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Development of regional flood-duration-frequency curves based on the index-flood method

Abstract : The aim of this research paper is to develop a statistical model that provides a more complete description of a basin's flood regime. The approach adopted in this paper is based on the flood-duration-frequency (QdF) analysis, which takes into account the temporal variability of floods. This approach is analogous to the intensity-duration-frequency (IdF) model commonly used for rainfall analysis. The proposed model allows QdF curves for a given basin to be estimated, while using a minimum number of parameters. This model is called "converging" model, because of the observed convergence of distributions towards small return periods. A local (at-site) model and a regional approach are developed. The regional approach uses classical concepts of regional hydrologic frequency analysis (index flood method) and can be used for basins where no streamflow data is available. Results from 158 catchments located in the provinces of Quebec and Ontario (Canada) are used to illustrate the method.
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Submitted on : Thursday, May 14, 2020 - 8:20:16 PM
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P. Javelle, T.B. Ouarda, M. Lang, B. Bobée, G. Galea, et al.. Development of regional flood-duration-frequency curves based on the index-flood method. Journal of Hydrology, Elsevier, 2002, 258 (1-4), pp.249-259. ⟨10.1016/S0022-1694(01)00577-7⟩. ⟨hal-02580325⟩



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