A. OSMAN AKAN, PhD, PE, is Professor and current Chair of the Department of Civil and Environmental Engineering at Old Dominion University in Norfolk, Virginia. He has more than thirty years of teaching, research, and consulting experience in the general field of water resources engineering. His publication record includes Urban Stormwater Hydrology (Wiley), several chapters in design handbooks, and numerous articles in scholarly journals. ROBERT J. HOUGHTALEN, PhD, is Professor and Head of the Civil Engineering Department at the Rose-Hulman Institute of Technology in Terre Haute, Indiana. During his thirty years of experience in water resources, his publishing credits include Fundamentals of Hydraulic Engineering Systems, Third Edition (with Ned H. C. Hwang) and the Federal Highway Administration's Hydraulic Design of Highway Culverts, Second Edition (HDS 5) (with Jerome M. Normann and William J. Johnston). For more than fifteen years, he has taught the EPA-SWMM model and the Corps of Engineers' HEC-HMS model in continuing education classes for ASCE.