Authors and Contributing Authors

Haestad Methods

The Haestad Methods Engineering Staff is an extremely diverse group of professionals from six continents with experience ranging from software development and engineering consulting, to public works and academia. This broad cross section of expertise contributes to the development of the most comprehensive software and educational materials in the civil engineering industry. In addition to the specific authors credited in this section, many at Haestad Methods contributed to the success of this book.

Gary R. Dyhouse, M.S., P.E.

Gary R. Dyhouse, principal author of Floodplain Modeling Using HEC-RAS, is an engineering consultant, specializing in hydrology and hydraulics. During his recent consulting career, he has served as an expert witness for the State of California, worked as a levee expert for a large project proposed in the southeastern United States, performed and reviewed water surface profile analyses for private engineering firms, and conducted several workshops on the use of the HEC-RAS program.

Prior to consulting, Mr. Dyhouse's career spanned 32 years with the U.S. Army Corps of Engineers, primarily with the St. Louis District and one year with the Hydrologic Engineering Center, Davis, California. For most of his career with the Corps, he was Chief of Hydrologic Engineering for the St. Louis District, overseeing all District work in computer modeling dealing with flood hydrology, open channel hydraulics, and frequency analysis. He has performed or overseen the completion of dozens of flood insurance studies, as well as many channel modification, levee, and reservoir analyses and designs.

During the Great Flood of 1993 in the Midwestern United States, he was the chief technical spokesman for the St. Louis District Corps of Engineers, dealing with national and international press, radio, and TV media. Following the flood, Mr. Dyhouse was a much sought after expert, speaking on the flood and the impacts of levees and reservoirs on flood damage reduction around the United States. He appeared in several films on the Great Flood of 1993, including videos prepared by the PBS Nova series and the British Broadcasting Company. Prior to his retirement from the Corps of Engineers, Mr. Dyhouse served as project manager for the St. Louis District's portion of the UMRSFFS (Upper Mississippi River System Flood Frequency Study). This multi-year, multi-Corps District, multimillion dollar project has a goal of updating the stage-frequency relationships for about 2,000 mi (3,200 km) of the Missouri and Mississippi Rivers using period of record unsteady flow modeling, incorporating the impacts of the 1993 flood.

Mr. Dyhouse is on the Civil Engineering faculty of Washington University at St. Louis and the University of Missouri-Rolla Graduate Engineering Center, where he has taught graduate and undergraduate courses since the mid-1980s. He has lectured at numerous training courses and workshops sponsored by the Corps' Hydrologic Engineering Center and the Waterways Experiment Station. Mr. Dyhouse has also taught hundreds of engineers for Haestad Methods' training courses on HEC-RAS and PondPack. He has authored more than 30 professional publications and technical documents while with the Corps, including portions of Corps manuals dealing with river hydraulics and sedimentation in rivers and reservoirs. He is a member of ASCE and has served as Associate Editor for the Hydraulic Engineering Journal. Mr. Dyhouse is a registered professional engineer in Missouri.

Jennifer Hatchett, P.E.

Jennifer Hatchett, engineering training specialist at Haestad Methods, holds a B.S. and M.S. in Civil Engineering from Clemson University. Prior to joining Haestad Methods, Mrs. Hatchett worked as a Water Resources engineer at an ENR Ranked Top 50 Design Firm. She performed and managed several floodplain and floodwater studies for FEMA and was the project engineer responsible for performing steady-state backwater calculations for existing and proposed conditions for bridge replacements and widenings using HEC-RAS.

Mrs. Hatchett also served as Technical Evaluation Contractor for the Federal Emergency Management Agency (FEMA) in Fairfax, VA. She has created and reviewed hydrologic and hydraulic computer models for use in Flood Insurance Studies (FIS), evaluated scientific and technical accuracy of requests to revise existing FISs and Flood Insurance Rate Maps (FIRMs) and ensured compliance with federal regulations. She served as a project manager in the processing of FISs while coordinating with representatives of the National Flood Insurance Program to ensure that the FISs were produced accurately, within budget, and on schedule. Jennifer served as a technical liaison between FEMA and other governmental agencies, communities, and private engineering firms, including drafting official FEMA correspondence.

Jeremy Benn, CEng, FICE, FCIWEM

Jeremy Benn is a graduate of the University of Cambridge, England, and holds a Masters degree in Engineering Hydrology from the University of Newcastle, England. He has over 20 years experience in river engineering in the UK and overseas gained from both research and commercial consultancy. He is familiar with a wide range of river modeling software, including HEC-RAS, ISIS, HEC-HMS, MIKE-11, and 2-d and 3-d models.

Mr. Benn has lectured widely on the use of computer models in catchment management, flood control, and the estimation of scour. He has been a representative on several technical committees including the Flood Risk Mapping Framework in England and Wales and the railways panel on bridge scour. Mr. Benn is a Fellow of the Institution of Civil Engineers and a Fellow of the Chartered Institution of Water and Environmental Management.

David Ford Consulting Engineers

David Ford Consulting Engineers in Sacramento, California, specializes in hydrologic engineering, floodplain management, flood-damage-reduction planning, reservoir-system analysis, decision-support system development, and technology transfer. The firm is recognized for its innovative work in flood warning systems, including real-time forecasting and inundation mapping, flood response planning, and flood warning decision support system development. Clients worldwide range from city and local government agencies to international agencies.

Houjung Rhee, P.E.

Houjung Rhee holds a B.S. in Civil Engineering from the University of Alaska, Anchorage, and a M.S. in Civil Engineering from the University of South Carolina. Houjung has been a member of ASCE, APWA, and AWWA and served on the Engineering Computer Applications Committee of AWWA as well as the Environmental Engineering subcommittee of ASCE.