Abstract
The Seine River (France) drains a catchment area of 80,000 square kilometre partly covering northern France. Despite being one of the main rivers in western Europe, few studies focused on the Seine catchment and its landscape evolution during the Quaternary. In Normandy, the middle and lower Seine valley are characterized by meandering fluvial dynamics, semi-entrenched meanders, and a succession of semi-stepped to stepped fluvial terraces over 100 m of relative height. These landforms and associated deposits reflect the long-term morphological evolution of the river during about 1 Ma. This paper aims to reconstruct the paleo-courses of the lower and middle Seine valley by means of new GIS-supported morphometric analysis of the preserved paleo-meanders, integrating a review of the former Quaternary alluvial stratigraphy. The analysis of the paleo-meanders with high-resolution digital elevation model (DEM) was transcribed into a new geomorphological map of the fluvial deposits and allowing to better understand the progressive but continuous fluvial incision as well as deposition over long distances. The river evolution is discussed regarding Quaternary uplifting, river morphometry, catchment size evolution, as well as glacio-eustatic forcing.
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