Publications associées à Gravier (granulat)

Antidunes on steep slopes: variability of wave geometry and migration celerity

As a result of interactions between streamflow andsediment, riverbeds are seldom smooth, but depending onhydraulic and sediment transport conditions, they exhibitbedforms, which grow and migrate over time (upstreamor downstream). Morphology migration may e ...

Heide Friedrich and Karin Bryan2019

Sediment flushing downstream dams: a study on the clogging by fine sediments

Giovanni De Cesare, Christophe Ancey, Romain Maxime Dubuis

Water reservoirs used to produce electricity have an impact on the environment and durability by : • stopping the natural sediment flux • changing the flow regime downstream of the reservoirs • storing (fine) sediments that reduce the storage volume Those ...

2019

How bar generate sediment transport pulses in gravel-bed channels

Christophe Ancey, Ivan Pascal, Blaise Etienne Marceau Dhont

We ran flume experiments with constant water dis- charge and sediment feed rate at the inlet. Experi- ments were conducted over long times (typically 600 h). The bars migrated downstream intermittently, producing the most important pulses. When the bar pos ...

IAHR2018

Are Bedload Transport Pulses in Gravel Bed Rivers Created by Bar Migration or SedimentWaves?

Christophe Ancey, Blaise Etienne Marceau Dhont

Bedload transport exhibits considerable spatial and temporal variability, as reflected by large fluctuations of transport rates. Among the various mechanisms proposed for explaining this variability, bedform migration is often cited as the main cause. We t ...

2018

Bar dynamics and sediment transport pulses in gravel-bed channels.

Christophe Ancey, Blaise Etienne Marceau Dhont

Mountain rivers exhibit sediment transport rate fluctuations that often cover more than two orders of magnitude. Bedform migration is often cited as the key process that causes giant fluctuations in the sediment transport rate. To quantify the effect of be ...

EDP Sciences2018

Design optimization of permeable sediment traps for fluvial bed load transport

Anton Schleiss, Sebastian Schwindt, Mona Jafarnejad Chaghooshi, Anita Hélène Roth

Sediment traps are crucial elements for flood protection in mountain rivers with high sediment transport capacity. Existing structures often interrupt the channel connectivity. Ideally, a sediment trap should be permeable for bed load during non-hazardous ...

2018

Particle size-segregation in granular ows driven by a conveyor belt.

Christophe Ancey, Tomás Alfredo Trewhela Palacios, Kasper van der Vaart

Particle motion within the leading edge of bidisperse gravity-driven granular flows is affected by particle size segregation. Shear-induced segregation causes coarse particles to move towards the upper layers. Then, these are advected down to the tip regio ...

2018

Bedload tranport rate fluctuations in a flume with alternate bars under steady state conditions.

Christophe Ancey, Blaise Etienne Marceau Dhont

Bedload transport rate in gravel-bed rivers under steady flow conditions shows large fluctuations (Singh et al., 2009). The development, destruction and migration of bedforms (Gomez et al., 1989; Recking et al., 2009), in combination with grain sorting (Is ...

2017

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Gravier (granulat)

Antidunes on steep slopes: variability of wave geometry and migration celerity

Sediment flushing downstream dams: a study on the clogging by fine sediments

How bar generate sediment transport pulses in gravel-bed channels

Are Bedload Transport Pulses in Gravel Bed Rivers Created by Bar Migration or SedimentWaves?

Bar dynamics and sediment transport pulses in gravel-bed channels.

Design optimization of permeable sediment traps for fluvial bed load transport

Particle size-segregation in granular ows driven by a conveyor belt.

Bedload tranport rate fluctuations in a flume with alternate bars under steady state conditions.

169 Bedload tranport rate fluctuations in a flume with a lternate bars under steady state conditions.

Sediment Pulses in a Gravel-Bed Flume with Alternate Bars

Graph Chatbot

Chattez avec Graph Search

Antidunes on steep slopes: variability of wave geometry and migration celerity

Particle size-segregation in granular ows driven by a conveyor belt.

Bar dynamics and sediment transport pulses in gravel-bed channels.

169 Bedload tranport rate fluctuations in a flume with a lternate bars under steady state conditions.

Bedload tranport rate fluctuations in a flume with alternate bars under steady state conditions.

Are Bedload Transport Pulses in Gravel Bed Rivers Created by Bar Migration or SedimentWaves?

Design optimization of permeable sediment traps for fluvial bed load transport

Sediment flushing downstream dams: a study on the clogging by fine sediments

Sediment Pulses in a Gravel-Bed Flume with Alternate Bars

How bar generate sediment transport pulses in gravel-bed channels