Pierre Y. Julien is Professor of Civil and Environmental Engineering at Colorado State University. He has co-authored more than 400 scientific publications including two textbooks, 20 lecture manuals and book chapters, 145 refereed journal articles, 130 professional presentations, 150 conference papers and 100 technical reports. As a professional engineer, he has completed projects and assignments for at least 50 different agencies and consulting firms world-wide. He is a member of 12 professional societies and served as Editor of the ASCE Journal of Hydraulic Engineering. He has delivered numerous keynote addresses at international conferences. In 2004, he received the H. A. Einstein Award for his outstanding contributions to sedimentation and river mechanics. He is also the author of the textbook River Mechanics (Cambridge, 2002).