Journal of hydraulic research, Vol. 49 N° 2. Journal of hydraulic research - Mars/Avril 2011
| Titre : | Journal of hydraulic research, Vol. 49 N° 2. Journal of hydraulic research - Mars/Avril 2011 |
| Type de document : | Bulletin |
| Paru le : | 17/07/2011 |
Dépouillements
Article : texte imprimé
Gerd Pickert, Auteur ;
Volker Weitbrecht, Auteur ;
Andreas Bieberstein, Auteur
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Laboratory experiments were conducted to obtain detailed experimental data of high temporal and spatial resolution on the breach of homogeneous non-cohesive embankments due to overtopping. These results supplement earlier data for this embankmen[...]
Article : texte imprimé
Dimitris Souliotis, Auteur ;
Panayotis Prinos, Auteur
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The effect of a vegetation patch (VP) on the flow and turbulence characteristics is studied. Two turbulence models are used to simulate patch presence. Numerical results for both mean and turbulence flow characteristics are compared with availab[...]
Article : texte imprimé
Zahra Nourmohammadi, Auteur ;
Hossein Afshin, Auteur ;
Bahar Firoozabadi, Auteur
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The structure of turbidity currents released on a sloping bed below fresh water is investigated. Kaolin is used as a suspended material. Laboratory observations indicate that if a dense layer moves through the channel, the current thickness incr[...]
Article : texte imprimé
Roy M. Frings, Auteur ;
Willem Ottevanger, Auteur ;
Kees (C.J.) Sloff, Auteur
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Downstream fining of river bed sediments is well known for gravel-bed rivers, but also occurs in sand-bed rivers. The objective of this study was to determine the effect of selective transport processes, dune sorting, overbank deposition, channe[...]
Article : texte imprimé
Sebastien Muller, Auteur ;
Pascal Guiraud, Auteur ;
Alain Line, Auteur
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The behaviour of a particle bed subjected to viscous flow upstream of a weir is experimentally examined. Experiments were conducted in a rectangular flume in which oil circulated above a bed of solid particles. Within about 150 mm upstream of th[...]
Article : texte imprimé
Hyung-Jun Kim, Auteur ;
Yong-Sik Cho, Auteur
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Flood risk analysis requires adequate numerical modeling to estimate the inundation depth and velocity in a wide-ranging study area. Thus, accurate, simple, and efficient numerical models with adequate mesh systems are needed for large-scale flo[...]
Article : texte imprimé
Huan-Feng Duan, Auteur ;
Lee, Pedro J., Auteur ;
Mohamed S. Ghidaouic, Auteur
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This research investigates the applicability of the transient-based frequency-response function (FRF) method for detecting leaks in complex series pipelines. The behaviour of transient waves in these pipelines with internal series junctions indi[...]
Article : texte imprimé
Emmanuel Mignot, Auteur ;
Cienfuegos, Rodrigo, Auteur
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This experimental investigation focuses on the turbulence features of weak hydraulic jumps in rectangular channels for two different approach flow lengths. The turbulent kinetic energy equation includes the turbulence production and dissipation [...]
Article : texte imprimé
Kamal El Kadi Abderrezzak, Auteur ;
Leszek Lewicki, Auteur ;
André Paquier, Auteur
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An experimental study of the characteristics of dividing critical flows in a 90° open-channel junction formed by three horizontal equal-width branches is presented, conducted for various inflow discharges and downstream boundary conditions. Outf[...]
Article : texte imprimé
Roberto Gaudio, Auteur ;
Antonio Miglio, Auteur ;
Francesco Calomino, Auteur
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The assessment of the friction factor in open-channel flows with sediments is still an unsolved problem. For bed-load, various studies led to contrasting results, some finding that the friction factor is not affected by the sediment transport, w[...]
Article : texte imprimé
Hossein Azinfar, Auteur ;
James A. Kells, Auteur
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This study focuses on quantifying the flow resistance and the associated backwater effect of a spur dike field in an open channel flow. The work was carried out in a rigid bed flume. The model spur dikes were simulated using two-dimensional (2D)[...]
Article : texte imprimé
Yang, Shu-Qing, Auteur ;
Yu Han, Auteur ;
Nadeesha Dharmasiri, Auteur
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The underlying mechanism of flow resistance in open channels and pipelines over rough boundary is investigated. Different from Einstein's method, this work extends the principle of boundary shear stress summation in a mobile bed to the rigid bou[...]
Article : texte imprimé
Pranab K. Mohapatra, Auteur ;
M. Hanif Chaudhry, Auteur
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The discrete Fourier transform (FT) of the peak pressure frequency response (PPFR) at a downstream valve generated by the transfer matrix method is used to detect a partial pipeline blockage. The location of this blockage is detected by locating[...]
Article : texte imprimé
Thomas Euler, Auteur ;
Jurgen Herget, Auteur
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A simple process-based, analytical approach is developed and validated herein to determine the local scour at obstacles in the fluvial environment. It is based on the obstacle Reynolds and Froude numbers. Clear-water flume experiments were condu[...]
Article : texte imprimé
Bhuban Ghimire, Auteur ;
Deng, Zhi-Qiang, Auteur
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Due to the lack of a simple method for finding the shear velocity during flood events, most sediment resuspension or transport models either resort to complex numerical models requiring detailed input data or rely on uniform steady flow formula.[...]
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