Concept

Contrôle des alluvions

Publications associées (131)

Soil erosion under multiple time-varying rainfall events

Soil erosion is a function of many factors and process interactions. An erosion event produces changes in surface soil properties such as texture and hydraulic conductivity. These changes in turn alter the erosion response to subsequent events. Laboratory- ...

2010

Lavey Dam - Physical and numerical analysis of flow and sediment transport in the Rhone River

Anton Schleiss, Martin Peter Bieri

As several of other run-of:river hydropower plants, the hydraulic scheme of Lavey on the Rhone River in Switzerland is concerned by continuous reservoir sedimentation. To determine the flood evacuation capacity of the weir as well as the flow distribution ...

2010

Ability of One-Dimensional Hairsine-Rose Erosion Model to Predict Sediment Transport over a Soil with Significant Surface Stones

David Andrew Barry, Seifeddine Jomaa

Surface stones affect erosion rates by reducing raindrop-driven detachment and protecting the original soil against overland flow induced-hydraulic stress. Numerous studies have shown that the effect of surface stones on erosion depends on both the stone c ...

2010

Variable sediment oxygen uptake in response to dynamic forcing

Alfred Johny Wüest

Seiche-induced turbulence and the vertical distribution of dissolved oxygen above and within the sediment were analyzed to evaluate the sediment oxygen uptake rate (J(O2)), diffusive boundary layer thickness (delta(DBL)), and sediment oxic zone depth (z(ma ...

Amer Soc Limnology Oceanography2010

Hypolimnetic oxygen consumption by sediment-based reduced substances in former eutrophic lakes

Alfred Johny Wüest, Beat Mueller, Martin Schmid

We quantified the areal hypolimnetic mineralization rate (AHM; total areal hypolimnetic oxygen depletion including the formation of reduced substances) in two formerly eutrophic lakes based on 20 yr of water-column data collected during oligotrophication. ...

Amer Soc Limnology Oceanography2010

Hybrid modeling of sediment management during drawdown of Räterichsboden reservoir

Giovanni De Cesare, Milad Daneshvari

The Swiss utility Kraftwerke Oberhasli AG (KWO) currently implements "KWO plus", an upgrading program involving a large number of economical and ecological improvements of their hydropower schemes. A major project, the modification of the Handeck 2 power p ...

CRC Press, Taylor & Francis Group2010

The effect of migrating dune forms on the flow field of an alluviral river

Koen Blanckaert

The bed of an alluvial river is highly susceptible to changes during the course of its existence. Besides variations of the large scale topography and plan form of the river, smaller scale dune forms can be observed. These recurring dune forms migrate on t ...

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

Occurrence of persistent toxic substances in soils, sediments, fishes and human breast milk in southern Vietnam

Ngoc Vinh Nguyen

Global contamination and toxic effects of persistent toxic substances (PTSs) have been an emerging environmental issue and have received considerable attention during the past four decades. The rapid agricultural and industrial growths as well as the expan ...

EPFL2009

Dissolution kinetics of biogenic silica collected from the water column and sediments of three Southern California borderland basins

Janet Gordon Hering, Tian Cheng

Understanding biogenic silica (bSi) dissolution kinetics in margin environments is important in assessing the global silicon cycle, a cycle closely linked to the global carbon cycle. This understanding is also essential to answer the question of whether bS ...

2009

Two-phase hydrodynamic and sediment transport modeling of wave-generated sheet flow

David Andrew Barry, Roham Bakhtyar

This numerical investigation was carried out to advance mechanistic understanding of sediment transport under sheet flow conditions. An Euler-Euler coupled two-phase flow model was developed to simulate fluid-sediment oscillatory sheet flow. Since the conc ...

Elsevier2009

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