There is the need to understand the underlying physical, biological, and chemical mechanisms that govern stream processes and their response to natural and human disturbances. This knowledge is critical to develop science-based approaches for managing and restoring the degraded rivers. The Greenchannel is a unique research facility that brings together river scientists, engineers, and managers to explore river flows and riparian zones. The Greenchannel is uniquely equipped to: Conduct hydraulic, hydrological and instream and riparian ecological life-sized experiments under controlled conditions Impose and repeat all kinds of hydrographs, including overbank floods Quantify physical, chemical, and biological processes taking place both in the river and in the associated riparian areas from microscopic to reach scales Provide verification for advanced computational models Host highly visible formal and informal education