Colin Thorne, Ph.D., has been an academic for more than four decades, including appointments at Colorado State University, U.S. Army Corps of Engineers Waterways Experiment Station, and Agricultural Research Service National Sedimentation Laboratory. His research concentrates on fluvial hydraulics and sediment transport in natural, modified and managed rivers, particularly with respect to the implications for erosion, sedimentation and flood risk. Thorne performs original research and consultancy nationally and internationally, including work on large rivers and their coastal deltas. Currently, he is leading a research consortium on Blue-Green Cities and is engaged a collaborative research with Portland State University and Reed College on green infrastructure in Portland, Oregon.