Numerical Models Meeting the Minimum Requirement of NFIP

Current Nationally Accepted Statistical Models

Statistical Models

**Statistical Models**
PROGRAM	DEVELOPED BY	AVAILABLE FROM	COMMENTS
HEC FFA 3.1 (February 1995)	U.S. Army Corps of Engineers	Water Resources Support Center ¹ Corps of Engineers Hydrologic Engineering Center 609 Second Street Davis, CA 95616-4687	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. Public Domain: Yes
PEAKFQ 2.4 (April 1998) and up	U.S. Geological Survey	U.S. Geological Survey Hydrologic Analysis Software Support Team 437 National Center Reston, VA 20192	Performs flood frequency analyses following Bulletin 17B, Guidelines for Determining Flood Flow Frequency, prepared by the Interagency Advisory Committee on Water Data (1982). Public Domain: Yes
FAN	FEMA	The Mod Team 3601 Eisenhower Avenue Alexandria, VA 22304	FAN, 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. NFIP software list Public Domain: Yes

¹ Program is typically distributed by vendors and may not be available through HEC. A list of vendors may be obtained through HEC.