The Federal Emergency Management Agency (FEMA) has developed several programs to support the National Flood Insurance Program (NFIP). The programs that are available for download from this site are included in the tables below. Additional information, including tutorials, user's manuals and guidance documentation, additional guidance and sample data sets are available for certain programs. Links are provided to all available information.
Visit this page often to keep up with the available software resources provided by FEMA.
NOTE: The National Flood Frequency (NFF) has been replaced with the National Streamflow Statistics (NSS) program. NSS contains all of the NFF functionality and equations as well as low flow and other probability equations. The NFF program and database have not been changed since 2004 and will no longer be updated or supported.
Floodplain Mapping Software
Available Software Resources Provided by FEMA
Program | Description | Online Tutorials |
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The U.S. Army Corps of Engineers (USACE) Hydrologic Engineering Center's River Analysis System (HEC-RAS) computer program supersedes its HEC-2 computer program, which was widely used in the preparation of studies and restudies for the National Flood Insurance Program (NFIP). The Federal Emergency Management Agency (FEMA) has adopted the guidance that hydraulic analyses for newly contracted studies and restudies of entire watersheds (with detailed HEC-2 hydraulic analyses) should be conducted using the HEC-RAS program instead of the HEC-2 program. This floodplain modeling manual is prepared as a guide to introduce the HEC-RAS Version 3.0 modeling procedures to engineers who have experience in preparing floodplain models with the HEC-2 computer program. User's Manuals and Additional Guidance |
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cHECk-RAS is a program designed to verify the validity of an assortment of parameters found in the U.S. Army Corps of Engineers (USACE) HEC-RAS hydraulic modeling program. In cHECk-RAS Version 2.0.1, updates have been made to modernize the program code base, redesign the program interface to be more intuitive and user-friendly, improve and update existing messages generated by the program, develop new messages generated by the program and enhance ‘Help’ and reporting functions.Download cHECk-RAS version 2.0.1 User's Manuals and Additional Guidance Previous Versions
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RASPLOT Version 3.0 is the current software version. New Features of RASPLOT 3.0 Include:
User's Manuals and Additional Guidance Previous Versions
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Quick-2, Version 2.0, is the latest version of a hydraulic analysis program used to compute water-surface elevations in open channels of all types. Quick-2, Version 2.0 is designed to only run on Operating Systems (OSs) through Windows 98. FEMA does not plan to upgrade for OsS XP and beyond. FEMA suggests using HEC-RAS software for users experiencing issues using version 2.0 on later OSs. User's Manuals and Additional Guidance Previous Versions
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NFF, Version 3 can be used to:
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Coastal Hazard Analysis Modeling Program (CHAMP) is a Windows-interfaced Visual Basic language program that allows the user to enter data, perform coastal engineering analyses, view and tabulate results and chart summary information for each representative transect along a coastline within a user-friendly graphical interface. With CHAMP, the user can import digital elevation data; perform storm-induced erosion treatments, wave height analyses and wave runup analyses; plot summary graphics of the results and create summary tables and reports in a single environment. User's Manuals and Additional Guidance | ||
RUNUP, Version 2.0, is a DOS-based program for wave runup computation. This program uses stillwater elevation, shore profile and roughness and incident wave condition input information to compute a wave runup elevation that is consistent with the most detailed guidance currently available. User's Manuals and Additional Guidance | No Online Tutorial Available | |
Wave Height Analysis for Flood Insurance Studies (WHAFIS), Version 4.0, is a DOS-based program that uses representative transects to compute wave crest elevations in a given study area. Transects are selected considering major topographic, vegetative and cultural features. WHAFIS uses this and other input information to compute an appropriate depth-limited wave height at the seaward end of each transect. User's Manuals and Additional Guidance | No Online Tutorial Available | |
* U.S. Geological Survey software package. | ||