Analyse régionale des crues journalières de la province de Québec

The regional analysis of floods is a valuable tool in design and management of hydraulic structures such as dams, dikes, and spillways, especially for ungauged sites. Three homogeneous regions have been established through the use of a discordancy test and a homogeneity test on a total of 136 natural or quasi-natural rivers within the territory of the province of Quebec. It is then shown that the generalized standardized regional distribution of extreme values, adjusted by the L-moments, adequately describes the daily floods within each of the three regions. The quality of the adjustment of the regional distributions has successfully been verified through an extensive test applied to each site. Procedures for the use of the results of the regional analysis are also suggested.Key words: flood, regional analysis, homogeneity, province of Quebec.