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Journal of hydraulic research |
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Ajouter le résultat dans votre panierIncipient velocity for partially submerged vehicles in floodwaters / Caiwen Shu in Journal of hydraulic research, Vol. 49 N° 6 (Novembre/Décembre 2011)
in Journal of hydraulic research > Vol. 49 N° 6 (Novembre/Décembre 2011) . - pp. 709-717
Titre : Incipient velocity for partially submerged vehicles in floodwaters Type de document : texte imprimé Auteurs : Caiwen Shu, Auteur ; Junqiang Xia, Auteur ; Roger A. Falconer, Auteur Année de publication : 2012 Article en page(s) : pp. 709-717 Note générale : Hydraulique Langues : Anglais (eng) Mots-clés : Flooded vehicles Incipient velocity Model experiment Scale ratio Similarity principle Urban flooding Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : Vehicles parking in urban areas can often cause various hazards to people and buildings when they are swept away by flash floods. Therefore, it is necessary to investigate the appropriate criteria of vehicle stability in floodwaters. Different forces acting on partially submerged vehicles have been analysed, with a mechanics-based formula of incipient velocity being derived. Experiments were conducted to obtain the conditions of water depth and corresponding velocity at the threshold of vehicle instability for three typical types of die-cast model vehicles. The data were used to determine two key parameters. Incipient velocities for partially submerged prototype vehicles in floodwaters were estimated using two different approaches, including the predictions using the scale ratios and computations based on the formula. These critical conditions using the scale ratios compare well with the calculations using the derived formula, and the derived formula was also validated by the visually-observed data of swept vehicles in flash floods.
DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.616318 [article] Incipient velocity for partially submerged vehicles in floodwaters [texte imprimé] / Caiwen Shu, Auteur ; Junqiang Xia, Auteur ; Roger A. Falconer, Auteur . - 2012 . - pp. 709-717.
Hydraulique
Langues : Anglais (eng)
in Journal of hydraulic research > Vol. 49 N° 6 (Novembre/Décembre 2011) . - pp. 709-717
Mots-clés : Flooded vehicles Incipient velocity Model experiment Scale ratio Similarity principle Urban flooding Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : Vehicles parking in urban areas can often cause various hazards to people and buildings when they are swept away by flash floods. Therefore, it is necessary to investigate the appropriate criteria of vehicle stability in floodwaters. Different forces acting on partially submerged vehicles have been analysed, with a mechanics-based formula of incipient velocity being derived. Experiments were conducted to obtain the conditions of water depth and corresponding velocity at the threshold of vehicle instability for three typical types of die-cast model vehicles. The data were used to determine two key parameters. Incipient velocities for partially submerged prototype vehicles in floodwaters were estimated using two different approaches, including the predictions using the scale ratios and computations based on the formula. These critical conditions using the scale ratios compare well with the calculations using the derived formula, and the derived formula was also validated by the visually-observed data of swept vehicles in flash floods.
DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.616318
in Journal of hydraulic research > Vol. 49 N° 6 (Novembre/Décembre 2011) . - pp. 718-727
Titre : Regions of bars, meandering and braiding in da Silva and Yalin's plan Type de document : texte imprimé Auteurs : Habib Ahmari, Auteur ; Ana Maria Ferreira Da Silva, Auteur Année de publication : 2012 Article en page(s) : pp. 718-727 Note générale : Hydraulique Langues : Anglais (eng) Mots-clés : Alternate bar Braiding Meandering Multiple bar Occurrence criteria Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : The existence region plan of alternate bars, multiple bars, meandering and braiding, introduced by da Silva in 1991 and presented in its most recent form by Yalin and da Silva in the 2001 IAHR monograph Fluvial Processes, is updated and revised. For this purpose, the plan is extended by adding available laboratory and field data from the recent literature, as well as earlier data that only recently became available to the authors. Data from two series of laboratory runs conducted by the authors are also included. These were conducted to fill in a gap in the existing data, pertinent to the definition of the existence region of alternate bars. This work led to a revision to the location of the boundary lines of the existence regions of both alternate bars and meanders. An attempt was also made to reveal the existence regions of different types of multiple bars.
DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.614518 [article] Regions of bars, meandering and braiding in da Silva and Yalin's plan [texte imprimé] / Habib Ahmari, Auteur ; Ana Maria Ferreira Da Silva, Auteur . - 2012 . - pp. 718-727.
Hydraulique
Langues : Anglais (eng)
in Journal of hydraulic research > Vol. 49 N° 6 (Novembre/Décembre 2011) . - pp. 718-727
Mots-clés : Alternate bar Braiding Meandering Multiple bar Occurrence criteria Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : The existence region plan of alternate bars, multiple bars, meandering and braiding, introduced by da Silva in 1991 and presented in its most recent form by Yalin and da Silva in the 2001 IAHR monograph Fluvial Processes, is updated and revised. For this purpose, the plan is extended by adding available laboratory and field data from the recent literature, as well as earlier data that only recently became available to the authors. Data from two series of laboratory runs conducted by the authors are also included. These were conducted to fill in a gap in the existing data, pertinent to the definition of the existence region of alternate bars. This work led to a revision to the location of the boundary lines of the existence regions of both alternate bars and meanders. An attempt was also made to reveal the existence regions of different types of multiple bars.
DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.614518
in Journal of hydraulic research > Vol. 49 N° 6 (Novembre/Décembre 2011) . - pp. 728-735
Titre : Permeability effects of single groin on flow characteristics Type de document : texte imprimé Auteurs : Joongu Kang, Auteur ; Hongkoo Yeo, Auteur ; Sungjung Kim, Auteur Année de publication : 2012 Article en page(s) : pp. 728-735 Note générale : Hydraulique Langues : Anglais (eng) Mots-clés : Flow separation Impermeable groin Permeable groin Pile groin Recirculation zone Triangular-shaped groin Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : The results of an experimental study on the flow characteristics around a groin structure of various geometries and permeabilities are presented. The impermeable rectangular, the permeable pile, and the triangular-shaped groins are considered. The velocity fields were observed using large-scale particle image velocimetry, whereas the maximum velocities were measured using an acoustic Doppler velocimeter. An increased velocity at the groin tip and a broad range of the recirculation zones were observed for the impermeable rectangular groin. For the permeable pile groin, the velocity at the groin tip, the vortex strength, and the scale of the recirculation zone tended to decrease as the openings between the piles increased. Also, the triangular-shaped groin formed narrower and longer recirculation zones compared with the permeable pile groin of identical cross-sectional flow area. These quantitative findings on the flow patterns for groins of various geometries and permeabilities are practically important to design and evaluate their performance in field applications.
DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.614520 [article] Permeability effects of single groin on flow characteristics [texte imprimé] / Joongu Kang, Auteur ; Hongkoo Yeo, Auteur ; Sungjung Kim, Auteur . - 2012 . - pp. 728-735.
Hydraulique
Langues : Anglais (eng)
in Journal of hydraulic research > Vol. 49 N° 6 (Novembre/Décembre 2011) . - pp. 728-735
Mots-clés : Flow separation Impermeable groin Permeable groin Pile groin Recirculation zone Triangular-shaped groin Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : The results of an experimental study on the flow characteristics around a groin structure of various geometries and permeabilities are presented. The impermeable rectangular, the permeable pile, and the triangular-shaped groins are considered. The velocity fields were observed using large-scale particle image velocimetry, whereas the maximum velocities were measured using an acoustic Doppler velocimeter. An increased velocity at the groin tip and a broad range of the recirculation zones were observed for the impermeable rectangular groin. For the permeable pile groin, the velocity at the groin tip, the vortex strength, and the scale of the recirculation zone tended to decrease as the openings between the piles increased. Also, the triangular-shaped groin formed narrower and longer recirculation zones compared with the permeable pile groin of identical cross-sectional flow area. These quantitative findings on the flow patterns for groins of various geometries and permeabilities are practically important to design and evaluate their performance in field applications.
DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.614520
in Journal of hydraulic research > Vol. 49 N° 6 (Novembre/Décembre 2011) . - pp. 736-743
Titre : Coherent structures around isolated spur dikes at various approach flow angles Type de document : texte imprimé Auteurs : Mete Koken, Auteur Année de publication : 2012 Article en page(s) : pp. 736-743 Note générale : Hydraulique Langues : Anglais (eng) Mots-clés : Coherent structures Computational fluid dynamics Horseshoe vortex Scour Spur dike Turbulent flow Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : The turbulent flow structures around an isolated spur dike located at three different approach flow angles are investigated. Detached eddy simulation is used at a channel Reynolds number of 45,000. Experimental velocity measurements were also conducted using acoustic Doppler velocimetry for validating the simulations. It is found that the size and orientation of the horseshoe vortex system change considerably with the approach flow angle. The main necklace vortex is largest in size and most coherent for 90°. Within this orientation it has larger amplitude bimodal oscillations compared to the 60° and 120° cases. A new scour mechanism is defined for the 60° case which is expected to generate more scour upstream of the spur dike. The possible scour area around the spur dike is found to be the maximum in the 90° case which is roughly by 15% larger than that of the 120° case.
DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.616316 [article] Coherent structures around isolated spur dikes at various approach flow angles [texte imprimé] / Mete Koken, Auteur . - 2012 . - pp. 736-743.
Hydraulique
Langues : Anglais (eng)
in Journal of hydraulic research > Vol. 49 N° 6 (Novembre/Décembre 2011) . - pp. 736-743
Mots-clés : Coherent structures Computational fluid dynamics Horseshoe vortex Scour Spur dike Turbulent flow Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : The turbulent flow structures around an isolated spur dike located at three different approach flow angles are investigated. Detached eddy simulation is used at a channel Reynolds number of 45,000. Experimental velocity measurements were also conducted using acoustic Doppler velocimetry for validating the simulations. It is found that the size and orientation of the horseshoe vortex system change considerably with the approach flow angle. The main necklace vortex is largest in size and most coherent for 90°. Within this orientation it has larger amplitude bimodal oscillations compared to the 60° and 120° cases. A new scour mechanism is defined for the 60° case which is expected to generate more scour upstream of the spur dike. The possible scour area around the spur dike is found to be the maximum in the 90° case which is roughly by 15% larger than that of the 120° case.
DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.616316
in Journal of hydraulic research > Vol. 49 N° 6 (Novembre/Décembre 2011) . - pp. 744-749
Titre : Time-dependent clear-water scour for submerged bridge flows Type de document : texte imprimé Auteurs : Junke Guo, Auteur Année de publication : 2012 Article en page(s) : pp. 744-749 Note générale : Hydraulique Langues : Anglais (eng) Mots-clés : Bridge scour Clear-water scour Pressure flow Real-time monitoring Submerged flow Time-dependent scour Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : The current design of bridge foundations based on equilibrium scour depths is much larger than the real maximum scour depth since peak flood periods are often too short to reach equilibrium conditions. Based on a tested hypothesis on the time rate of scour, this research presents a power-exponential equation for the time-dependent clear-water scour depth including a nonzero initial condition for submerged bridge flows. For zero initial conditions, the proposed equation is reduced to a log or power law during the initial phase and an exponential decay near the equilibrium condition. The proposed equation reduces design depths according to design flows and their peak periods, translating into significant savings in the construction of bridge foundations. With a real-time monitoring system, the proposed equation also predicts time-series scour depths during floods, helping bridge managers formulate timely corrective strategies.
DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.616364 [article] Time-dependent clear-water scour for submerged bridge flows [texte imprimé] / Junke Guo, Auteur . - 2012 . - pp. 744-749.
Hydraulique
Langues : Anglais (eng)
in Journal of hydraulic research > Vol. 49 N° 6 (Novembre/Décembre 2011) . - pp. 744-749
Mots-clés : Bridge scour Clear-water scour Pressure flow Real-time monitoring Submerged flow Time-dependent scour Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : The current design of bridge foundations based on equilibrium scour depths is much larger than the real maximum scour depth since peak flood periods are often too short to reach equilibrium conditions. Based on a tested hypothesis on the time rate of scour, this research presents a power-exponential equation for the time-dependent clear-water scour depth including a nonzero initial condition for submerged bridge flows. For zero initial conditions, the proposed equation is reduced to a log or power law during the initial phase and an exponential decay near the equilibrium condition. The proposed equation reduces design depths according to design flows and their peak periods, translating into significant savings in the construction of bridge foundations. With a real-time monitoring system, the proposed equation also predicts time-series scour depths during floods, helping bridge managers formulate timely corrective strategies.
DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.616364
in Journal of hydraulic research > Vol. 49 N° 6 (Novembre/Décembre 2011) . - pp. 750-756
Titre : Prediction of rock block stability and scour depth in plunge pools Type de document : texte imprimé Auteurs : Pooyan Asadollahi, Auteur ; Tonon, Fulvio, Auteur ; Matteo P.E.A. Federspiel, Auteur Année de publication : 2012 Article en page(s) : pp. 750-756 Note générale : Hydraulique Langues : Anglais (eng) Mots-clés : Dam safety Fracture Rock Scour Spillway Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : Block Stability in 3 Dimensions (BS3D) is an incremental-iterative algorithm and code to analyse general failure modes of rock blocks subjected to generic forces, including non-conservative forces such as water pressure. This algorithm is used to investigate the effect of high-velocity water jet impact on the stability of single rock blocks in plunge pools. After reviewing the literature, an approach is proposed to estimate the dynamic water pressure fluctuations at the pool bottom and in rock fractures. The approach is validated using an experimental study. In addition, by comparing the results of these analyses to additional experimental results, a scour threshold is introduced for plunge pools. It is found that if the maximum upward block displacement is larger than a quarter of the block height, the block is most probably removed from its mould. The proposed approach and threshold are validated using case histories that indicate excellent match between prediction and observed scour depth.
DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.618055 [article] Prediction of rock block stability and scour depth in plunge pools [texte imprimé] / Pooyan Asadollahi, Auteur ; Tonon, Fulvio, Auteur ; Matteo P.E.A. Federspiel, Auteur . - 2012 . - pp. 750-756.
Hydraulique
Langues : Anglais (eng)
in Journal of hydraulic research > Vol. 49 N° 6 (Novembre/Décembre 2011) . - pp. 750-756
Mots-clés : Dam safety Fracture Rock Scour Spillway Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : Block Stability in 3 Dimensions (BS3D) is an incremental-iterative algorithm and code to analyse general failure modes of rock blocks subjected to generic forces, including non-conservative forces such as water pressure. This algorithm is used to investigate the effect of high-velocity water jet impact on the stability of single rock blocks in plunge pools. After reviewing the literature, an approach is proposed to estimate the dynamic water pressure fluctuations at the pool bottom and in rock fractures. The approach is validated using an experimental study. In addition, by comparing the results of these analyses to additional experimental results, a scour threshold is introduced for plunge pools. It is found that if the maximum upward block displacement is larger than a quarter of the block height, the block is most probably removed from its mould. The proposed approach and threshold are validated using case histories that indicate excellent match between prediction and observed scour depth.
DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.618055
in Journal of hydraulic research > Vol. 49 N° 6 (Novembre/Décembre 2011) . - pp. 757-765
Titre : Near-bed particle motion over transitionally-rough bed Type de document : texte imprimé Auteurs : Bhaskar Ramesh, Auteur ; Umesh C. Kothyari, Auteur ; Krishnan Murugesan, Auteur Année de publication : 2012 Article en page(s) : pp. 757-765 Note générale : Hydraulique Langues : Anglais (eng) Mots-clés : Particle motion Rolling Saltation Sediment motion Shear stress Transitionally-rough bed Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : The motion of sediment particles over a transitionally-rough bed is studied experimentally using a real-time high-speed imaging system. Vertical distributions of the instantaneous flow velocities were measured using acoustic Doppler velocimetry. The sediment saltation trajectories and the associated velocity components were deciphered from the high-speed images using digital image processing techniques. Sediments of different sizes and specific weights were used for experimentation. Particles moving in both the rolling and the saltation regimes were tested. Stochastic deviations of the particle velocity, the particle acceleration and the angle of velocity vector orientation during its motion due to particle interactions with flow and the channel bed are quantified. The angle distributions and the acceleration fluctuations are approximately bell-shaped. Using the experimental data, a generalized single relation for particle velocity is proposed for saltation and rolling sediments. The results of particle motion on movable-rough and fixed-rough beds available in the literature are also included for comparison. The data presented herein are useful for stochastic modelling of bed-load transport.
DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.620369 [article] Near-bed particle motion over transitionally-rough bed [texte imprimé] / Bhaskar Ramesh, Auteur ; Umesh C. Kothyari, Auteur ; Krishnan Murugesan, Auteur . - 2012 . - pp. 757-765.
Hydraulique
Langues : Anglais (eng)
in Journal of hydraulic research > Vol. 49 N° 6 (Novembre/Décembre 2011) . - pp. 757-765
Mots-clés : Particle motion Rolling Saltation Sediment motion Shear stress Transitionally-rough bed Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : The motion of sediment particles over a transitionally-rough bed is studied experimentally using a real-time high-speed imaging system. Vertical distributions of the instantaneous flow velocities were measured using acoustic Doppler velocimetry. The sediment saltation trajectories and the associated velocity components were deciphered from the high-speed images using digital image processing techniques. Sediments of different sizes and specific weights were used for experimentation. Particles moving in both the rolling and the saltation regimes were tested. Stochastic deviations of the particle velocity, the particle acceleration and the angle of velocity vector orientation during its motion due to particle interactions with flow and the channel bed are quantified. The angle distributions and the acceleration fluctuations are approximately bell-shaped. Using the experimental data, a generalized single relation for particle velocity is proposed for saltation and rolling sediments. The results of particle motion on movable-rough and fixed-rough beds available in the literature are also included for comparison. The data presented herein are useful for stochastic modelling of bed-load transport.
DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.620369
in Journal of hydraulic research > Vol. 49 N° 6 (Novembre/Décembre 2011) . - pp. 766-774
Titre : Mechanical analysis for emergent vegetation in flowing fluids Type de document : texte imprimé Auteurs : Chen, Li, Auteur ; Stone, Mark C., Auteur ; Kumud Acharya, Auteur Année de publication : 2012 Article en page(s) : pp. 766-774 Note générale : Hydraulique Langues : Anglais (eng) Mots-clés : Drag force Ecohydraulics Hydraulic roughness Stress Vegetation bending Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : Vegetation plays an important role in stream processes and management efforts. However, the description of mechanical behaviours of vegetation–fluid interaction requires an improved understanding of the underlying physics and of the methods used for investigating this interaction. The objective of this research was to develop a method for describing vegetation mechanics in flowing fluids. This was accomplished by outlining methods for describing vegetation responses to flow under rigid and bending conditions for simple vegetation elements. The results of the theoretical analyses provide insight into influences of vegetation biomechanical properties to force distributions, bending behaviour, and potential vegetation rupture locations and conditions. The approach can be used to estimate hydraulic conditions for vegetation failure and flow resistance caused by vegetation, especially for flexible species. Although the techniques developed here are based on simplifying assumptions, the present analysis provides a foundation for future development for submerged vegetation and complex vegetation clusters.
DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.621359 [article] Mechanical analysis for emergent vegetation in flowing fluids [texte imprimé] / Chen, Li, Auteur ; Stone, Mark C., Auteur ; Kumud Acharya, Auteur . - 2012 . - pp. 766-774.
Hydraulique
Langues : Anglais (eng)
in Journal of hydraulic research > Vol. 49 N° 6 (Novembre/Décembre 2011) . - pp. 766-774
Mots-clés : Drag force Ecohydraulics Hydraulic roughness Stress Vegetation bending Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : Vegetation plays an important role in stream processes and management efforts. However, the description of mechanical behaviours of vegetation–fluid interaction requires an improved understanding of the underlying physics and of the methods used for investigating this interaction. The objective of this research was to develop a method for describing vegetation mechanics in flowing fluids. This was accomplished by outlining methods for describing vegetation responses to flow under rigid and bending conditions for simple vegetation elements. The results of the theoretical analyses provide insight into influences of vegetation biomechanical properties to force distributions, bending behaviour, and potential vegetation rupture locations and conditions. The approach can be used to estimate hydraulic conditions for vegetation failure and flow resistance caused by vegetation, especially for flexible species. Although the techniques developed here are based on simplifying assumptions, the present analysis provides a foundation for future development for submerged vegetation and complex vegetation clusters.
DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.621359
in Journal of hydraulic research > Vol. 49 N° 6 (Novembre/Décembre 2011) . - pp. 775-783
Titre : Vorticity equation for the streamline and the velocity profile Type de document : texte imprimé Auteurs : Oscar Castro-Orgaz, Auteur ; Willi H. Hager, Auteur Année de publication : 2012 Article en page(s) : pp. 775-783 Note générale : Hydraulique Langues : Anglais (eng) Mots-clés : Boundary layer Free overfall Transitional flow Undular hydraulic jump Vorticity Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : Water flow over short hydraulic transitions is usually modelled by the irrotational flow theory, for which the energy head remains constant over the entire flow domain. Velocity and pressure distributions are then obtained based on the stream and potential functions of the flow net. However, experimental evidence may dictate non-uniform energy profiles resulting either from vorticity, viscous effects, or both. For rapidly-varied flows, Hunter Rouse (1906–1996) proposed in the early 1930s the inviscid Euler flow equations. Most of the current curvilinear flow models, however, resort to irrotational flow. In this work, a generalized curvilinear method for real fluid flow is proposed. Based on the streamline vorticity equation, a practical approach is presented for inviscid, rotational flow. The model is verified by data pertaining to the free overfall and further tested with data on viscous flow in undular jumps, thereby resulting in good agreement.
DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.624687 [article] Vorticity equation for the streamline and the velocity profile [texte imprimé] / Oscar Castro-Orgaz, Auteur ; Willi H. Hager, Auteur . - 2012 . - pp. 775-783.
Hydraulique
Langues : Anglais (eng)
in Journal of hydraulic research > Vol. 49 N° 6 (Novembre/Décembre 2011) . - pp. 775-783
Mots-clés : Boundary layer Free overfall Transitional flow Undular hydraulic jump Vorticity Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : Water flow over short hydraulic transitions is usually modelled by the irrotational flow theory, for which the energy head remains constant over the entire flow domain. Velocity and pressure distributions are then obtained based on the stream and potential functions of the flow net. However, experimental evidence may dictate non-uniform energy profiles resulting either from vorticity, viscous effects, or both. For rapidly-varied flows, Hunter Rouse (1906–1996) proposed in the early 1930s the inviscid Euler flow equations. Most of the current curvilinear flow models, however, resort to irrotational flow. In this work, a generalized curvilinear method for real fluid flow is proposed. Based on the streamline vorticity equation, a practical approach is presented for inviscid, rotational flow. The model is verified by data pertaining to the free overfall and further tested with data on viscous flow in undular jumps, thereby resulting in good agreement.
DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.624687
in Journal of hydraulic research > Vol. 49 N° 6 (Novembre/Décembre 2011) . - pp. 784-790
Titre : Entropy approach for 2D velocity distribution in open-channel flow Type de document : texte imprimé Auteurs : Gustavo Marini, Auteur ; Giuseppe De Martino, Auteur ; Nicola Fontana, Auteur Année de publication : 2012 Article en page(s) : pp. 784-790 Note générale : Hydraulique Langues : Anglais (eng) Mots-clés : Entropy Flow measurement Open-channel flow Shannon entropy Streamflow Velocity distribution Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : In this paper, considering time-averaged velocity as a random variable, two-dimensional (2D) velocity distributions in open-channel flow have been derived based on the Shannon entropy concept and the principle of maximum entropy. The velocity distributions so derived have limited practical use, since they contain too many parameters that need to be experimentally calibrated and hence are not convenient to apply. This work develops a new entropy-based approach for deriving a 2D velocity distribution in open-channel flow, thereby investigating a rectangular geometric domain. The derived distribution is parsimonious, and the values determined using the proposed distribution are found to be in good agreement with the experimentally-measured velocity values.
DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.635889 [article] Entropy approach for 2D velocity distribution in open-channel flow [texte imprimé] / Gustavo Marini, Auteur ; Giuseppe De Martino, Auteur ; Nicola Fontana, Auteur . - 2012 . - pp. 784-790.
Hydraulique
Langues : Anglais (eng)
in Journal of hydraulic research > Vol. 49 N° 6 (Novembre/Décembre 2011) . - pp. 784-790
Mots-clés : Entropy Flow measurement Open-channel flow Shannon entropy Streamflow Velocity distribution Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : In this paper, considering time-averaged velocity as a random variable, two-dimensional (2D) velocity distributions in open-channel flow have been derived based on the Shannon entropy concept and the principle of maximum entropy. The velocity distributions so derived have limited practical use, since they contain too many parameters that need to be experimentally calibrated and hence are not convenient to apply. This work develops a new entropy-based approach for deriving a 2D velocity distribution in open-channel flow, thereby investigating a rectangular geometric domain. The derived distribution is parsimonious, and the values determined using the proposed distribution are found to be in good agreement with the experimentally-measured velocity values.
DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.635889
in Journal of hydraulic research > Vol. 49 N° 6 (Novembre/Décembre 2011) . - pp. 791-798
Titre : Benthic and interfacial mixing in a strongly-stratified estuary Type de document : texte imprimé Auteurs : Arthur Simanjuntak, Auteur ; Imberger, Jörg, Auteur ; Keisuke Nakayama, Auteur Année de publication : 2012 Article en page(s) : pp. 791-798 Note générale : Hydraulique Langues : Anglais (eng) Mots-clés : Down-gradient flux Estuary Richardson number Shear Turbulent closure Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : Tone River is a shallow, tidal estuary with a controllable upstream freshwater discharge via a barrage. The mixing characteristics in the benthic and interfacial regions of the Tone River estuary were investigated during a time window of maximum freshwater discharge and high shear, using temperature and velocity microstructure measurements. Although the production of turbulent kinetic energy from mean shear was high throughout the water column, the intermittency of both up- and down-gradient buoyancy fluxes resulted in negligible net down-gradient mixing. These opposing fluxes were incorporated into a turbulent closure scheme by using the concept of percentage down-gradient flux. A comparison of vertical diffusivity from two alternative closures suggests that the stratification imposed a length scale limitation on the vertical turbulent excursions that proved crucial for the transition region between the benthic and interfacial regions; it is argued that a Richardson-number based closure is both conceptually and practically adequate to represent the effect of length-scale limitation and percentage down-gradient flux.
DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.607304 [article] Benthic and interfacial mixing in a strongly-stratified estuary [texte imprimé] / Arthur Simanjuntak, Auteur ; Imberger, Jörg, Auteur ; Keisuke Nakayama, Auteur . - 2012 . - pp. 791-798.
Hydraulique
Langues : Anglais (eng)
in Journal of hydraulic research > Vol. 49 N° 6 (Novembre/Décembre 2011) . - pp. 791-798
Mots-clés : Down-gradient flux Estuary Richardson number Shear Turbulent closure Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : Tone River is a shallow, tidal estuary with a controllable upstream freshwater discharge via a barrage. The mixing characteristics in the benthic and interfacial regions of the Tone River estuary were investigated during a time window of maximum freshwater discharge and high shear, using temperature and velocity microstructure measurements. Although the production of turbulent kinetic energy from mean shear was high throughout the water column, the intermittency of both up- and down-gradient buoyancy fluxes resulted in negligible net down-gradient mixing. These opposing fluxes were incorporated into a turbulent closure scheme by using the concept of percentage down-gradient flux. A comparison of vertical diffusivity from two alternative closures suggests that the stratification imposed a length scale limitation on the vertical turbulent excursions that proved crucial for the transition region between the benthic and interfacial regions; it is argued that a Richardson-number based closure is both conceptually and practically adequate to represent the effect of length-scale limitation and percentage down-gradient flux.
DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.607304
in Journal of hydraulic research > Vol. 49 N° 6 (Novembre/Décembre 2011) . - pp. 799-803
Titre : Rigid-plug elastic-water model for transient pipe flow with entrapped air pocket Type de document : texte imprimé Auteurs : Deyou Liu, Auteur ; Ling Zhou, Auteur ; Bryan Karney, Auteur Année de publication : 2012 Article en page(s) : pp. 799-803 Note générale : Hydraulique Langues : Anglais (eng) Mots-clés : Air pocket Entrapped air Mathematical model Pipe system Pressure surge Transient flow Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : Pressure transients in a rapidly-filling pipe with an entrapped air pocket are investigated analytically. A rigid-plug elastic-water model is developed by applying elastic-water hammer to the majority of the water columns while applying rigid-water analysis to a small portion near the air–water interface. The proposed model is validated by the full elastic-water model and experimental data. It effectively avoids the interpolation error of the method of characteristics reducing its complexity when tracking the air–water interface. Moreover, the current model has the same accuracy as the full elastic-water model.
DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.621740 [article] Rigid-plug elastic-water model for transient pipe flow with entrapped air pocket [texte imprimé] / Deyou Liu, Auteur ; Ling Zhou, Auteur ; Bryan Karney, Auteur . - 2012 . - pp. 799-803.
Hydraulique
Langues : Anglais (eng)
in Journal of hydraulic research > Vol. 49 N° 6 (Novembre/Décembre 2011) . - pp. 799-803
Mots-clés : Air pocket Entrapped air Mathematical model Pipe system Pressure surge Transient flow Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : Pressure transients in a rapidly-filling pipe with an entrapped air pocket are investigated analytically. A rigid-plug elastic-water model is developed by applying elastic-water hammer to the majority of the water columns while applying rigid-water analysis to a small portion near the air–water interface. The proposed model is validated by the full elastic-water model and experimental data. It effectively avoids the interpolation error of the method of characteristics reducing its complexity when tracking the air–water interface. Moreover, the current model has the same accuracy as the full elastic-water model.
DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.621740
in Journal of hydraulic research > Vol. 49 N° 6 (Novembre/Décembre 2011) . - pp. 804-808
Titre : Vortex dropshaft retrofitting: case of Naples city (Italy) Type de document : texte imprimé Auteurs : Giuseppe Del Giudice, Auteur ; Corrado Gisonni, Auteur Année de publication : 2012 Article en page(s) : pp. 804-808 Note générale : Hydraulique Langues : Anglais (eng) Mots-clés : Drop structure Hydraulic failure Sewer hydraulics Supercritical flow Vortex shaft Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : This work describes the main hydraulic features of vortex dropshafts along with some examples of their mis-designs and consequent malfunction. Laboratory experiments were conducted to test the hydraulic performance of subcritical vortex intakes using supercritical approach flow design basis. The purposes of these drop structures are to: (i) convey the storm runoff towards the sea through the existing sewer system located at lower elevations and (ii) by-pass insufficient sewers. The proper operation of these structures is crucial to prevent flooding and to guarantee the urban safety. This issue is particularly relevant for the sewer system of Naples (Italy), which is strongly constrained by its hilly landscape. Several drop structures were realized to connect the modern urban drainage system to the early sewer mains located at the sea level. This work intends to highlight practical issues to enhance the existing vortex dropshafts, with possible applications to other cases similar to the Neapolitan context.
DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.622148 [article] Vortex dropshaft retrofitting: case of Naples city (Italy) [texte imprimé] / Giuseppe Del Giudice, Auteur ; Corrado Gisonni, Auteur . - 2012 . - pp. 804-808.
Hydraulique
Langues : Anglais (eng)
in Journal of hydraulic research > Vol. 49 N° 6 (Novembre/Décembre 2011) . - pp. 804-808
Mots-clés : Drop structure Hydraulic failure Sewer hydraulics Supercritical flow Vortex shaft Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : This work describes the main hydraulic features of vortex dropshafts along with some examples of their mis-designs and consequent malfunction. Laboratory experiments were conducted to test the hydraulic performance of subcritical vortex intakes using supercritical approach flow design basis. The purposes of these drop structures are to: (i) convey the storm runoff towards the sea through the existing sewer system located at lower elevations and (ii) by-pass insufficient sewers. The proper operation of these structures is crucial to prevent flooding and to guarantee the urban safety. This issue is particularly relevant for the sewer system of Naples (Italy), which is strongly constrained by its hilly landscape. Several drop structures were realized to connect the modern urban drainage system to the early sewer mains located at the sea level. This work intends to highlight practical issues to enhance the existing vortex dropshafts, with possible applications to other cases similar to the Neapolitan context.
DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.622148
in Journal of hydraulic research > Vol. 49 N° 6 (Novembre/Décembre 2011) . - pp. 809-813
Titre : Protective spur dike for scour mitigation of existing spur dikes Type de document : texte imprimé Auteurs : Hojat Karamia, Auteur ; Abdollah Ardeshir, Auteur ; Kourosh Behzadian, Auteur Année de publication : 2012 Article en page(s) : pp. 809-813 Note générale : Hydraulique Langues : Anglais (eng) Mots-clés : Experimentation Flow pattern Open channel Protective spur dike Scour countermeasure Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : To alleviate the scour depth around a series of existing spur dikes (SDs), a protective SD located upstream of the first was experimentally investigated. To determine the optimal design parameters, various values, lengths, angles and the spacing of a protective SDs were experimentally tested under different clear-water conditions in a straight river reach and a fixed flow depth. To investigate the behaviour of the flow field around the SDs, acoustic Doppler velocimeter was used to measure instantaneous velocity components on a rough rigid bed. The results indicate that a properly designed protective SD is able to decrease the average of the maximum scour depth around the main SDs. The optimum design parameters of a protective SD are recommended for each length for a particular experiment.
DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.625166 [article] Protective spur dike for scour mitigation of existing spur dikes [texte imprimé] / Hojat Karamia, Auteur ; Abdollah Ardeshir, Auteur ; Kourosh Behzadian, Auteur . - 2012 . - pp. 809-813.
Hydraulique
Langues : Anglais (eng)
in Journal of hydraulic research > Vol. 49 N° 6 (Novembre/Décembre 2011) . - pp. 809-813
Mots-clés : Experimentation Flow pattern Open channel Protective spur dike Scour countermeasure Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : To alleviate the scour depth around a series of existing spur dikes (SDs), a protective SD located upstream of the first was experimentally investigated. To determine the optimal design parameters, various values, lengths, angles and the spacing of a protective SDs were experimentally tested under different clear-water conditions in a straight river reach and a fixed flow depth. To investigate the behaviour of the flow field around the SDs, acoustic Doppler velocimeter was used to measure instantaneous velocity components on a rough rigid bed. The results indicate that a properly designed protective SD is able to decrease the average of the maximum scour depth around the main SDs. The optimum design parameters of a protective SD are recommended for each length for a particular experiment.
DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.625166
in Journal of hydraulic research > Vol. 49 N° 6 (Novembre/Décembre 2011) . - pp. 814-817
Titre : Adoption of Manning's equation to 1D non-Darcy flow problems Type de document : texte imprimé Auteurs : Mohammad Sedghi-Asl, Auteur ; Hassan Rahimi, Auteur Année de publication : 2012 Article en page(s) : pp. 814-817 Note générale : Hydraulique Langues : Anglais (eng) Mots-clés : Friction factor Manning's equation Non-Darcy flow Porous media Rockfill materials Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : In this paper, the concept of Darcy–Weisbach's friction loss in pipe flows is employed and combined with Manning's widely used formula in open-channel flow problems to obtain a new relation for flow in porous rockfill media. A new formula to determine Manning's roughness coefficient of rockfill materials is presented based on the flow and grain characteristics and validated using new experimental data. The results confirm the applicability of Manning's formula for the hydraulically rough regime.
DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.629911 [article] Adoption of Manning's equation to 1D non-Darcy flow problems [texte imprimé] / Mohammad Sedghi-Asl, Auteur ; Hassan Rahimi, Auteur . - 2012 . - pp. 814-817.
Hydraulique
Langues : Anglais (eng)
in Journal of hydraulic research > Vol. 49 N° 6 (Novembre/Décembre 2011) . - pp. 814-817
Mots-clés : Friction factor Manning's equation Non-Darcy flow Porous media Rockfill materials Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : In this paper, the concept of Darcy–Weisbach's friction loss in pipe flows is employed and combined with Manning's widely used formula in open-channel flow problems to obtain a new relation for flow in porous rockfill media. A new formula to determine Manning's roughness coefficient of rockfill materials is presented based on the flow and grain characteristics and validated using new experimental data. The results confirm the applicability of Manning's formula for the hydraulically rough regime.
DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.629911
in Journal of hydraulic research > Vol. 49 N° 6 (Novembre/Décembre 2011) . - pp. 818-820
Titre : Discharge characteristics of skew weirs Type de document : texte imprimé Auteurs : Swamee, Prabhata K., Auteur ; Chandra Shekhar P. Ojha, Auteur ; Talib Mansoor, Auteur Année de publication : 2012 Article en page(s) : pp. 818-820 Note générale : Hydraulique Langues : Anglais (eng) Mots-clés : Curved weir Discharge coefficient Discharge measurement Open channel Skew weir Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : Skew weirs are used for reducing afflux while passing a certain discharge. Herein, the discharge characteristics of a sharp-crested skew weir are explored. The concept of elementary discharge coefficient is utilized for predicting the discharge. Based on experimentation, an equation for the discharge coefficient of skew weirs is determined as a function of weir head to weir height and the weir angle relative to the channel axis. The discharge over skew weirs is well predicted.
DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.630896 [article] Discharge characteristics of skew weirs [texte imprimé] / Swamee, Prabhata K., Auteur ; Chandra Shekhar P. Ojha, Auteur ; Talib Mansoor, Auteur . - 2012 . - pp. 818-820.
Hydraulique
Langues : Anglais (eng)
in Journal of hydraulic research > Vol. 49 N° 6 (Novembre/Décembre 2011) . - pp. 818-820
Mots-clés : Curved weir Discharge coefficient Discharge measurement Open channel Skew weir Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : Skew weirs are used for reducing afflux while passing a certain discharge. Herein, the discharge characteristics of a sharp-crested skew weir are explored. The concept of elementary discharge coefficient is utilized for predicting the discharge. Based on experimentation, an equation for the discharge coefficient of skew weirs is determined as a function of weir head to weir height and the weir angle relative to the channel axis. The discharge over skew weirs is well predicted.
DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.630896
in Journal of hydraulic research > Vol. 49 N° 6 (Novembre/Décembre 2011) . - pp. 821-823
Titre : Steady free-surface flow in porous media : generalized Dupuit–Fawer equations Type de document : texte imprimé Auteurs : Carmine Di Nucci, Auteur Année de publication : 2012 Article en page(s) : pp. 821-823 Note générale : Hydraulique Langues : Anglais (eng) Mots-clés : Free surface flow Porous media Dupuit–Fawer equations Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.607309 [article] Steady free-surface flow in porous media : generalized Dupuit–Fawer equations [texte imprimé] / Carmine Di Nucci, Auteur . - 2012 . - pp. 821-823.
Hydraulique
Langues : Anglais (eng)
in Journal of hydraulic research > Vol. 49 N° 6 (Novembre/Décembre 2011) . - pp. 821-823
Mots-clés : Free surface flow Porous media Dupuit–Fawer equations Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.607309
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