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HEC-FDA
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HEC-FDA Version 1.4 (Under development)

The HEC-FDA Version 1.4 update will fix the order statistics algorithm used to compute exceedance probability functions, with the interface remaining mostly unchanged. HEC-FDA 1.4 is scheduled to be released by the second quarter of FY 2011.

HEC-FDA Version 2.0 (Under development)

The HEC-FDA Version 2.0 package will be a significant advance over the earlier versions of HEC-FDA. HEC-FDA 2.0 will have a new graphical user interface, that allows the user to more readily view and organize their study data. The new interface will contain geographic information system (GIS) components that will greatly enhance the applicability of HEC-FDA for flood risk management studies. Version 2.0 will also contain features for evaluating and comparing non-structural measures within a flood damage reduction study. Finally, damage in HEC-FDA 2.0 can be computed using the existing method (aggregated stage-damage functions) or on a structure-by-structure basis using depth grids.

The ability to use spatially referenced data to develop input for a new study or to upgrade the data in an existing database will be a key feature of HEC-FDA 2.0. GIS capabilities in the version will allow users to create structure inventories from parcel maps, census block data, or land use shapefiles. This capability will provide a cost effective way to update existing structure inventories or create approximate structure inventories for future conditions.

Another goal of HEC-FDA 2.0 is to allow an analyst, not proficient in GIS, to be able to readily manipulate, analyze, and display spatially referenced data layers on his or her workstation, which would improve their efficiency when completing a flood damage analysis study. Spatially referenced data layers commonly used will include stream system alignments, aerial photographs, flood inundations depth grids, county parcels and census blocks information, land use patterns, impact area polygons, and jurisdictional and political boundaries (communities, counties, states, watersheds and basins, Congressional districts, etc.).

HEC-FDA 2.0 will also have features that allow for clear-cut analysis of non-structural flood damage reduction measures. These measures will include removing, relocating structures and flood-proofing structures, as well as installation of a flood warning system.