Hydraulics/Hydrology Seminar Series
Functioning and Significance of Floodplain Channels in Indiana
Dr. Jonathan A. Czuba
Post-Doctoral Research Fellow
Department of Geological Sciences
Indiana University, Bloomington
Tuesday, February 28, 2017
Roughly 40% of floodplains in Indiana are dissected by networks of secondary channels that convey flow even during modest flood events. Floodplain channels begin conveying water at stages well below bankfull, become an interconnected web of flow pathways above bankfull stage, and are completely inundated at higher stages. These floodplain-channel networks have only recently been revealed by state-wide lidar data acquired in 2011. This seminar will discuss preliminary and ongoing work to understand the functioning and significance of floodplain-channel networks in Indiana, with a particular emphasis on the East Fork White River between Columbus and Seymour. This work utilizes a 2-D hydrodynamic model to understand how, when, and which channels are activated with increasing stage/flow to quantify the connectivity of these channels and how they distribute water and sediment during floods. Furthermore, model results are analyzed to quantify channel/floodplain exchange and floodplain residence times toward developing a process-based characterization of floodplain functioning.
Dr. Czuba is currently a Post-Doctoral Research Fellow in the Department of Geological Sciences at Indiana University, Bloomington. He was the recipient of a 2015-16 Interdisciplinary Doctoral Fellowship at the Institute on the Environment from the Graduate School of the University of Minnesota, and of both the 2015-16 Edward Silberman Fellowship and 2015 Alvin G. Anderson Award from St. Anthony Falls Laboratory. Jon has a Ph.D. in Civil Engineering from the University of Minnesota, M.S. and B.S. in Civil Engineering from the University of Illinois at Urbana-Champaign, and over 5 years of experience working for the U.S. Geological Survey in Illinois and Washington State.