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L'évolution de la basse vallée de l'Argent-Double pendant l'époque historique

Abstract : In the low valley of the Argent-Double river, studies were undertaken in order to define the recent evolution of sedimentation rates as well as the functional floodplain as on the embankment. Methodology employed is based on the presence of many structures (aqueducs, siphon, the Canal du Midi) and a Roman road on this sector. 137Cs was used in order to specify the recent evolution of the high water bed. This research made it possible to note a great stability of the forms and formations constituting the embankment (Würm terrace, glacis). On the other hand, a great variability of the annual average sedimentation rates could be observed in the high water bed. This variability results in a weakness of hydrosedimentary activity during the Little Ice Age and in rates reaching more than 5 c m per year for the present-day. In detail, the weakest accumulations are observed in the XVIIIe century with only 5 cm of 1681 to 1783. For the end of the Little Ice Age, it settles only 1,53 m from 1651 to 1956 against 1,42 m from 1956 to 2004.
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Contributor : Jean-Louis Ballais <>
Submitted on : Tuesday, August 1, 2017 - 2:07:50 PM
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  • HAL Id : hal-01571011, version 1

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Florent Delorme, Virginie Delorme-Laurent, Jean-Louis Ballais, Philippe Bonte. L'évolution de la basse vallée de l'Argent-Double pendant l'époque historique. Ol' Man River - Geo-archaeological aspects of rivers and river plains, Archaeological Reports Ghent University, Sep 2006, Gand, Belgique. pp.5, 281-296. ⟨hal-01571011⟩

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