Concept

Siltation

Related publications (145)

Replenishment of sediment downstream of dams: Erosion and transport processes

Large dams in Alpine valleys retain most of the sediments, especially coarse material, which is deposited in the delta of the reservoirs. The common sediment evacuation measures allow to flush only the fine sediments for example by turbidity current ventin ...

EPFL-LCH2016

Assessment of the performance of numerical modeling in reproducing a replenishment of sediments in a water-worked channel

Anton Schleiss, Carmelo Juez Jiménez, Elena Battisacco

The artificial replenishment of sediment is used as a method to re-establish sediment continuity down- stream of a dam. However, the impact of this technique on the hydraulics conditions, and resulting bed morphology, is yet to be understood. Several numer ...

Elsevier2016

Modeling sediment pulses on an armored channel

Anton Schleiss, Mário Jorge Rodrigues Pereira Da Franca, Carmelo Juez Jiménez, Elena Battisacco

Dams trap sediments in the upstream reservoir, thus the continuity in sediment transport along the river is interrupted. Several negative aspects related to the lack of sediment supply were observed downstream many dams and the artificial replenishment of ...

2016

Stability analysis of ecomorphodynamic equations

Paolo Perona, Benoît Crouzy

In order to shed light on the influence of riverbed vegetation on river morphodynamics, we perform a linear stability analysis on a minimal model of vegetation dynamics coupled with classical one- and two-dimensional Saint-Venant-Exner equations of morphod ...

Amer Geophysical Union2016

Hysteretic sediment fluxes in rainfall-driven soil erosion: Particle size effects

David Andrew Barry, Seifeddine Jomaa, Mohsen Cheraghi

A detailed laboratory study was conducted to examine the effects of particle size on hysteretic sediment transport under time-varying rainfall. A rainfall pattern composed of seven sequential stepwise varying rainfall intensities (30, 37.5, 45, 60, 45, 37. ...

American Geophysical Union2016

On the bioavailability of trace metals in surface sediments: a combined geochemical and biological approach

The bioavailability of metals was estimated in three river sediments (Sens,e, Scarpe, and DeA >> le Rivers) impacted by different levels of Cu, Cd, Pb, and Zn (Northern France). For that, a combination of geochemistry and biological responses (bacteria and ...

Springer Heidelberg2016

The influence of bottom boundary layer hydrodynamics on sediment focusing in a contaminated bay

Damien Bouffard

Understanding the dynamics and fate of particle bound contaminants is important for mitigating potential environmental, economic and health impacts linked to their presence. Vidy Bay, Lake Geneva (Switzerland), is contaminated due to the outfall and overfl ...

Springer Heidelberg2016

Properties and pozzolanic reactivity of flash calcined dredging sediments

Ruben Anton Snellings, Pawel Tadeusz Durdzinski

Dredging of ports, harbours and waterways generates vast amounts of sediments that find few applications and need to be disposed of. In the port of Antwerp, Belgium, each year 450,000 t (dry matter) of dredging sediments are mechanically dewatered and stoc ...

Elsevier Science Bv2016

Sediment replenishment: Influence of the geometrical configuration on the morphological evolution of channel-bed

Anton Schleiss, Mário Jorge Rodrigues Pereira Da Franca, Elena Battisacco

Dams trap sediment in the upstream reservoir, which may lead to river bed armoring, streambank erosion and failure, channel incision and reduction of the morphological diversity in the downstream river reaches. The replenishment of sediment is a mitigation ...

American Geophysical Union2016

Release of suspension particles from a prismatic tank by multiple jet arrangements

Anton Schleiss, Giovanni De Cesare, Jolanda Maria Isabella Jenzer Althaus

The performance of circular and linear jet arrangements on the release of suspended sediment out of a prismatic tank has been investigated. Experiments conducted are (1) without any forced jet stirring (reference case), (2) four jets arranged in a horizont ...

Elsevier2016

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