Chris Walsh has been working and writing on the interactions between streams and their landscapes for 20 years. With Professor Tim Fletcher he leads the Waterway Ecosystem Research Group, and is a senior member of the Melbourne Waterway Research- Practice Partnership with Melbourne Water. Both groups aim to optimize urban (and other) land and water management for the protection and restoration of running waters. Current projects include a world-first experiment in restoring the ecological health of a stream through catchment-scale retrofit of urban stormwater drainage. This project and his research more broadly have led to many high-impact publications that have recast the problem of urban stormwater runoff, influencing reforms to urban water management internationally.