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Master Thesis

Suivis environnementaux post-effacement du barrage de Pont-Sal (Plougoumelen, Morbihan) : organisation et premier bilan

Abstract : The dam of Pont-Sal and the next-located potable water plant, in Morbihan, France, were removed in 2017. Diverse participants, without a coordinator of the monitoring program since 2017, realised numerous environmental surveys before, during and after removal. The Département du Morbihan, landowner since November 2018, needs a synthesis of the environmental monitoring done at Pont-Sal, which was the purpose of this work. We overviewed the monitoring prescribed and done before, during and after removal, showing that not all surveys were done after the prescriptions. We studied the monitoring program as well as surveys that were not included to it. We analysed adequacy of surveys to follow removal as well as first results of surveys. We observe expected evolutions (ecological continuity for some species, plant recolonization) and the remaining of some risks and questionings (channel incision, brackish water influence) three years after removal. We formulated some recommendations (scientific, technical and organisational) underlining the need to pilot the monitoring program (coordination, managing and valorisation of data, management of Pont-Sal) and to adjust surveys after the purposes of the monitoring program, to be clarified.
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https://dumas.ccsd.cnrs.fr/dumas-03033006
Contributor : Montpellier Supagro <>
Submitted on : Tuesday, December 1, 2020 - 10:34:41 AM
Last modification on : Sunday, December 6, 2020 - 3:21:31 AM

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2020_ESE_Lottigier.pdf
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  • HAL Id : dumas-03033006, version 1

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Céleste Lottigier. Suivis environnementaux post-effacement du barrage de Pont-Sal (Plougoumelen, Morbihan) : organisation et premier bilan. Agronomie. 2020. ⟨dumas-03033006⟩

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