Reservoir Sedimentation de Anton J. Schleiss

Reservoir Sedimentation

Anton J. Schleiss

Giovanni de Cesare

Mario J. Franca

Michael Pfister

Despite the mechanisms of reservoir sedimentation being well known for a long time, sustainable and preventive measures are rarely taken into consideration in the design of new reservoirs. To avoid operational problems of powerhouses, sedimentation is often treated for existing reservoirs with measures which are efficient only for a limited time.

The today's challenge of dam owners and engineers is to guarantee with adequate mitigation measures the future sustainable use of the vital reservoirs supplying water for drinking, food and energy production. Research and development is still urgently needed to identify efficient mitigation measures adapted to the main sedimentation processes involved in reservoirs.

During the seventh International Conference on Fluvial Hydraulics "River Flow 2014" at cole Polytechnique Fdrale de Lausanne (EPFL), Switzerland, scientists and professionals from all over the world addressed the challenge of reservoir sedimentation in a special session and exchanged their knowledge and experiences. Invited and selected contributions, which give an overview on the latest developments and research regarding reservoir sedimentation including case studies, are presented in this book, in the hope that they can contribute to better sustainable use of the vital reservoirs worldwide.

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Cuprins

Preface; Reservoir sedimentation; Sustainable water supply, climate change and reservoir sedimentation management: Technical and economic viability; Three-dimensional numerical modeling of flow field in rectangular shallow reservoirs; Meandering jets in shallow rectangular reservoir; Combination of 2D shallow water and full 3D numerical modeling for sediment transport in reservoirs and basins; Photometric analysis of the effect of substrates and obstacles on unconfined turbidity current flow propagation; Advances in numerical modeling of reservoir sedimentation; Innovative in-situ measurements, analysis and modeling of sediment dynamics in Chambon reservoir, France; Measurements of spatial distribution of suspended sediment concentrations in a hydropower reservoir; Case studies of reservoir sedimentation as a consequence of soil erosion; The impact of flow transformations and reservoir floor topography on reservoir deposition patterns in high energy environments; Reservoir sedimentation and erosion processes in a snow-influenced basin in Southern Spain; Suspended sediment dynamics of Ribarroja Reservoir (Ebro River, Spain); The use of Flow Assisted Sediment Transport (FAST) to remove sediment from reservoirs in Southern California, USA; Two approaches to forecasting of sedimentation in the Stare Miasto reservoir, Poland; Influence of geometry shape factor on trapping and flushing efficiencies; Flushing of coarse and graded sediments—a case study using reduced scale model; 1D modelling of fine sediments dynamics in a dam reservoir during a flushing event; Numerical analysis of sediment transport processes during a flushing event of an Alpine reservoir; Modelling suspended sediment wave dynamics of reservoir flushing; Numerical modeling of suspended sediment transport during dam flushing: From reservoir dynamic to downstream propagation; St-Egrève reservoir—modelling of flushing and evolution of the channel bed; Sequential flushing of Verbois and Chancy-Pougny reservoirs (Geneva, Switzerland); Simulation of the flushing into the dam-reservoir Paute-Cardenillo; Comprehensive numerical simulations of sediment transport and flushing of a Peruvian reservoir; Sediment bypass tunnels to mitigate reservoir sedimentation and restore sediment continuity; Modeling long term alternatives for sustainable sediment management using operational sediment transport rules; Global analysis of the sedimentation volume on Portuguese reservoirs; Reservoir sedimentation management at Gebidem Dam (Switzerland)

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