Search results for "crues"
showing 4 items of 4 documents
Climatic and anthropogenic influences on three burgundian watercourses : geoarchaelogy of crossing sites on Loire, Saône and Doubs during the Holocene
2015
A geoarchaeological study was led on four sections of the valleys of the Loire, Saône and Doubs rivers (Burgundy, France) in order to point out the factors influencing the alluvial dynamics on a multimillennial scale, and their effects on the preservation of archaeological information. Investigations started by roman and medieval remains of bridges discovered in active channels, were then carried out on larger parts of alluvial plains, and altogether allowed the evolutions of the channels during the Holocene period to be deducted. Various types of information on alluvial characteristics were crossed through time and space: ancient maps and XXth century or aerial photographs for centennial s…
Las crecidas en ramblas valencianas mediterráneas
2001
This paper takes into account the characterisation of ephemeral stream hydrology from Mediterranean environments. The heavy floods that these countries suffer are due to firstly, the physical watershed features (steep slopes, scarced vegetation cover and thin soils) and, secondly, to the intense and variable rainfall. Large quantities of precipitation fall in a matter of hours, or even minutes, over very steep catchments, causing catastrophic flash-floods, with very pointed hydrographs and short time lags. Using hydrological daily data from the Rambla de la Viuda basin and five-minute data from both Barranc de Carraixet and Rambla de Poyo basins, we have analysed the rainfall- runoff proces…
Des crues et des hommes: le cas de la Savoureuse dans le Territoire de Belfort
2000
Les crues constituent des épisodes majeurs dans la dynamique des cours d'eau. À l'échelle d'une vie humaine, elles apparaissent comme des événements exceptionnels par leur rareté, leur soudaineté et l'ampleur des volumes d'eau mis en jeu ; la brutale montée des flots s'accompagnant souvent de débordements. Dans des espaces densément peuplés, les inondations prennent alors l'allure de catastrophes provoquant des dégâts matériels et mettant en péril les vies humaines. Aussi, de tout temps, les hommes ont tenté, avec des fortunes diverses, de se préserver contre de tels risques.
Application d’un modèle conceptuel à l’analyse de la dynamique hydrométéorologique des crues dans un bassin-versant en milieu tropical humide : cas d…
2015
7 pages; International audience; Application of a conceptual model to analysis of dynamic hydrometeorological flood in a pool - side in tropicalmoist environment : the case of Mono river. The objective of this study is to analyze the dynamics of the basinhydrometeorological and distribution of incoming flood dam Nangbéto to assess the risk of flooding in the lower valley of theriver. The data used are: daily flows of Mono (m3.s-1) and Nangbéto Athiémé, evapotranspiration (mm / day, calculatedaccording to the method Oudin et al., 2005) and the average precipitation over the basin (mm / day) covering the period1988- 2010. The method of spatial interpolation of rainfall tested is that of ordin…