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Giovanni De Cesare

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Publications associées (219)

Sediment Evacuation from Reservoirs through Intakes by Jet-Induced Flow

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

Reservoir sedimentation is considered as a sustainability problem. A concept getting down to the root of the cause was developed and tested in laboratory experiments. The idea is to maintain sediment in suspension, i.e., avoiding its settling near the dam ...

American Society of Civil Engineers2015

Analyse de risques pour les circulations ferroviaires d’un débordement de drainage sur ligne à grande vitesse (LGV)

Giovanni De Cesare, Tamara Ghilardi

RÉSUMÉ. – Suite à un incident survenu en 2000 sur la Ligne à Grande Vitesse (LGV) Paris‑Lyon sur la commune de Sarry dû à un emportement de ballast par débordement des eaux du drainage longitudinal de la plateforme ferroviaire, la SNCF a engagé en tant que ...

Edp Sciences S A2015

Wave-reducing Stern Flap on Ship Convoys to Protect Riverbanks

Giovanni De Cesare, Anton Schleiss, Robin Amacher, Théodora Cohen Liechti, Michael Pfister

Inland navigable waterways are significant in cargo transport and leisure activities. In parallel, these channels and rivers often suffer from the ship traffic, as the generated waves may damage waterway banks, along with their riparian fauna. As a consequ ...

Amer Soc Naval Eng Inc2015

Psamathe – Alternatives Konzept der Entsanderspülung

Giovanni De Cesare, Cécile Münch-Alligné, Milad Daneshvari, Sebastian Schwindt

Die vollständige Spülung von Dufour-Sandfängen geht einher mit erheblichen Verlusten des Triebwassers, wodurch der Anlagenertrag geschmälert wird. Die Effizienz eines neuartigen Spülsystems wird durch numerische Simulationen anhand einer Fallstudie eines D ...

Springer Vieweg-Springer Fachmedien Wiesbaden Gmbh2014

Design of a bed load and driftwood filtering dam, analysis of the phenomena and hydraulic design

Giovanni De Cesare

Flood protection often calls on to the realization of retention works for bed load as well as wood and debris flow. Certain relatively recent arrangements did not perform according to their intended function, what shows the complexity of the design and the ...

CRC Press/Balkema2014

Design of a diversion structure for the management of residual risks using physical model tests

Giovanni De Cesare, Antoine Magnollay, Raphaël Sprenger

As revitalization and protection against floods are essential in our time, the town of Delémont in Switzerland has set up a major project named “Delémont Marée Basse”. Part of the project, the residual risk plans to be managed by a lateral overflow bypassi ...

CRC Press/Balkema2014

Reactivation of Klingnau reservoir sidearm: Numerical simulation of sediment release downstream

Giovanni De Cesare, Philippe Heller, Anton Schleiss, Azin Amini

The Klingnau reservoir, situated in north Switzerland, suffers from sedimentation in its left enlargement. The dam is placed in the Aare River about 1 km upstream of its confluence with the Rhine. Due to natural conservation and flood protection reasons, i ...

CRC Press/Balkema2014

Comprehensive numerical simulations of sediment transport and flushing of a Peruvian reservoir

Giovanni De Cesare, Philippe Heller, Anton Schleiss, Azin Amini

Numerical modeling of sediment transport in reservoirs, especially for sudden events such as flushing, is still a challenging research topic. In the present study, sediment transport and sediment flushing are simulated for a Peruvian reservoir. Situated in ...

CRC Press/Balkema2014

Optimization of a Shared Tailrace Channel of Two Pumped-Storage Plants by Physical and Numerical Modeling

Giovanni De Cesare, Martin Peter Bieri, Stéphane Christian Olivier Terrier, Sylvain Candolfi

Pump and turbine operations lead to head losses in the tailrace channel. Pumping discharge may be limited due to potential air entrainment into the pump shaft when the downstream reservoir is at its lowest level and the head losses are too high. Regarding ...

2014

Continuous Long-Term Observation of Suspended Sediment Transport between Two Pumped-Storage Reservoirs

Giovanni De Cesare, Anton Schleiss, Michael Müller

Transport of suspended sediment between the two reservoirs of a pumped-storage plant in Switzerland was monitored over an 8-month period. A turbidity probe was installed on the upstream end of the pressure shaft, in which real-time monitoring was ensured b ...

Asce-Amer Soc Civil Engineers2014

Flow field UVP measurements of a Y-shape outlet structure

Giovanni De Cesare, Alexandre Jean Pachoud

Y-shape outlet structures are used to release the turbine water into a reservoir. Classical design oftenuses a Y-shape over a certain length and with a specific opening angle. Depending on the geometry,especially in turbine mode, significant undesired flow ...

2014

Surge Wave Propagation in a Common Tailrace Channel for Two Large Pumped-Storage Plants

Giovanni De Cesare, Anton Schleiss, Martin Peter Bieri, Stéphane Christian Olivier Terrier

Sudden starting and stopping of turbines and pumps lead to highly unsteady flow in tailrace channels of hydropower plants (HPP). Submergence of Pelton turbines and air entrainment in pumps due to surge waves must be avoided by technical measures. The exist ...

Asce-Amer Soc Civil Engineers2014

Anregungen zur Qualitätssicherung in der 3-D-numerischen Modellierung mit FLOW-3D

Giovanni De Cesare

FLOW-3D ist eine leistungsfähige 3-D-numerische Strömungssimulationssoftware für Freispiegelabflüsse. Das strukturierte und entlang der Koordinatenachsen ausgerichtete Berechnungsnetz stellt eine Besonderheit der Software dar. Dadurch ergeben sich zusätzli ...

2014

Modelling of plunge pool scour evolution in non-cohesive sediments

Giovanni De Cesare, Gaël Epely Chauvin, Sebastian Schwindt

Turbulences in liquids caused by jets can be of interest for numerous applications. For one, it concerns flood spillway structures within civil engineering but also is key in any area where turbulent mixing is present. The numerical simulations of jets tha ...

2014

Influence of pumped-storage operation on reservoir sedimentation

Giovanni De Cesare, Anton Schleiss, Michael Müller

In Europe, renewable energy sources are rapidly growing but are often linked to a highly volatile production, as for solar and wind energy. Pumped-storage plants have become very important since they can ensure grid stability and safe power supply at any m ...

2013

Resilient Rivers - Interdisciplinary Research on Refugia, Connectivity and Stepping Stones

Giovanni De Cesare

The interdisciplinary project Resilient Rivers links research in hydraulic engineering and ecology to explore processes and to evaluate measures related to river restoration. The partners from four different Swiss research institutions together with the ...

2013

Scale effects related to the rating curve of cylindrically crested Piano Key weirs

Giovanni De Cesare, Anton Schleiss, Michael Pfister, Elena Battisacco

Hydraulic scale effects on physical Piano Key weir (PKW) models were so far rarely discussed in literature, even though almost all prototypes are model-tested before construction. In parallel, physical weir models are generally known to include significant ...

Erpicum et al., CRC Press, Boca Raton2013

Hydraulic design of the diaphragm’s orifice at the entrance of the surge shaft of FMHL pumped-storage power plant

Giovanni De Cesare, Christophe Nicolet, Rafael Xavier Meriade Duarte, Fadi Hachem

The surge tank located at the upstream head of penstocks and shafts of hydropower plants is an effective measure to protect the headrace tunnels against high pressure fluctuations. It reflects the transient pressure waves that are generated by the variatio ...

TPU2013

Entlandung von Stauseen über Triebwasserfassungen durch Aufwirbeln der Feinsedimente mit Fass

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

Die Stauraumverlandung gefährdet weltweit die nachhaltige Nutzung der für die Wasser- und Energieversorgung wichtigen Stausseen. Im Rahmen einer Forschungsarbeit wurde eine neue effiziente Methode zur kontinuierlichen Austragung von Feinsedimenten aus dem ...

2011

Physical Model Experiments on Reservoir Sedimentation

Giovanni De Cesare, Anton Schleiss

The challenge of understanding and managing of turbidity currents in reservoirs ...

Taylor & Francis Ltd2010

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