Skip to Main content Skip to Navigation
Conference papers

New Sélune River (Normandy, France) margins following large dam removal: ecological restoration perspectives considering the successional vegetation dynamics of alluvial deposits

Abstract : The present study is part of the scientific monitoring related to the removal, expected by 2021,of the two Sélune River dams (Normandy, France)–of 36m and 16m respectively. It has been conducted between 2015 and2017. In order to make sediment management easier during the emptying of the lake, the water level of the impoundment was stabilised at its usual lowest level since the spring of 2015.It has been slowly reduced since the spring of 2017 to conduct these operations until the completion of the emptying which is planned for the summer of 2018, allowing theflood plain to progressively go back to its normal course. The dismantlement of theVezins Dam will beginin the spring of 2019. Hectares of muds a real ready colonized by vegetation and ,the original riverbed was reappearing in the upper partsin 2017. The aim of this study is to analyse the vegetation successional stages of dewatered sediment banksin the context of the dam removal. It focuses on three axis: i) the dynamics of thecolonizing species at the scale of the emptied lake, ii) the spatial patterns of the process and iii) the new river margin sectors that reappeared in 2017. We will predict thevegetation’s ability to passively restore the riparian area of the Sélune River. The fast colonization process, the extremely rapid evolution of successional stages and the spatial succession dynamics observed are treated.
Complete list of metadatas

Cited literature [3 references]  Display  Hide  Download

https://hal-agrocampus-ouest.archives-ouvertes.fr/hal-02476053
Contributor : Catherine Cliquet <>
Submitted on : Wednesday, February 12, 2020 - 2:36:31 PM
Last modification on : Friday, September 18, 2020 - 2:34:34 PM

Licence


Distributed under a Creative Commons Attribution - NonCommercial - ShareAlike 4.0 International License

Identifiers

  • HAL Id : hal-02476053, version 1
  • PRODINRA : 465141

Citation

C. Ravot, Marianne Laslier, Isabelle Muller, Laurence Hubert-Moy, Simon Dufour, et al.. New Sélune River (Normandy, France) margins following large dam removal: ecological restoration perspectives considering the successional vegetation dynamics of alluvial deposits. I.S Rivers Recherches et actions au service des fleuves et grandes rivières, Jun 2018, Lyon (France), France. ⟨hal-02476053⟩

Share

Metrics

Record views

71

Files downloads

21