Publications by Sabine Chamoun

Un outil pour évaluer l’adaptation des villes au changement climatique: la Matrice Bleue-Verte

Giovanni De Cesare, Sabine Chamoun, Loé Maire

La majorité des zones urbaines à travers le monde sont fréquemment touchées par le changement climatique, notamment à travers les effets d'îlots de chaleur ou l'augmentation de la fréquence des inondations. Les villes éponges, concept développé en Chine en ...

2023

Experimental and Numerical Study on Scour-Protection Methods in a Stilling Basin: Case Study of Chancy-Pougny Dam

Giovanni De Cesare, Erik Bollaert, Anton Schleiss, Sabine Chamoun, Davide Wüthrich

Chancy-Pougny is a run-of-river dam on the Swiss–French border constructed in the early 1920s. Since its commissioning, the operation of the four spillway gates has been responsible for a progressive erosion of the stilling basin. The future scour potentia ...

2021

Innovative methods to release fine sediments from reservoirs developed at EPFL, Switzerland

Giovanni De Cesare, Anton Schleiss, Pedro Filipe De Almeida Manso, Azin Amini, Sabine Chamoun

Electricity generation, water supply, flood protection, flow regulation and navigation are amongst the main services provided by reservoirs. Sedimentation affects the sustainability of reservoirs, by reducing their storage capacity, and increases the negat ...

2019

Improving hydropower flexibility by synergizing independently managed utilities

Giovanni De Cesare, Pedro Filipe De Almeida Manso, Steve Crettenand, Sabine Chamoun, Vincent Gaertner

Increasing the flexibility of hydropower allows operators to produce at optimal time ranges, not only dependent on the demand flow but also on the price trends. However, the possibility to improve hydropower flexibility can be hindered when assets are mana ...

Hydropower&Dams, Aqua Media International2019

Hydropeaking mitigation measures in the Swiss Upper-Rhône basin

Pedro Filipe De Almeida Manso, Steve Crettenand, Sabine Chamoun, Mathieu Pierre Guy Barnoud

Hydropower operations can cause hydropeaking particularly in the case of pumped storage systems located in mountainous regions. Due to the rapidly varying discharge conditions, hydropeaking leads to several problems such as stranding of fishes and inverteb ...

2019

Hybrid Modelling Approach to Study Scour Potential at Chancy-Pougny Dam Stilling Basin

Giovanni De Cesare, Erik Bollaert, Anton Schleiss, Sabine Chamoun, Davide Wüthrich

Chancy-Pougny is a run-of-river dam on the Swiss-French border constructed in the early 1920s. Since its inauguration, the operation of the four spillway gates was responsible for a progressive erosion of the stilling basin. Thus, a hybrid modelling was pe ...

Springer2018

Le transit des courants de turbidité, une technique pour réduire l’alluvionnement des réservoirs de barrages

Giovanni De Cesare, Anton Schleiss, Sabine Chamoun

La sédimentation des réservoirs est une problématique globale réduisant le volume d’eau disponible dans les réservoirs de barrages et induisant des pertes aux niveaux énergétique, économique et environnemental. Le transport de sédiments du bassin versant p ...

2018

Innovative methods to release fine sediments from seasonal reservoirs

Giovanni De Cesare, Anton Schleiss, Pedro Filipe De Almeida Manso, Azin Amini, Sabine Chamoun, Sebastián Guillén Ludeña

The papers present three innovative solutions for fine sediment manage- ments in seasonal reservoirs, which are at different stages of maturity. Operational reservoir stirring using jet-like inflows may facilitate sediment routing, at no addi- tional cost ...

CRC Press/Balkema2018

Numerical Modeling of turbidity currents with Ansys CFX and Telemac 3D

Giovanni De Cesare, Anton Schleiss, Sabine Chamoun

Turbidity currents may be a relevant lever to manage the accumu-lation of fine sediments in reservoirs. In this paper, we propose to show how two different numerical codes simulate the propagation of turbidity currents. Telemac 3D and Ansys CFX 17.1 solver ...

2018

Venting of turbidity currents approaching a rectangular opening on a horizontal bed

Giovanni De Cesare, Anton Schleiss, Sabine Chamoun

Taylor & Francis Ltd2018

Influence of Operational Timing on the Efficiency of Venting Turbidity Currents

Giovanni De Cesare, Anton Schleiss, Sabine Chamoun

Reservoir sedimentation is gaining growing attention as dams are aging, due to economic and environmental consequences. Venting of turbidity currents is one of many sediment management techniques, highly recommended when water is in shortage. The venting o ...

2018

Behaviour of a scour protection overlay with randomly distributed concrete prisms in plunge pools downstream of mobile barrages for exceptional operation conditions

Giovanni De Cesare, Anton Schleiss, Pedro Filipe De Almeida Manso, Sabine Chamoun, Davide Wüthrich

Uncontrolled scour is affecting multiple mobile dams. The plunge pool of the Chancy-Pougny barrage, located on the Rhone River bordering France and Switzerland, has recently been reported to develop in a potentially unfavourable direction after almost 100 ...

2018

Protection de la fosse de dissipation du barrage de Chancy-Pougny avec prismes en béton

Giovanni De Cesare, Anton Schleiss, Sabine Chamoun, Davide Wüthrich

La fosse de dissipation à l’aval du barrage de Chancy-Pougny qui fait face à une érosion progressive est l’objet de cette étude. Un modèle physique a été construit à l’échelle 1:55 afin de mieux comprendre les sources de cette érosion. Due à l’asymétrie gé ...

Société hydrotechnique de France2017

INVESTIGATION OF TURBIDITY CURRENT VENTING FOR TWO DIFFERENT RESERVOIR BED SLOPES

Giovanni De Cesare, Anton Schleiss, Sabine Chamoun

Reservoirs represent an important source of energy that should be preserved and sustained. However, the lifetime of reservoirs is being reduced due to natural processes such as sedimentation. To face this problem, different sediment mitigation techniques a ...

2017

Hybrid modelling approach to study scour potential of Chancy-Pougny dam stilling basin

Giovanni De Cesare, Erik Bollaert, Anton Schleiss, Sabine Chamoun, Davide Wüthrich

Chancy-Pougny is a run-of-river dam on the Swiss-French border constructed in the early 1920s. Since its inauguration, the operation of the four spillway gates was responsible for a progressive erosion of the stilling basin. Thus, a hybrid modelling was pe ...

2017

Investigation of venting turbidity currents in the Rudbar-Lorestan reservoir in Iran

Giovanni De Cesare, Anton Schleiss, Azin Amini, Sabine Chamoun, Sara Venuleo

Venting of turbidity currents is known as an efficient measure to prevent reservoir sedimentation and is applied in many reservoirs globally. It has several economic and ecological advantages compared with other evacuation methods. In the literature, numer ...

2017

Influence of outlet discharge on the efficiency of turbidity current venting

Sabine Chamoun

Sediment yield into reservoirs was underestimated during the design of dams in the past. As a result, today, reservoir sedimentation is endangering the sustainability of dams. Moreover, the obstruction of rivers hinders their capacity to transport sediment ...

EPFL2017

VENTING OF TURBIDITY CURRENTS: WHEN TO ACT?

Sabine Chamoun

During floods, sediments are transported from watersheds into reservoirs, slowly decreasing water volumes and this leading to economic losses. Thus, in the long term, sedimentation endangers reservoirs’ sustainability. Sediments can also block low-level hy ...

2017

Management of turbidity current venting in reservoirs under different bed slopes

Giovanni De Cesare, Anton Schleiss, Sabine Chamoun

The lifetime and efficiency of dams is endangered by the process of sedimentation. To ensure the sustainable use of reservoirs, many sediment management techniques exist, among which venting of turbidity currents. Nevertheless, a number of practical questi ...

Elsevier2017

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