Abstract
As many questions arise from the effect of climate change on floods in France, a French research program is devoted to the study of national trend and variations in French floods : peak flow, flood number, flood volume, flood duration ~ The present report gives : 1/ an inventory of statistical tests for the detection on trend and variations; 2/ an international bibliography on regional trend analyses on flood data series; 3/ some cases studies on French data.A second phase of this project will focus on the systematic analysis of a set of one hundred long discharges series in France, in order to give assessment on the observed trends and variations on flood and drought regime in France.