The river system of Dove and Gose Elbe (Hamburg, Germany) has to cope with floods and, more recently, with droughts. The distribution of the storage volume during flood events is now managed by the monitoring and control system, improved and finalised by RECONECT. Thanks to the project, hybrid solutions will also be implemented combining existing grey infrastructure and Nature-based Solutions — Authors: Dr.-Ing. Natasa Manojlovic, Senior Researcher at Hamburg University of Technology, member of the scientific advisory team for the German Demonstrator; Christian Ebel, The Ministry for Environment, Agriculture and Energy (BUKEA) of the City of Hamburg; Dieter Ackermann, Agency for Roads, Bridges and Waterways (LSBG) of the City of Hamburg.