With the release of HEC-RAS 5.0 (and newer versions), the Hydrologic Engineering Center (HEC) added the ability to perform two-dimensional (2D) hydrodynamic routing to the HEC-RAS computer model. This webinar will provide an overview of the new HEC-RAS 2D tools and solution processes and the basic capabilities of the HEC-RAS 2D model. The 2D flow modeling can be accomplished by adding 2D flow area element. This is similar to adding a storage area in a 1D unsteady flow model. The flow area is developed by adding a 2D polygon, developing the computational mesh, and linking the 2D flow area either to a 1D model element or directly connecting boundary conditions to the 2D flow area. Each of these steps will be discussed. Guidelines on when to use 2D flow modeling and an example problem of developing a simple computational mesh and running the model will also be covered.
Arthur C. Miller, Ph.D., DWRE
Distinguished Professor Emeritus
Dr. Miller is a nationally recognized expert in hydrology, hydraulic engineering, dam safety, and water resource management. His over 40 years of experience includes research, consulting, and publishing in hydrology, hydraulics, floodplain delineation, dam safety, bridge scour, river mechanics, sediment transport, and impacts of climate change. He is renowned for his expertise in numerical modeling of open channel flow; unsteady flow; hydraulic design techniques for dams, bridges and culverts; river mechanics; and sediment transport. Dr. Miller teaches courses throughout the country on topics ranging from fundamental hydraulics to open channel flow to hydrologic processes. He regularly teaches courses for the National Highway Institute, Association of State Dam Safety Officials, Federal Energy Regulatory Commission, and Federal Emergency Management Agency.
Amanda J. Hess, P.E., CFM
H&H Group Manager, Gannett Fleming, Inc.
Mrs. Amanda J. Hess is a Vice President of Gannett Fleming and the Manager of the Hydrology and Hydraulics Group in their Dams and Hydraulics Section in Camp Hill, Pennsylvania. Amanda received her bachelor’s and master’s degrees in civil engineering from the Pennsylvania State University. She is responsible for leading analyses for water resources projects and designing hydraulic structures. Amanda regularly conducts seminars on hydrologic and hydraulic modeling including instruction on HEC-HMS, HEC-RAS, HEC-RAS 2D and SITES. She serves on Value Engineering, Independent Peer Review and Potential Failure Modes Analysis Teams, provides litigation support in the areas of flooding and water supply system operation, and was a coauthor of the updated FEMA guidelines for Selecting and Accommodating Inflow Design Floods for Dams.