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Marcelo Leite Ribeiro

Publications associées (22)

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Morphodynamic changes in a channel confluence due to local tributary widening

Marcelo Leite Ribeiro

The morphodynamic changes in a confluence zone due to local tributary widening were experimentally investigated in a set-up representative of regulated piedmont confluences. A reference configuration with a constant tributary width of 0.15 m is compared to ...

2011

Flow and sediment dynamics in bed discordant channel confluences

Anton Schleiss, Koen Blanckaert, Marcelo Leite Ribeiro

Confluences between small steep tributaries with dominant supply of poorly sorted sediment and larger main channels with dominant flow supply, which are characterized by a pronounced bed discordance, have not yet been considered in the literature. The hydr ...

Tsinghua University Press2011

Coupled spillway devices and energy dissipation system at St-Marc (France)

Anton Schleiss, Marcelo Leite Ribeiro

The physical modeling tests for the rehabilitation of St-Marc Dam with a PKW are presented. A particular focus is put on the energy dissipation downstream from the PKW. The adopted solution is a leaned “ski-jump gutter” placed at the contact line between t ...

CRC Press, Taylor & Francis Group2011

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The Discussers would like to congratulate the Authors for their interesting work concerning the flow characteristics in channel confluences, performed by means of three-dimensional numerical simulations considering rectangular crosssections with smooth bed ...

National Research Council Canada2011

Experimental parametric study for hydraulic design of PKWs

Anton Schleiss, Marcelo Leite Ribeiro

The implementation of a new type of labyrinth spillway, called PKW (Piano Key Weir) reveals as a performing alternative for increasing the overflow capacity of existing dams. The optimal hydraulic design of such structure is however not obvious due to the ...

CRC Press, Taylor & Francis Group2011

Piano Key Weir description involves a lot of geometrical parameters which designations are now well defined. A naming convention has been developed to enhance exchanges and cooperation between the numerous developers. This nomenclature was presented and di ...

CRC Press, Taylor & Francis Group2011

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In the aim of assessing the potential of tributary widening with respect to river rehabilitation in fluvial systems, attention is focused on the effects of tributary widening on the morphodynamic processes of confluence zones. Systematic tests were perform ...

2011

Elargissement local de l’affluent dans une zone de confluence

Anton Schleiss, Koen Blanckaert, Marcelo Leite Ribeiro

Les amémagements des cours d'eau ont été responsables d'un considérable affaiblissement de la valeur écologique de systèmes fluviaux dans les régions alpines d'Europe. Dans ce contexte, la morphodynamique des confluences alpines améagées est étudiée expéri ...

2011

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This paper investigates the morphologic impacts of the widening of tributaries in confluence zones by means of systematic hydraulic tests performed in a confluent laboratory flume. The confluent channels are connected with an angle of 90° and the main chan ...

Ed. Dittrich, Koll, Aeberle & Geisenhainer (eds)2010

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La réhabilitation des barrages existants impose généralement une augmentation de leur capacité d’évacuation en crue. Dans de nombreuses situations, le PK-Weir (Piano Key Weir) offre à cet égard une solution compacte et efficace. La conception et la réalisa ...

SHF2009