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Casser la connectivité hydrosédimentaire pour gérer de la ressource en sol : cas du vignoble de Mercurey (Bourgogne).

Abstract : Burgundy (France) is one of the world's most famous land for wine making and its "Climates" were inscribed on the UNESCO's World Heritage List in 2015. Yet, vineyards are known to undergo the most substantial soil loss in Europe. They have to face a serious ongoing environmental degradation risk, major financial and social loss for winemakers and local economies. This paper aims at first understanding the local erosive system, and secondly specifying the role of human practices within the sediment cascade functioning. The methodology is based on three main steps: (i) measurements of the erosion rates and sediment storages, (ii) inventory of human infrastructures that interfere with runoff (such as crop rows, storm water-basins, drainage networks, roads, etc.) and (iii) spatial analysis of structural connectivity at the catchment scale. The results highlight particularly complex hydro-sedimentary transfers, from erosion to transport and deposition of particles. They are controlled by a set of geomorphic factors (e.g. topography, soil properties, etc.) and by a set of complex anthropogenic factors. Human infrastructures have led to an increase of sediment connections on the hillslopes (through drainage systems, "v" shaped roads, etc.), to better collect sediments in artificial downstream traps. These traps imply a disconnectivity pattern at the catchment scale and significantly reorganize the sediment cascade.
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https://hal.archives-ouvertes.fr/hal-01678553
Contributor : Aurelien Christol <>
Submitted on : Tuesday, January 9, 2018 - 11:22:19 AM
Last modification on : Thursday, April 30, 2020 - 10:26:04 AM

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Mathieu Fressard, Etienne Cossart, Clément Alami, Guillaume Brun, Antoine Potot, et al.. Casser la connectivité hydrosédimentaire pour gérer de la ressource en sol : cas du vignoble de Mercurey (Bourgogne).. Géomorphologie : relief, processus, environnement, Groupe français de géomorphologie (GFG), 2018, 23 (4), pp.309 - 325. ⟨10.4000/geomorphologie.11865⟩. ⟨hal-01678553⟩

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