Modelling 1988 flood in Nîmes (France)

TL;DRAbstract

On October 3, 1988, a heavy rain poured 300 mm within three hours on the hills surrounding the city of Nîmes. The flow crosses the town within a few hours with a high velocity and causes heavy damages. Modelling this 1988 flood on the Richelieu locality using Rubar 20 that solves 2-D shallow water equations shows that some of the processes that were not modelled or some errors in the data may have a strong influence of results oppositely to a variation of the usual parameters of a 2-D model. Nevertheless, the limits of the flooded area that essentially depend of the main topographic features are calculated in a rather accurate way. / Le 3 octobre 1988, une forte pluie déversa 300 mm en 3 heures sur les collines entourant Nîmes. L'écoulement traverse la ville en quelques heures avec une forte vitesse et cause de lourds dommages. La modélisation de la crue de 1988 dans le quartier Richelieu par le logiciel Rubar 20 qui résout les équations de Saint Venant bidimensionnelles montre que cer

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