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At the occasion of the end of the research program Reppaval (lien vers présentation), an international workshop was organized at the University of Poitiers (4-5 December 2015) in order to discuss social, cultural and political issues of dam and weir removal operations in Europe (Spain, Sweden, France) and North America (Canada, USA). Dam (and weir) removal projects, which are the most widespread river restoration operation in north-western France, are in fact also the most conflicting due to the fact ecological continuity reestablishment often involves landscape changes and activity transformations … The aim of this international workshop is to compare and share experiences of ecological continuity restoration in different cultural, institutional and political contexts.Different communications were presented during this international workshop called “Dam removal: New environments and new landscapes? Social, cultural and political issues” associating physical and social geography points of views:DAM REMOVAL: DEVELOPING A CRITICAL PHYSICAL GEOGRAPHY APPROACH TO LINK SOCIO‐POLITICAL ISSUES TO BIOPHYSICAL PROCESSESSimon DUFOUR (Université Rennes 2, UMR LETG), Anne‐Julia ROLLET (Université Caen, UMR LETG), Margot CHAPUIS (Université Nice, UMR ESPACE), Mireille PROVANSAL (Université Aix Marseille, UMR CEREGE), Romain CAPANNI (Université Aix Marseille, UMR CEREGE) THE “SOCIAL” SCIENCE OF US DAM REMOVAL: HOW DIFFERENT INSTITUTIONAL AND CULTURAL ENVIRONMENTS INFLUENCE DAM REMOVALS AND ASSOCIATED SCIENTIFIC STUDIESGordon E. GRANT, Sarah LEWIS, John ESLER (College of Earth, Ocean and Atmospheric Sciences, Oregon State University, Corvallis, OR, USA)RETHINKING THE VALUE OF HYDROELECTRIC DAMS IN THE UNITED STATES: THE FERC RELICENSING PROCESS AS A WINDOW OF OPPORTUNITY FOR SOCIAL‐ECOLOGICAL TRANSFORMATIONBrian C. CHAFFIN (College of Forestry &#38; Conservation, University of Montana, Missoula, MT, USA) and Hannah GOSNELL (College of Earth, Ocean and Atmospheric Sciences, Oregon State University, Corvallis, OR, USA)FRENCH SPECIFICITIES OF THE CONCEPT OF RIVER CONTINUITY: HISTORY, POLITICS AND PRACTICESJamie LINTON, Jacques‐Aristide PERRIN (Université Limoges, Chaire capital environnemental et gestion durable des cours d’eau, GEOLAB UMR 6042)CONFLICTIVE VIEWS ON A "SUSTAINABLE" HYDROPOWER CASCADE ON THE TER RIVERDídac JORDA‐CAPDEVILA and Beatriz RODRIGUEZ‐LABAJOS (Institut de Ciència i Tecnologia Ambientals, Universitat Autònoma de Barcelona)DOES THE RIVER EVALUATION BY ECOSYSTEM SERVICES EVALUATION IS SUSTAINABLE?Laurent LESPEZ (Université de Paris Est‐Créteil, LGP UMR 8591 CNRS), Marie‐Anne GERMAINE (Université de Paris Ouest Nanterre La Défense, Mosaïques UMR LAVUE 7218 CNRS), Régis BARRAUD (Université de Poitiers, Laboratoire Ruralités)COMPETING IDEAS OF ‘NATURAL' IN DAM REMOVAL CONTROVERSIESDolly JØRGENSEN (Luleå University of Technology, Sweden)THE SOCIAL AND POLITICAL CONTEXT OF DAM REMOVALS: THE ROLE OF NATURE, KNOWLEDGE AND PLACEColeen FOX (Department of Geography and Environmental Studies Program, Dartmouth College, Hanover, NH USA), Chris SNEDDON (Department of Geography and Environmental Studies Program, Dartmouth College, Hanover, NH USA), Frank MAGILLIGAN (Department of Geography, Dartmouth College, Hanover, NH USA)DAM REMOVAL IN NORTHWESTERN FRANCE. SOCIAL AND POLITICAL ISSUES: THE EXAMPLE OF LEGUER RIVER (BRITANY)Marie‐Anne GERMAINE (Université de Paris Ouest Nanterre La Défense, Mosaïques UMR LAVUE 7218 CNRS) and Régis BARRAUD (Université de Poitiers, Laboratoire Ruralités)During the Saturday afternoon, a fieldtrip was organized along the Clain River (Poitiers).[caption id="attachment_1769" align="aligncenter" width="474"] Fieldtrip, Poitiers (Clain River)[/caption][caption id="attachment_1771" align="aligncenter" width="474"] Fieldtrip, Poitiers (Clain River)[/caption]