Modeling obstructions is quite easy using GeoHECRAS 2D
I wanted to share with you how helpful GeoHECRAS-2D was on our latest project.
The project involved determining the impacts of a lot redevelopment on the existing drainage. While the Army Corps HEC-RAS 2D could be used to generate a two-dimensional model for the existing conditions, the model’s limited capabilities made evaluating modeling a future condition (e.g. a solid perimeter wall) very cumbersome. In fact, HEC-RAS 2D is not capable of modeling obstructions in a 2-dimensional domain directly. In order to model the perimeter wall within HEC RAS 2D, the only practical option would be to manually modify the terrain.
However, modeling obstructions is quite easy using GeoHECRAS 2D. By creating a shapefile of the perimeter wall footprint, we assigned the feature as a 2D flow obstruction and the future condition was incorporated. From there it was a matter of running this scenario to determine and evaluate the impacts. Once the impacts were determined, breaks along the perimeter wall were incorporated into the 2D flow obstruction to demonstrate how the site plan could be modified to remove the adverse impact that would result from a solid perimeter wall.
Thanks for this time saving feature.
Chris Rod, P.E.
Project Manager/Project Engineer
JE Fuller, Inc.