Numerical Models Meeting the Minimum Requirement of National Flood Insurance Program

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Current Locally Accepted Hydrologic Models

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).

Hydrologic Models: Determination of Flood Hydrographs

Hydrologic Models: Determination of Flood Hydrographs
PROGRAMDEVELOPED BYAVAILABLE FROMCOMMENTS
Single Event
VCRat 2.6 (Dec. 2008)Ventura County Watershed Protection DistrictVentura County Watershed Protection District 

800 S. Victoria Ave., Ventura, CA 93009
The VCRat model is based on the Modified Rational Method (MRM) and calculates a hydrograph of runoff at all subarea collection points within the watershed, combines hydrographs from each subarea, and routes the combined hydrograph through the channel system.

Manual and the training materials are available from the District.

Only accepted for usage within the Ventura County, California area.

Public Domain: Yes.
AHYMO 97
(Aug. 1997)
Albuquerque Metropolitan Arroyo Flood
Control Authority, Anderson-Hydro
Anderson-Hydro

13537 Terragon Drive, NE
Albuquerque, NM 87112
Flood hydrographs at different locations along streams.

Only accepted for usage and the default parameters in the model applicable within New Mexico.

Information on the AHYMO model 

Public Domain: Yes
Colorado Urban
Hydrograph Procedure
(CUHPF/PC)
(May 1996 and May 2002)
Denver Urban Drainage
and Flood Control District
Denver Urban Drainage and Flood Control District

2480 West 26th Avenue, Suite 156-B
Denver, CO 80211
Flood hydrographs at different locations along streams. Hydrographs are routed using UDSWM2-PC (a modified version of the Runoff Block of EPA's SWMM).

Only accepted for usage and the default parameters in the model applicable within the Denver, Colorado, metro area. 

Public Domain: Yes
FLO-2D v. 2009. 06Jimmy S. O'BrienFLO-2D Software, Inc.
P.O. Box 66
Nutrioso, AZ 85932

www.flo-2d.com/
Runoff excess is computed by distributed hydrological parameters. Surface runoff routing is based on the non-linear dynamic wave approximation of the momentum equation. Applicable to watersheds with flows characterized as dispersed surface runoff instead of concentrated channel flow.

Only accepted for usage within Mohave County, Cochise County, and Pima County, Arizona

Public Domain: No

View More Locally Accepted Models

Nationally Accepted Models

Numerical Models No Longer Accepted

Last Updated: 
07/24/2014 - 16:00
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