Hydraulics/Hydrology Seminar Series
Feedbacks between channel geometry and sediment distribution
Dr. Kyungrock Paik
Edward M. Curtis Visiting Professor
Lyles School of Civil Engineering, Purdue University
School of Civil, Environmental, and Architectural Engineering
Wednesday, February 3, 2016
Natural streams exhibit interesting scaling relationships in the variation of their width, depth, velocity among others at a given cross-section or along downstream direction. We have investigated how these scaling relationships vary between rivers. While most natural rivers show greater rate of width increase than that of depth along downstream, inverse cases have been reported as well. Understanding a dominant control behind the formation of such cases has remained an interesting question. During our pursuit on this question, a noticeable correlation was found between channel geometry scaling and spatial variability in suspended sediment concentration. This has lead us to study a further interesting question: whether varying channel geometry drives spatial variability in sediment rating or vice versa. We have tried to solve this puzzling question by analyzing observed data and numerical modeling.
Dr. Paik received Bachelor’s and Master’s degree (Civil Engineering) in 1995 and 2001, respectively, from Korea University. He received Ph.D. degree in 2006 from the University of Illinois at Urbana-Champaign. Just after his Ph.D., i.e., starting in 2006, he was appointed as a Lecturer at the School of Environmental Systems Engineering, at the University of Western Australia. He moved to Korea University in 2009 and is currently an Associate Professor at the School of Civil, Environmental, and Architectural Engineering. He is visiting Purdue as the Curtis Visiting Professor, and will stay at Lyles School of Civil Engineering until May 2016.