Dépôt numérique
RECHERCHER

Spring flood analysis using the flood-duration-frequency approach: application to the provinces of Quebec and Ontario, Canada.

Javelle, Pierre; Ouarda, Taha B. M. J.; Bobée, Bernard (2003). Spring flood analysis using the flood-duration-frequency approach: application to the provinces of Quebec and Ontario, Canada. Hydrological Processes , vol. 17 , nº 18. p. 3717-3736. DOI: 10.1002/hyp.1349.

Ce document n'est pas hébergé sur EspaceINRS.

Résumé

Most often, flood frequency analysis describes a flood event only by its peak. However, the true flood severity is also defined by its volume and duration. This paper presents an approach allowing flood events to be considered in a more complete way: the flood‐duration–frequency (QdF) approach. In a similar manner to the rainfall intensity–duration–frequency analysis, averaged discharges are computed over different fixed durations d. For each duration a frequency distribution of maximum averaged discharges is studied. Finally, a continuous formulation is fitted, as a function of the return period T and the duration d over which discharges have been averaged. The proposed model has been tested for 169 catchments in the provinces of Quebec and Ontario, Canada. The shapes of the QdF curves enabled us to define different types of flood behaviour and to identify the corresponding geographic regions. This mapping of flood behaviour was the basis for the delineation of seven homogeneous geographical regions, containing catchments having the same hydrological behaviour as is required for regional flood frequency analysis.

Type de document: Article
Mots-clés libres: spring flood; frequency analysis; duration; regime; intensity; regional estimation
Centre: Centre Eau Terre Environnement
Date de dépôt: 08 janv. 2021 14:05
Dernière modification: 08 janv. 2021 14:05
URI: http://espace.inrs.ca/id/eprint/11072

Actions (Identification requise)

Modifier la notice Modifier la notice