ASDSO Dam Safety Toolbox

Two-Dimensional Hydraulic Models

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A two-dimensional hydraulic model (USGS, 2021)

One-dimensional models include mathematical simplifications related to the assumption that flood depth remains uniform over the entire cross section. This assumption is not accurate for wide and flat floodplain areas. Two-dimensional models use full dynamic or simplified forms of one- and two-dimensional shallow water equations to solve both one-dimensional channel flow and two-dimensional overland flow and are more appropriate for flat and wide floodplain areas”. [1]

Best Practices Resources

Federal Guidelines for Inundation Mapping of Flood Risks Associated with Dam Incidents and Failures (FEMA P-946) (Federal Emergency Management Agency)

Trainings

On-Demand Webinar: HEC-RAS 2D Modeling

On-Demand Webinar: Intro to the Application of 2D Hydraulic Modeling for Dam and Levee Safety


Citations:

  1. ↑ FEMA P-946 Federal Guidelines for Inundation Mapping of Flood Risks Associated with Dam Incidents and Failures, FEMA, 2013


Revision ID: 4289
Revision Date: 11/18/2022

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