Premier risque naturel en France, les inondations peuvent entraîner des pertes humaines et provoquer d'importants dégâts matériels. Parmi elles, les crues soudaines causées par des pluies très fortes enregistrées en très peu de temps restent encore difficiles à anticiper et à gérer. La méthode AIGA présentée dans ce article est un outil destiné à m...
Si l'on dispose en France de réseaux de mesure pluviométriques et hydrométriques conséquents, il reste difficile d'estimer des valeurs extrêmes de pluie ou de débit sur l'ensemble du territoire, les séries d'observation étant le plus souvent trop courtes pour donner directement une information sur les événements extrêmes. Après un tour d'horizon su...
Published in E3S Web of Conferences
Over the last 25 years, flash floods in the South of France have killed almost 250 people. The protection of prone populations is a priority for the French government. It is also a goal of the 2007 European flood directive. However, no accurate database exists gathering the fatalities due to floods in France. Fatalities are supposed to be rare and ...
Published in E3S Web of Conferences
Risk Flood protection involves works which reduce the hydraulic hazard in protected areas in terms of frequency, duration, water level, water velocity or flood arrival time. These works are parts of protection systems. In this paper, we discuss and compare three structure-based solutions that contribute to flood protection but seem to oppose one an...
Published in E3S Web of Conferences
Occurring at small temporal and spatial scales, flash floods (FF) can cause severe economic damages and human losses. To better anticipate such events and mitigate their impacts, the French Ministry in charge of Ecology has decided to set up a national FF warning system over the French territory. This automated system will be run by the SCHAPI, the...
The 36-month-long DIDRO project seeks to bring existing developments on remote sensing by drone on the scope of the project: dikes surveys as routine inspection or in relation to a flood crisis. Drone offers a new complementary means of surveying which can map broad areas efficiently while being more flexible and easier to operate than other airbor...
Forecast uncertainty is a twofold issue, as it constitutes both an added value and a challenge for the forecaster and the user of the forecasts. Many authors have demonstrated the added (economic) value of probabilistic forecasts over deterministic forecasts for a diversity of activities in the water sector (e.g. flood protection, hydroelectric pow...
Probabilistic hydro-meteorological forecasts have over the last decades been used more frequently to communicate forecast uncertainty. This uncertainty is twofold, as it constitutes both an added value and a challenge for the forecaster and the user of the forecasts. Many authors have demonstrated the added (economic) value of probabilistic over de...
Extreme events are rarely observed, so their analysis is generally based on observations of more frequent values. The relevance of flood frequency analysis (FFA) method depends on its capability to estimate the frequency of extreme values with reasonable accuracy using extrapolation. A FFA method based on stochastic simulation of flood event is ass...
Les progrès scientifiques et techniques pourraient laisser croire que les connaissances et données existantes sont suffisantes pour comprendre et modéliser tous les processus physiques qui régissent les phénomènes naturels sur Terre. Or, la prévision des crues demeure une mission difficile, avec des marges d'amélioration importantes, et dont les fo...
