This project concerns the cross-border basin of the Elnon, a watercourse partly located on the border between France and Belgium and surrounded by urban areas. Municipalities are subject to a significant risk of flooding: the ELNON project proposes integrated flood risk management through the implementation of several cross-border actions: the implementation of structuring hydraulic installations along the Elnon River; information and awareness-raising among the local population about the risk of flooding; creation of an active network between partners to coordinate actions and exchange information on techniques and methods to be implemented in order to improve the protection of the population against flooding. Solutions for resolving failures must be coordinated at cross-border level to increase efficiency and find a joint, global and optimal solution.