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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 ...
Suite à des études hydrologies récentes, le barrage de Gage II en France révèle un déficit de capacité d'évacuation des crues. Il a donc été décidé de construire un évacuateur de creue complémentaire en rive droit du barrage. Cet ouvrage est composé d'un P ...
A new monitoring approach for detecting, locating, and quantifying structurally weak reaches of steel-lined pressure tunnels and shafts is presented. These reaches arise from local deterioration of the backfill concrete and the rock mass surrounding the li ...
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 ...
The effect of local drop of wall stiffness in pressurized waterways on the pressure wave speed and the wave attenuation during transients is investigated experimentally. A new signal-processing procedure to identify the presence of a weak reach is introduc ...
The Milibach River between Hasliberg-Reuti and Meiringen agglomerations in Switzerland has a limited hydraulic capacity leading to frequent flooding. During the 2005 flood event, large populated areas were inundated and damages exceeding many millions of S ...
Avec demande croissante de I'énergie de pointe, les centrales hydro-électriques à accumulation opèrent de plus en plus d'une manière abrupte pour assurer avec efficacité, flexibilité et sécurité I'équilibre entre la production et la demande d'électricité. ...
Le torrent du Milibach présente une capacité hydraulique insuffisante conduisant à des débordements fréquents dans le village de Meiringen notamment. Ce manque de capacité est dû essentiellement à l’accumulation de sédiments dans le lit du cours d’eau pend ...
The local deterioration of the mechanical properties of steel-lined pressure shafts and tunnels induces a decrease of the celerity and an increase of the energy attenuation of water hammer waves. This deterioration may arise from the weakening of the backf ...
Due to high peak energy demands, existing hydropower plants operate nowadays under rough conditions to regulate the discharge and power with relatively fast and repeated opening and closing of turbines and pumps. The local deterioration of the mechanical p ...