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Statistical Numerical Models Meeting the Minimum Requirement of the National Flood Insurance Program

National Models

Other Models

No Longer Accepted Models

This page provides a list of nationally and locally accepted statistical models that meet National Flood Insurance Program (NFIP) requirements for flood hazard mapping activities. This page is intended for engineers, surveyors, floodplain managers and FEMA mapping partners.

Disclaimers

  • This website lists models, where the compliance with the requirements of 44 CFR 65.6(a)(6) has been previously demonstrated for use in FEMA flood hazard studies and/or mapping efforts. The lists include models that Professional Engineers can use to perform engineering analysis and mapping for flood insurance studies, however a model’s inclusion on this list does not indicate whether its approval or certification is current as to any other governmental agency. Professional Engineers are ultimately responsible for the appropriate application and accuracy of the results.
  • FEMA is not responsible for technical support or accuracy of the results and has not evaluated the technical soundness of the models independently.
  • This list cannot be used as a marketing tool explicitly or implicitly anywhere.
  • FEMA updates its list as necessary, however, the accuracy of this list is not guaranteed. It is highly recommended that model selection is discussed with FEMA before undertaking or initiating any analysis intended to be submitted to FEMA.
  • FEMA provides this list for reference only, and in doing so, does not endorse any non-federal products, companies or services. If you believe that any information provided on this page is inaccurate, please contact FEMA at 1-877-FEMA MAP (1-877-336-2627).

Current Nationally Accepted Statistical Models

Statistical Models

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Program: FAN

Developed By

FEMA

Available From

FEMA
and
Michael Baker Jr.
3601 Eisenhower Avenue
Alexandria, VA 22304

Public Domain

Yes

Comments

FAN, FEMA's Alluvial Fan Flooding software, is used to define special flood hazard information in areas subject to alluvial fan flooding. The model does not define the extent of the special flood hazard area (SFHA), rather, develops output information that can, in conjunction with soil, topographic, and geomorphic information, be used to divide the SFHA into zones of similar depth and velocity.

The minimum input required is the flood-frequency relation at the apex. Options allow for consideration of multiple flow paths with or without avulsions during flood events.

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Program: HEC FFA 3.1 (February 1995)

Developed By

U.S. Army Corps of Engineers (USACE)

Available From

Water Resources
Support Center
U.S. Army Corps of Engineers
Hydrologic Engineering Center
609 Second Street
Davis, CA 95616-4687

Public Domain

Yes

Comments

Performs flood frequency analyses following Bulletin 17B, Guidelines for Determining Flood Flow Frequency, prepared by the Interagency Advisory Committee on Water Data (1982). Supersedes HECWRC.

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Program: HEC-SSP 1.1 (April 2009) and up

Developed By

U.S. Army Corps of Engineers

Available From

Water Resources
Support Center
U.S. Army Corps of Engineers
Hydrologic Engineering Center
609 Second Street
Davis, CA 95616-4687

Public Domain

Yes

Comments

Performs flood frequency analyses following Bulletin 17B, Guidelines for Determining Flood Flow Frequency, prepared by the Interagency Advisory Committee on Water Data (1982). Supersedes HECWRC.

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Program: PEAKFQ 2.4 (April 1998) and up

Developed By

U.S. Geological Survey

Available From

U.S. Geological Survey
Hydrologic Analysis Software Support Team
437 National Center
Reston, VA 20192

Public Domain

Yes

Comments

Performs flood frequency analyses following Bulletin 17B, Guidelines for Determining Flood Flow Frequency, prepared by the Interagency Advisory Committee on Water Data (1982).

PKFQWin is the Windows version of the PEAKFQ program.

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More Nationally and Locally Accepted Models

Numerical Models No Longer Accepted

Please visit the Numerical Models No Longer Accepted by FEMA for NFIP Usage page for a list of unaccepted models.

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