Peatland-Type Sediment Filling in Valley Bottoms at the Head of Basins in a Stream Capture Context: The Example of the Bar and Petit Morin Peatland (Grand-Est, France)

Olivier Lejeune (), Jérémy Beucher, Alain Devos, Julien Berthe, Thibaud Damien, Delphine Combaz, Nicolas Bollot and Théo Krauffel
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Olivier Lejeune: Laboratory, UR 3795 GEGENA, University of Reims Champagne-Ardenne, 57 rue Pierre Taittinger, 51571 Reims CEDEX, France
Jérémy Beucher: Laboratory, UR 3795 GEGENA, University of Reims Champagne-Ardenne, 57 rue Pierre Taittinger, 51571 Reims CEDEX, France
Alain Devos: Laboratory, UR 3795 GEGENA, University of Reims Champagne-Ardenne, 57 rue Pierre Taittinger, 51571 Reims CEDEX, France
Julien Berthe: Laboratory, UR 3795 GEGENA, University of Reims Champagne-Ardenne, 57 rue Pierre Taittinger, 51571 Reims CEDEX, France
Thibaud Damien: Service Etudes et Prospective sur le Patrimoine, Direction de l’Eau et de l’Assainissement, Communauté de Commune du Grand Reims, CS 80036, 51722 Reims CEDEX, France
Delphine Combaz: Laboratory, UR 3795 GEGENA, University of Reims Champagne-Ardenne, 57 rue Pierre Taittinger, 51571 Reims CEDEX, France
Nicolas Bollot: Laboratory, UR 3795 GEGENA, University of Reims Champagne-Ardenne, 57 rue Pierre Taittinger, 51571 Reims CEDEX, France
Théo Krauffel: Laboratory, UR 3795 GEGENA, University of Reims Champagne-Ardenne, 57 rue Pierre Taittinger, 51571 Reims CEDEX, France

Geographies, 2025, vol. 5, issue 3, 1-23

Abstract: The Quaternary saw numerous reorganizations of the hydrographic network, greatly modifying the hydrological network of these rivers. Eastern France is well known for many stream captures, described as early as the late 19th century. The oldest of these have been dated to the Middle Pleistocene. It is interesting to note, however, that these sites, located in the heart of vast limestone plateaus, have systematically become peatland zones, and understanding their functioning is fundamental to wetland restoration and renaturation programs. In addition to serving as biodiversity reservoirs, these peatlands also represent substantial carbon storage potential in the context of global climate change. Using two examples—the Marais de Saint-Gond and the Bar peatland—we propose to provide the key to understanding the origin of their sedimentary filling and the consequences of their current hydrogeological functioning.

Keywords: stream capture; peatland; renaturation; geomorphology; hydrogeology; sediment filling; radiocarbon and ESR dating (search for similar items in EconPapers)
JEL-codes: Q1 Q15 Q5 Q53 Q54 Q56 Q57 (search for similar items in EconPapers)
Date: 2025
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