Numerical Models Meeting the Minimum Requirement of NFIP

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Current Locally Accepted Hydraulic 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).

Hydraulic Models: Determination of Water-surface Elevations for Riverine Analysis

Hydraulic Models: Determination of Water-surface Elevations for Riverine Analysis
PROGRAMDEVELOPED BYAVAILABLE FROMCOMMENTS
One-Dimensional Unsteady Flow Models
NETWORK
(Jun. 2002)
Southwest Florida Water Management DistrictEngineering Section
Resource Management Department
2329 Broad Street
Brooksville, Florida
34604-6899
Interconnected ponds and channels routing model.

Only accepted for usage within Southwest Florida Water Management District. 

Public Domain: Yes
CHAN for Windows v.2.03
(1997)
Aquarian Software, Inc.Aquarian Software 
1415 Briercliff Drive
Orlando, Florida
34604-6899
Calibration or verification to the actual flood events is highly recommended.

Floodway concept formulation is unavailable. Encroachment stations can be specified in editor to cut off section.

Only accepted for usage within Southwest Florida Water Management District. 

Public Domain: No
MIKE URBAN
Collection Systems
(MOUSE)
Release 2009,
dated June 2010
DHI Water and EnvironmentDHI, Inc., 
319 SW Washington St.,
Suite 614,
Portland, OR 97204
MIKE URBAN has the capability to analyze storm sewer networks. Flow conditions associated with weirs, orifices, manholes, detention basins, pumps, and flow regulators can be reflected. Weirs located within the closed conduit have to be modeled as orifices. MOUSE does not independently have the capability to model overland flows; overland flow can be analyzed by coupling MIKE 11 and/ or MIKE 21. Floodway modeling capability is not available. The compliance of the hydrology module of MOUSE is not determined. Calibration to actual flood events is required.

Only Accepted for usage within areas administered by FEMA Region III (DC, DE, MD, PA, VA and WV)

Public Domain: No
Two-Dimensional Unsteady Flow Models
S2DMM
(Feb. 2008)
Tomasello Consulting Engineers, Inc.Tomasello Consulting Engineers, Inc.
5906 Center Street
Jupiter, FL 33458
Applicable to a network of rectangular grids. Capable of routings on natural overland sheetflow areas and water management systems with cascading lakes and channels. Computing runoff from either daily or hourly rainfall with design distributions, using SCS formula with soil storage and soil moisture updated on daily basis. Stage/storage, sheetflow cross sections, and soil types are represented in each computational grid entered via GIS. HEC-2 type cross sections can be entered on specific channel grids and minor channels can be embedded on general grids. Evapotranspiration computations are based on seasonal factors and soil moisture of unsaturated and saturated zones. Interactions with the subsurface conditions are handled by MODFLOW routines. Capable of simulating continuous hydrologic conditions. Cannot compute regulatory floodway.

Please review Appendix C of the Guidelines and Specifications for Flood Hazard Mapping Partners, Guidelines for Riverine Flooding Analyses and Mapping” thoroughly before applying to floodway analysis. Coordination with the Regional office is required.

The model must be calibrated to observed flow and stage records or high-water marks of actual flood events at both channel and floodplain.

Only accepted for usage in the South Florida Water Management District.

Public Domain: No
TUFLOW
Release Version
2010-10
(October 2010)
BMT WBMBMT WBM
www.bmtwbm.com 
Suite 120
8200 S. Akron Street
Centennial
Denver, CO 80112
United States

Software info:
www.tuflow.com 

Aquaveo
www.aquaveo.com 
3210 N. Canyon Road
Suite 300
Provo, Utah 84604
United States
TUFLOW is flood simulation software that simulates the hydrodynamics of water flow using the complete 2D and 1D free-surface flow equations. It includes a wide range of options for modeling structures and urban pipe networks, and for dynamic linking of 2D and 1D solutions.

The program is applicable to riverine flooding, dambreak inundation, urban overland and pipe network flows, and coastal inundation from surges and tsunamis.

The model must be calibrated to observed flow and stage records or high-water marks of actual flood events at both channel and floodplain.

Currently floodway concept formulation is not available.

Please review Appendix C of the Guidelines and Specifications for Flood Hazard Mapping Partners, “Guidelines for Riverine Flooding Analyses and Mapping” thoroughly before applying to floodway analysis. Coordination with the Regional office is required.

Only accepted for usage in FEMA Region III. 

Public Domain: No
Two-Dimensional Steady/Unsteady Flow Models
DHM 21 and 34
(Aug. 1987)
Theodore V. Hromadka II and
Chung-Cheng Yen
Hromadka & Associate 
Costa Mesa, California
Diffusion flow model that can route unconfined surface and open channel flows. Can be used to model alluvial flooding. Rainfall-runoff output can be used for hydrologic studies. Kinematic routing optional. Floodway concept formulation unavailable. Calibration to actual flood events is recommended.

Please review Appendix C of the Guidelines and Specifications for Flood Hazard Mapping Partners, “Guidelines for Riverine Flooding Analyses and Mapping” thoroughly before applying to floodway analysis. Coordination with the Regional office is required.

Please review Appendix G of the Guidelines and Specifications for Flood Hazard Mapping Partners, “Guidance for Alluvial Fan Flooding Analyses and Mapping” thoroughly before applying to alluvial fans. Coordination with the Regional office is required.

The model must be calibrated to observed flow and stage records or high-water marks of actual flood events at both channel and floodplain.

Only accepted for usage within the San Bernardino County Flood Control District, California.

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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