Introduction to Hydrodynamic and Floodplain Modelling Using HEC-RAS

By the end of this course, you will be able to:

• Understand how hydrodynamic and floodplain models are structured and developed within HEC‑RAS
• Run HEC‑RAS simulations and recognize common warnings, errors, and modelling issues
• Interpret depth, velocity, and flood extent outputs to support sound engineering judgement
• Assess uncertainty and calibration considerations when reviewing or using flood models
• Confidently engage with HEC‑RAS results in professional practice, even when you are not the primary modeller

Description

Flood modelling outputs are often used to inform critical engineering decisions related to safety, land use, infrastructure design, and risk management. Even if you are not responsible for building models yourself, you are expected to understand where results come from, what they represent, and how much confidence you can place in them.

This course provides a practical introduction to hydrodynamic and floodplain modelling using HEC‑RAS, with a focus on how models are built, how simulations are run, and how results should be interpreted in real‑world engineering contexts. You will work through the fundamentals of model structure, inputs, and outputs, developing an understanding of what “good practice” looks like and where common limitations arise.

Rather than training you to be a modelling specialist, this course builds the knowledge needed to responsibly review, use, and communicate HEC‑RAS results. Emphasis is placed on engineering judgement, understanding uncertainty, and applying model outputs appropriately within professional and regulatory environments.

Who Should Attend

This course is designed for:

• Civil and environmental engineers involved in flood studies, drainage, or water resources work
• Engineers and practitioners who review or use HEC‑RAS model outputs as part of their role
• Early‑career and graduate engineers seeking a structured introduction to flood modelling concepts
• Professionals new to hydrodynamic modelling who want to engage more confidently with models and results

A general familiarity with basic hydraulic concepts is assumed. No prior experience with HEC‑RAS is required.

Day 1

Fundamentals and Getting Started with HEC‑RAS

• Overview of hydrodynamic and floodplain modelling concepts
• Overview of HEC‑RAS and model organization
• Building a simple model, including geometry, inputs, and boundary conditions
• Running basic simulations and understanding common warnings or errors
• Interpreting model results in a practical engineering context

Day 2

Floodplain Mapping and Practical Use

• Linking model results to floodplain mapping
• Working with terrain data and visualization tools
• Reviewing depth, extent, and velocity outputs
• Parameter uncertainty and model calibration
• Examples from practice and discussion of typical applications