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Les hommes et le bois en rivière. Représentations, pratiques et stratégies de gestion dans le cadre de l'entretien des cours d'eau.

Abstract : Given that the management of wood is carried out within the framework of watercourse maintenance, the motivation for improving the channels and riverbanks is a central issue. The diversity of view is apprehended through analysing the cognitive representations of wood in rivers.
The first part shows floating wood as an object of contention. The views expressed by watercourse stakeholders vary according to their interests and objectives. Logjams and floating wastes are managed for different purposes: risk for the riverine landowners, users and infrastructures; constraint for the productive activities; ecological benefit for the watercourse functioning. These various arguments give a bipolar structure to the informative scheme that determines the attitudes towards wood in rivers. However, in order to satisfy the social demand, legislators require watercourse maintenance, through reconciliating safety need with nature desire. Juridical discourse is normative and legitimating.
In the second part, a diachronic analysis underlines the renewal of concerns related to wood in rivers. Traditional riverside communities have intensely modified the alluvial environments, so that the storage, furniture and transport of woody debris in hydrosystems were limited. The authorities endeavour to free the waterflow to develop the navigation and floating and to mitigate the damages due to floods. Regional daily press confirms the hypothesis of a dynamic transitional stage, characterized by a growing number of logjams.
The third part reveals the heterogeneousness of cognitions related to wood in rivers and their variable contribution in each individual. A survey of environmental perception and evaluation has been achieved within the framework of experimental paradigm. Results show a consensus: the ideal river is accessible, clean and maintained. Nevertheless international comparisons highlight some striking contrasts. The collective imagination and environmental education play a significant role in maintenance, restoration and development of watercourses.
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https://tel.archives-ouvertes.fr/tel-00365849
Contributor : Yves-François Le Lay <>
Submitted on : Wednesday, March 4, 2009 - 5:33:30 PM
Last modification on : Friday, October 23, 2020 - 4:51:02 PM
Long-term archiving on: : Tuesday, June 8, 2010 - 9:18:02 PM

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  • HAL Id : tel-00365849, version 1

Citation

Yves-François Le Lay. Les hommes et le bois en rivière. Représentations, pratiques et stratégies de gestion dans le cadre de l'entretien des cours d'eau.. Géographie. Université Jean Moulin - Lyon III, 2007. Français. ⟨tel-00365849⟩

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