نبذة مختصرة : International audience ; The main goal of this paper is to present a hydro-meteorological assessment of the last three major floods observed on the small coastal watersheds of the French Riviera (October 3, 23 November 2015, 2019 and 1 December 2019). The joint analysis of precipitation data from rain gauges and of several quantitative precipitation estimates products (PANTHERE, ANTILOPE and RAINPOL) shows that the two episodes of 3 October 2015 and 1 December 2019 are characterised by very high rainfall intensities, with local accumulations of more than 100 [mm] in less than 3 hours, while the November 2019 episode was less intense and more uniform over the studied catchments. Estimated peak flows are of the same order of magnitude for the 2015 and December 2019 episodes, i.e. between 10 and 20 m3/s/km2 for the headwater catchments (drained surfaces less than 10 km2), and around 5 m3/s/km2 for the downstream catchments (drained surfaces between 10 and 60 km2). These floods are comparable to the major floods observed in recent years on a European scale, without being those that have produced the highest specific flows. This hydro-meteorological assessment shows the necessity and the interest of the instrumentation of the French Riviera coastal catchments and the added value of organising post-flood feedback in order to estimate the precipitation and flows likely to be observed in these regions prone to flash floods. Such studies are also useful to take a step back on the data and tools used for hydro-meteorological forecasting purposes on these catchments. ; L’objectif de cet article est de présenter un bilan hydro-météorologique des trois dernières crues majeures observées sur les petits bassins côtiers de la Côte d’Azur (3 octobre 2015, 23 novembre 2019 et 1er décembre 2019). L’analyse conjointe de données issues de pluviomètres et de différents produits de lames d’eau (PANTHERE, ANTILOPE et RAINPOL) montre que les deux épisodes du 3 octobre 2015 et du 1er décembre 2019 sont caractérisés par des intensités ...
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