Context
FEMA's Federal Flood Risk Management Standard requires spatial products that help represent expanded flood risk beyond traditional floodplain boundaries. The project supported implementation of this standard through geospatial processing and floodplain raster generation.
Challenge
The work required translating floodplain and elevation information into consistent raster products. FIRM data, NFHL integration, Base Flood Elevation information, and freeboard assumptions had to be processed carefully to support usable outputs for different annual chance floodplains.
My Role
I led geospatial processing support for FFRMS mapping tasks. My work focused on integrating FIRM data into NFHL-based workflows and applying the Freeboard Value Approach for raster surface generation.
Approach
I generated raster surfaces for the 1 percent and 0.2 percent annual chance floodplains, including layers representing 1-foot, 2-foot, and 3-foot elevations above Base Flood Elevation. The work focused on 1D riverine systems in Kentucky and Iowa.
Output
The project produced FFRMS-related raster surfaces and geospatial outputs that supported floodplain mapping and review.
Impact
The work helped translate federal flood risk guidance into practical spatial products. It supported more consistent mapping and analysis for implementation of FFRMS requirements.