Add to ORKGInternational audienceThe Rhône river is one of the main European alpine rivers (watershed: 98 500 km²; length: 812 km; mean annual discharge at its mouth: 1700 m3 s-1). The fluvial landscape has been engineered for more than 150 years (e.g., dykes, hydroelectric canals) leading to altered aquatic and riparian ecosystems. Today, stakeholders face tension in balancing various user interests regarding nature conservation, flood control, economic and recreational activities.In order to inform river managers and citizens, and to help environmental policies implementation, a collaborative and integrative science platform was established. The objective of the Human-Environment Observatory “Rhône Valley” (OHM VR, 2011) is to provide and share know...