Theodore V. Hromadka II, Ph.D., Ph.D., Ph.D., PE
Johannes J. DeVries, Ph.D., PE
Howard H. Chang, Ph.D., PE
Dr. Paolo Zannetti, Ph.D., QEP
Theodore V. Hromadka II obtained his doctoral degrees in Mathematics and Civil Engineering. Ted is the author of more than 350 technical papers, 20 books and numerous key reports or procedure manuals, including the Hydrology Manuals for the counties of Orange, San Bernardino, Kern, Imperial and San Joaquin, California. Ted is considered an expert in hydrologic and hydraulic modeling, water quality, Best Management Practices, sediment transport, groundwater modeling and water supply. He has participated in the preparation of 55 city or county-wide Master Plans of Drainage.For more information about Theodore V. Hromadka you can log on to his personal web site at

Johannes J. DeVries is considered one of the world’s foremost experts regarding topics involving the Hydrologic Engineering Center’s HEC-1, HEC-2 and HEC-6 computer models. Joe developed application procedures for new features of the HEC-1 program and participated in HEC’s training program as lecturer and course coordinator. Joe is the author of the U.S. Army HEC training Document # 15, which presents both the procedures for using HEC-1 and calibration features. Joe is the author of more than 60 technical papers, three books, and several invited chapters in compendium editions.
Howard H. Chang is a Professor on the civil engineering faculty at San Diego State University and is also involved in professional consulting. Dr. Chang is considered an authority on flood plain mapping issues, channel design, river channel erosion and sedimentation, hydrological simulation and watershed analysis. He is the author of over 100 technical papers, several computer models for river morphology and fluvial river hydraulics, and the book Fluvial Processes in River Engineering (Wiley and Sons).
Dr. Paolo Zannetti earned his Doctorate in Physics from the University of Padua, Italy. He is the author of over 150 publications, including the textbook Air Pollution Modeling . He is on the Board of Editors of Environmental Software, Atmospheric Environment, Ecological Modeling, as well as Founder and Director of the biennial ENVIROSOFT. Dr. Zannetti is a renowned expert in the fields of air pollution and environmental modelling and software. Additionally, Dr. Zannetti is the President and Founder of the EnviroComp Institute. Interested parties can receive a free issue of EnviroNews from FiatLux Publications by accessing Dr. Zannetti here.