Updating Flood Maps with GeoHECRAS
The floodway had recently been updated and mapped under a FEMA
(Federal Emergency Management Agency) mandate. However, the study had been performed using a steady flow analysis. Peak elevations under that analysis were much higher. The City of Jordan requested that all flood maps be updated using an unsteady flow analysis.
Thole reported that the process of updating flood maps was almost effortless as a result of GeoHECRAS’s stream-lined user interface. Older maps often show minimal stream geometry, but with GeoHECRAS additional cross-sections could easily be inserted and the flood map immediately updated. Also, using the Army Corps HEC-RAS would have required a laborious process of building multiple models and running comparisons of surface water elevations through Excel or similar program. Thole said, “GeoHECRAS lets you update maps on the fly. It’s so much easier.”
Thole was also grateful for the technical support he received through CivilGEO.
“I wish every piece of software we owned had the technical support that CivilGEO provides.”