High-speed railway lines design and durability constitute major challenges in the railway transportation field. In France, a 40-year feedback on field behaviour of ballasted tracks led to improvement of the design rules. Settlement and wear of ballast, caused by dynamic stresses at high frequency, however remains a major problem on high-speed track...
The phenomena of settlement and wear of the ballast under dynamic stresses lead to high frequencies and high maintenance costs on high-speed railway lines. Studies have shown that these settlements are linked to high accelerations produced in the ballast by the passage of high-speed trains (HST). A layer of asphalt concrete (GB) was introduced unde...
Un de nos compatriotes qui, pendant un long séjour à Rome, employait ses studieux loisirs à compulser les ar chives, Vient de nous adresser un curieux document. Il s'agit des staurotites (1), petites pierres noires en forme de croix, que l'on trouvait naguère encore aux environs de Baud et de Locminé. Il y a dix ans, un joaillier habile présenta à...
In a context of sustainable and integrated flood management, it is tempting to favor small actions in the hillslopes and non-structural measures over large hydraulic structures – which may have severe impact on the river ecosystems. However, according to the scientific literature, the effect on flood of actions in the hillslopes (land-use modificat...
The pilot Freshwater illustrate the experiences in realizing innovative technological measures for reservoir management in Brittany (France) to better manage droughts and combat water scarcity for freshwater supply.
This study focuses on an integrated hydro-meteorological forecasting system developed to forecast low flows upstream the Arzal dam and based on a lumped hydrological model. Medium-range meteorological forecasts from the ECMWF ensemble prediction system (51 scenarios up to 9 days ahead) are combined with seasonal meteorological forecasts also from E...
