. (author), Barneveld, H. (author), Klink, A. (author), Sterrenburg, H. (author), Janssen, B. (author)
Hoe om te gaan met de Nederlandse riveren op een zodanige manier dat de natuur bevorderd wordt.
report 1992
document
Moll, J.R. (author)
report 1991
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