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Giovanni De Cesare

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Publications associées (219)

Gestaltung effizienter Geschiebesammler anhand physikalischer Modellversuche mit Fallbeispiel [Design of efficient sediment traps based on physical experiments with case study]

Giovanni De Cesare, Anton Schleiss, Mário Jorge Rodrigues Pereira Da Franca, Sebastian Schwindt

In den vergangenen Jahren haben Hochwasser im Alpenraum die Notwendigkeit von Schutz-maßnahmen vor allem auch auf lokaler Ebene eindringlich in Erinnerung gerufen. Das große Geschiebetransportpotential von Wildbächen kann zu der Zerstörung ganzer Ortschaft ...

2016

Head loss coefficient through sharp-edged orifices

Giovanni De Cesare, Anton Schleiss, Cécile Münch-Alligné, Nicolas Jean François Pascal Ghislain Adam

Nowadays, high-head power plants could increase their installed power capacity for many reasons, e.g. dam heightening, increase of their peak power capacity or refurbishment with new turbines. Frequently, due to several considerations, e.g. topographical o ...

2016

Reservoir sedimentation

Giovanni De Cesare, Anton Schleiss, Mário Jorge Rodrigues Pereira Da Franca, Carmelo Juez Jiménez

Artificial water storage, originated by the construction of dams, is essential for the sustainable health and welfare of civilizations since it supplies water for human consumption, irrigation and energy production. Furthermore, dam reservoirs are used for ...

Taylor & Francis Ltd2016

Velocity profiles of turbidity currents flowing over a flat bed

Giovanni De Cesare, Anton Schleiss, Sabine Chamoun

Turbidity currents are the main source of suspended sediment transport in reservoirs and thus one of the main causes of sedimentation. One of the techniques used to avoid reservoir sedimentation is through venting of turbidity currents. In the framework of ...

2016

Study of the effects of a distanced retention basin combined with an open check dam on a physical model

Giovanni De Cesare, Anton Schleiss, Sebastian Schwindt

2016

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

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

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

Managing reservoir sedimentation by venting turbidity currents: A review

Giovanni De Cesare, Anton Schleiss, Sabine Chamoun

Reservoir sedimentation is an issue that dam operators are increasingly facing as dams are aging. Not only does it reduce a reservoir's capacity but it also affects its outlet structures such as bottom outlets and powerhouse intakes. Sedimentation may also ...

Irtces2016

Experimental investigation on turbidity current venting under restrained outflow discharges

Giovanni De Cesare, Anton Schleiss, Sabine Chamoun

Reservoir sedimentation is a worldwide problem affecting sustainable storage use as well as sediment transport downstream of dams. Various techniques are applied for sediment mitigation, among which, venting of turbidity currents. This paper reviews, discu ...

2016

Velocity profile measurements in bore waves

Giovanni De Cesare, Anton Schleiss, Michael Pfister, Davide Wüthrich

Hydrodynamic waves are an unsteady flow motion generated by rapid water level rise. In nature, such events can be found in dam-break waves, impulse waves and tsunamis. These phenomena are rare, but highly destructive. The present study is based on an exper ...

2016

Use of gas bubbles for ultrasound Doppler flow velocity profile measurement

Giovanni De Cesare, Tobias Meile

Ultrasonic velocimetry based on the Doppler shift effect accurately provides quasi-instantaneous flow fields for fluids with a sufficiently high acoustic scattering level. However, ultrasonic velocity instruments are known to perform poorly in clear water ...

Elsevier2016

Signal analysis of an actively generated cavitation bubble in pressurized pipes for detection of wall stiffness drops

Giovanni De Cesare, Anton Schleiss, Mohamed Farhat, Fadi Hachem, Alexandre Jean Pachoud

Due to the increasing production of volatile new renewable energies as solar and wind, storage hydropower plants have to operate under harsh operation conditions in order to stabilize the electricity grid. As a result, highly transient water pressures occu ...

Elsevier2016

Physical modelling optimization of a filter check dam in Switzerland

Giovanni De Cesare, Anton Schleiss, Sebastian Schwindt

After a major flood with a peak discharge of 177 m³/s in the city of Martigny (Valais, Switzerland) by the alpine river Drance in October 2000, the local authorities are strengthening efforts for the protection of the urban area. The Drance has an annual a ...

2016

Waves generated by ship convoy: Comparison of physical and numerical modeling with in-situ measurements

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

A part of the domestic waste of the city of Geneva (Switzerland) is transported with ship convoys on the Rhone River to the waste incineration station. These convoys generate waves, which partially endangers the stability of the river banks and the riparia ...

2016

Experimental assessment of head losses through elliptical and sharp-edged orifices

Giovanni De Cesare, Anton Schleiss, Nicolas Jean François Pascal Ghislain Adam

Due to the European electricity market liberalization and the appearance of other renewable electricity producers, an increase of installed peak power capacity is relevant to provide larger amount of electricity in a shorter turbine duration. When the disc ...

2016

Non-intrusive flow velocity measurements in pressurized pipe with orifice

Giovanni De Cesare, Anton Schleiss, Nicolas Jean François Pascal Ghislain Adam

Orifices are hydraulic devices producing pressure drops or head losses in pipes ways. Flow velocity measurements at the upstream of orifices allow understanding the effect of given flow field on head losses, while downstream measurements provide informatio ...

2016

Les rives lacustres et le génie biologique

Giovanni De Cesare

La Suisse est un pays de lacs avec une longueur totale de leurs rives de plus de 2000 km. Les lacs et rives façonnent le paysage. Les rives lacustres constituent des habitats quasi linéaires définissant la frontière entre espaces terrestres et lacustres, c ...

2015

Countermeasures proposed in case of the Livigno Reservoir (Swiss Alps) after the eco-accident in March 2013 satisfying safety requirements and preserving downstream aquatic fauna (Środki zaradcze zapewniające bezpieczeństwo i ochronę ichtiofauny w rzece Spöl poniżej zbiornika Livigno (Alpy Szwajcarskie) po katastrofie ekologicznej w marcu 2013 roku)

Giovanni De Cesare, Mikolaj Stanislaw Adamczyk

2015

Laboratory research: bed load guidance into sediment bypass tunnel inlet

Giovanni De Cesare, Anton Schleiss, Pedro Filipe De Almeida Manso, Milad Daneshvari

Sediment management in reservoirs situated in mountainous regions is a critical operational concern with direct implications in live storage sustainability and therefore in production revenues. The paper presents the main results of a physical model study ...

R.M. Boes ed.2015

Analysis of Ballast Transport in the Event of Overflowing of the Drainage System on High Speed Lines

Giovanni De Cesare, Tamara Ghilardi, Mona Jafarnejad Chaghooshi, Elena Battisacco

The transport of ballast caused by the overflowing of longitudinal drains is a prime example of the interactions between the railway track and its environment. In such conditions, water flowing from the platform, along with debris, may drag the ballast off ...

2015

Case study – Delta restoration at a steep river mouth

Giovanni De Cesare, Anton Schleiss, Stéphanie Joëlle André, Stéphane Christian Olivier Terrier

The mouth of the Baye de Clarens torrent in Switzerland is currently constrained by lateral training walls, sequent sills and a bridge with a low hydraulic capacity. Due to a bed load trap upstream, few sediments reach the mouth. To improve flood protectio ...

IAHR2015

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