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Caractérisation de la croissance racinaire d'essences ligneuses implantées sur des digues fluviales

Abstract : Tree growth on earth dikes generates safety problems and reduces embankments durability. Tree root systems create erosion risks, particularly internal erosion phenomena which can be destructive on old wooded dikes. Besides the safety, management and maintenance of woody vegetation on dikes require the consideration of several other parameters, such as ecological and social functions of the riparian forest. The objectives of this study are to determine critical thresholds based on root dimensions which allow to specify management rules. These dimensions depending of age, the relation between root diameter and their age was estimated, and completed by growth speed analyses in function of species, stumps age, dike materials and management modalities. Root samples were taken from broadleaved-trees stumps extracted from Loire levee and from conifer trees stumps implanted on a mountain river dike in the Alpes-Maritimes. The studied species are poplar (Populus hybrida), locust (Robinia pseudolocust tree), oak (Quercus pubescens), negundo maple (Acer negundo), larch (Larix decidua) and scots pine (Pinus sylvestris). Roots growth speed is very dependent of the species. The ratio age / diameter of big roots seems proportional to the ratio age / diameter of tree trunk. However, numerous parameters influence this ratio, and additional works are indispensable to succeed in a reliable operational system of decision-making support.
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https://hal.inrae.fr/hal-02595626
Contributor : Migration Irstea Publications <>
Submitted on : Friday, May 15, 2020 - 8:13:48 PM
Last modification on : Saturday, October 3, 2020 - 3:28:37 AM

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  • HAL Id : hal-02595626, version 1
  • IRSTEA : PUB00032913

Citation

C. Zanetti, F. Guibal, M. Brugier, M. Vennetier, P. Mériaux, et al.. Caractérisation de la croissance racinaire d'essences ligneuses implantées sur des digues fluviales. Collection EDYTEM. Cahiers de géographie, Laboratoire EDYTEM, 2010, pp.115-122. ⟨hal-02595626⟩

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