A compliant RAS2FIM HEC-RAS model

Goals:

• To visually outline what a “compliant” model

Outcomes and Takeaways:

• A better understanding of what sort of HEC-RAS model RAS2FIM was developed against
• The ability to predict (at a gross level) wheather a given HEC-RAS model is or is not expected to run
• These HEC-RAS models are largely representative of the BLE standard, at least as implemented across FEMA region 6

RAS2FIM timeline

RAS2FIM workflow

HEC-RAS data format

Example model 1

The sample Iowa Flood Center HEC-RAS model

Models: * 1D, 1 reach - nothing fancy * (2D/Storage) * Active plan points to flows

Stations: Can be a-spatial or have mismatched projections/datums Do not have to start at 0 Do not have to add up to the geometric/geographic length of the cross section

Example model 2

Model sources

A screenshot of the FEMA region 6 BLE dashboard

Thinking about how you would scale this out? There are a few different technical hurdles to look out for, see the need for a more FAIR HEC-RAS format here.