• Introduction
• Open channel movement of a fluid.
• Concepts of  Energy Height and Head losses.
• Manning formula for channels
• Variable, permanent, varied and Uniform flow regime
• Control sections and Boundary conditions

 Guided exercise: Understand the basic concepts

• Introduction
• HEC-RAS mathemtical and phisical principles
• Advantages and disadvantages of the program.
• Software installation.

• Introduction
• Initial interface
• Creating a new project
• Definition of geometry
• Defining the flow and boundary conditions
• Simulation
• Viewing the results
• Location of geometry and flow files in windows
• Checking calculations

Guided exercise: How to build a basic hydraulic model in HEC-RAS.

• Introduction
• Cross sections editing tools  from the options menu.
• Manning coefficients definition
• Definition of structures in cross sections
• Using quick data tables
• Cross Section Interpolation
• Section inversion.
• Importing geometries

Guided exercise: Working with geometries.

•  Introduction to ArcGIS
• Using ArcGIS to create a Digital Elevations Model.
• ArcGIS Hydrologic tools
• Summary of processes

Guided exercise: Integration with ArcGIS.

• Introduction
• Downloading and activating the GeoRAS extension in ArcGIS
• Generation of a geometry
• Exporting geometries to HEC-RAS

Guided exercise: Create and import geometries.

• Introduction
• Theoretical bases
• Bridges and culverts
• Inline structures, weir and gates.
• Lateral structures
• Multiple reaches and junctions in channels and rivers.

Guided exercise: Input parameters for a hydraulic model.

• Introduction
• Previous theoretical concepts
• Editing flows and profiles in steady flow regime
• Boundary conditions
• Plans and hypothesis
• Simulation

Guided exercise: Flow simulation.

• Introduction
• Output tables
• Profiles and cross sections diagrams
• Graphics
• Three dimensional channel views

Guided exercise: Exploring the results.

Introduction

Identifying errors

Identifying alarms and notifications

Conclusions

The usage of Geographic Information Systems (GIS) is rapidly growing, becoming an essential tool in a variety of business sectors like engineering, environment, geography, mining or geomarketing. Among GIS tools, ArcGIS is one of the most used GIS software worldwide, the most stable and versatile, comprised by a set of integrated applications, with a solid documentation over a wide range of tools being also supported by a large community.

HEC RAS is a simple and intuitive hydraulic modelling program that allow simulating the behaviour of a river/channel taking into account the morphology, slope and type of riverbed. In its calculations we can include also infrastructures like water intakes, bridge pillars and terrain. It allows us to estimate the water reach points, evaluating the flood hazards and learn about the flood risk areas etc. In addition, using this software, we can correctly determine the location of the new defense hydraulic infrastructures.

HEC-GeoRAS is an extension for ArcGIS that facilitate the connection between HECRAS and ArcGIS. Its capabilities include the extraction of ArcGIS data to obtain the riverbed morphology, type of terrain and so on. Once the simulation is done in HECRAS, we can import, visualize and handle the results directly in ArcGIS.

No, the training course starts from the very beginning. However, having prior knowledge of ArcGIS may be beneficial.

Due to changes in the ESRI licensing policy, the trial version of 60 days for ArcGIS – ArcMap it is not available anymore. You can get access to the full capabilities of ArcGIS platform with the new ArcGIS for Personal Use option available at the following link.

HEC-RAS and GEO RAS are programs developed by the US Corps of Engineers and available for download on their website: HEC-RAS and GeoRAS.