Jézéquel Céline auteur aut IRD text journalArticle fre text/pdf born digital access The manager of the Lavours Natural Reserve attends since the late eighties to a drying of parts of the peat bog. To better understand the ecological processes, a better understanding of the hydrological functioning is necessary. The reserve was prospected to upgrade the cartography of the drainage network and to provide a vision of the water flow dynamic. Further, the evolution of network drainage through time was explained by digitalizing historic maps available. Historical values of altitude were compared to recent data to estimate the subsidence of the peat bog. The overall results show the significant impact of recent developments on the drying of peat, whether across the marsh (ditches, valves) or larger scale (channelization of the Rhone River). Highlighting hydrological processes in the reserve can guide the manager in his actions to preserve the environment. specialized Hydrology peat bog historical data dry out drainage 082 062 no 3 h.s. 30-41 2014 0366-1326 https://www.documentation.ird.fr/hor/fdi:010065262 0366-1326 [F B010065262] https://www.documentation.ird.fr/hor/fdi:010065262 https://www.documentation.ird.fr/intranet/publi/2015/10/010065262.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2015-11-06 2017-02-10 fdi:010065262 fre