Rainfall-frequency curves with a recent urban dense rainfall measurement network

International audienceUrban areas are becoming better equipped with dense rainfall measurement networks and there is a growing demand for local specific rainfall-frequency curves. However, the time series from such networks are generally short, often less than 20 yr, and spatially correlated (1 station per 5 or 10 km 2) even at small time steps, usually less than 1 h. It is therefore necessary to use a method which takes the available information as much as possible into account in order to minimize the confidence intervals of the estimates. The French Department of Seine-Saint-Denis, covering an area of 236 km 2 in the eastern part of the Paris area, manages a 17-year-old rainfall data-base which contains about 250 station-years of checked data. These data are considered within a discussion of the issues of homogeneity of correlated time-series on an urban area, and the amount of information such a network includes at small time steps. Local rainfall frequency curves are developed with a regional approach and put into a non-dimensional form. They are compared with those obtained from a long-term series (more than 30 yr) available in Paris and with the curves obtained by the station-year method on 21 independent stations in the north of France

Quelle maîtrise publique des eaux pluviales urbaines en France ?

Colloque avec actes et comité de lecture. internationale.International audienceL’article s’inscrit dans la perspective de la mise en cause des réseaux comme solution de gestion et de contrôle des eaux pluviales urbaines, sous l’effet des critiques techniques mais aussi des attentes de solutions durables par les habitants. Il commence par dresser l’état des modalités en cours de gestion des eaux pluviales et de la place des modes publics et privés dans cette gestion. Au-delà des obstacles politiques et financiers que peuvent rencontrer les solutions décentralisées de récupération des eaux de pluie pour la réutilisation par le particulier et celles de stockage/infiltration des eaux ruisselées, l’ambition de cet article est d’apprécier les recompositions déjà entamées et à venir des services publics dans leurs missions et leur mode de fonctionnement, en articulation avec l’ensemble des acteurs, usagers et habitants

Characterization of site conditions (soil class, VS30, velocity profiles) for 33 stations from the French permanent accelerometric network (RAP) using surface-wave methods

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