2D Floodplain Delineation using 2D HEC-RAS Model

Urban Watersheds Research Institute
September 29th, 2016 to September 30th, 2016
Leonard Rice Engineering Training Facility
Denver, CO
 HEC-RAS 5.0 has been significantly improved and includes new abilities. One of them is to perform two‐dimensional (2D) hydrodynamic flow routing. Now, users can perform one‐dimensional
 (1D) and 2D unsteady‐flow modeling, as well as combined 1D and 2D routing. Students will learn the basic theory and knowledge of 2D unsteady flow modeling and common applications. The class exercises will be practically carried out by creating a 2D HEC-RAS model and delineating flood inundation extents. Every class exercise will be performed based on working through each key element step-by-step. The subjects that will be covered in this course are:
 1) Basic theory and knowledge of unsteady flow hydraulics.
 2) Understanding of basic 2D flood hydraulic modeling and application. 
 3) Introduction of HEC-RAS 5.0.
 4) Create and run your first 2D HEC-RAS step by step.   
 5) Considerations and limitations of developing a 2D HEC-RAS model.  
 6) Combined HEC-RAS 1D and 2D routing.
 7) Inline and lateral Structures with 2D flood routing.
 8) How to stabilize and optimize the computation results. 
 9) Exporting modeling results.
 10) Flood inundation extents delineation using RAS Mapper.
 11) Modeling errors and troubleshooting.
Workshops will include creating a terrain model and computational mesh using RAS Mapper, setting up the initial boundary conditions, adding structures, stabilizing an unsteady flow model, and exporting computation results and mapping. This workshop is suitable for engineers, technicians and current HEC-RAS users responsible for flood inundation delineation and unsteady flow modeling.
Dr. Max Shih, PhD, P.E., CFM is a task leader and project manager for surface water hydrology and hydraulics (H&H) and sediment transport projects in the AECOM Denver office. He has more than 14 years of experience in H&H analyses, specifically providing flood inundation mapping for frequency floods and dam breach floods and spatially variable watershed hydrologic and sediment erosion modeling. Dr. Shih has conducted many 2D/3D flow hydraulic and sediment transport modeling projects using HEC-RAS 5.0(incl. Beta version), TABS-2, SMS, FLO-2D, GSTARS, and FLOW-3D programs. He will share his years of experience and lead the class through practical 2D flood hydraulic modeling exercises.
Ryan Byrne, P.E., CFM is a Senior Project Engineer at Martin/Martin Inc. providing water resources support for land development projects across the Denver Metro area. He has more than 8 years of experience performing computational hydrologic and hydraulic analysis for flood control and floodplain mapping. He has extensive experience with spatial watershed analysis for both small and large scale studies both within and outside of the Urban Drainage and Flood Control District and Denver Metropolitan area. He will provide course support related to the HEC-RAS and 2D flow modeling exercises from a perspective of a long-term practitioner.
Computers.  Bring your own!  Have the HEC-RAS v5.0 installed before you come to class.
For more information, call 303-728-4449 and ask for Ben, or e-mail him at info@uwtrshd.com


Tamarisk Coalition's

mission is to advance the restoration of riparian lands through collaboration, education, and technical assistance.