Programme Sélune

Selune scientific program

Understanding the mechanisms of restoration of the Selune river following the removal of two dams

Welcome to the Selune scientific program website

Your access to all information from our scientific monitoring to help you understand the restoration of the Sélune valley

The Selune scientific program began in 2012 and will continue until 2027. Its aim is to monitor the restoration of the Selune and its valley following the removal of two hydroelectric dams on its main course: the Vezins and La-Roche-Qui-Boit dams.

Browse this site to find out more about the scientific monitoring carried out in the Selune valley. Enjoy your visit!

article

23 January 2026

By: Sélune team

SISélune : update of atlantic salmon data (2012-2025)

The data on “Abundance and catches of Atlantic salmon under the IAS protocol,” reflecting the location within the watershed and abundance of juvenile Atlantic salmon in the watershed have been updated with the addition of data from the departmental federations of Manche and Ille-et-Vilaine, as well as INRAE, for the period 2012-2025.

The international group of experts on European eels (WGEEL), meeting in Rennes this year, took advantage of a day trip on the 1st of October to visit the site of the former Vezins dam.

vignette actu biofilm

The "Bioindicators" data on IBD index, biofilms, diatoms and chlorophyll-a have been updated with the addition of data from 2024.

As part of our monitoring activities, we are launching an online survey for residents and users of the Sélune Valley : What do you think of the new landscapes in the valley ?