Sur l'hydrogéomorphologie d'un espace à forte anthropisation urbaine : le site de Nı̂mes (Languedoc, France) du Pléistocène supérieur à l'Antiquité ; impacts postérieurs

Abstract

Hydrogeomorphological, archaeological and geohistorical integrated studies of the very urbanised Nı̂mes area attest of piedmont slopes and torrential alluvial fan existence from the beginning of digging of the Vistre valley since the end of the ancient Pleistocene. The urbanisation is situated on top of a major superior Pleistocene–Holocene alluvial fan. This fan existed during the old Antiquity, and has been widely truncated by the anthropisation during the High Empire. This fan is connected to other little ones, and becomes a colluvial–alluvial fan landform connected to the present flood plain of the Vistre River. It is still functioning now, as during the recent flash flood disaster of 3 October 1988.