HEC-RAS is a software designed to perform hydraulic 1D and 2D calculations on river channels either natural or man constructed. It allows steady flow, unsteady flow, sediment transport and water quality modelling. It is developed by the US army corps of engineers, US Department of defence and it is openly available software. The HEC-RAS steady flow is based on one dimensional energy equation, while for the unsteady flow, HEC-RAS uses an implicit, finite difference method to solve the fully dynamic Saint-Venant equations.
The objective of HEC-RAS is to solve river dynamics and river engineering problems. Applications are delimitation of flood areas, embankment and protection work design, river restoration, emergency plans for dam break, optimization of hydraulic work and risk assessment and management.
Objectives:
The students get familiar with Hec-Ras Interface,
The students understand the Software’s tools and functioning,
To simulate different inflow case scenarios and
To simulate river dynamics and understand the interaction with hydraulic structures.
Trainer
Marycarmen Martinez MSc.
Miss. Martinez is an Environmental Engineer from the Popular Autonomous University of the State of Puebla (UPAEP) – Mexico with post-graduate studies in Science in Geosciences from James Cook University – Australia. Ms. Martinez has great analytical capacity to identify impacts based on GIS focused on the environment. She has extensive experience in risk and environmental impact, developing maps and models. She has participated in sustainable projects for rural communities and projects for the conservation and sustainable use of water and soil.
This session cover the installation, presenting the Software capabilities, importing the River Geometry to Hec-Ras, entering Flow Data details and use of Boundary Conditions.
In this session we learn about how to enter geometry information of the cross sections of the river and create a river confluence, hydraulic calculations and representing a river model where there exists a river confluence and steady water depth profiles for the different flow scenarios entered.
In this session we realize a hydraulic model adding a hydraulic structure (culvert) to the river system. Also, we enter geometry information of the cross sections of the river and perform a steady flow analysis.
In this session we develop 2 models. First we develop a flooding model in 2D (two-dimension) using the most recent capability of Hec-Ras that cover analysis of Satellite data information, use of the Ras Mapper application for the visualization of the 2D simulation results and analysis of the flow conditions. The second model cover the modeling a channel from a DEM and exporting results to any GIS software.
In this session we realize a sediment analysis that cover the geometry preparation, entering quasi unsteady flow data (sediment), setting initial condition and transport parameters and running and analyzing sediment transport. Also, we create a a flood hazard map using the Raster Calculator function on HecRas.
