National Models
Local Models
Other Models
No Longer Accepted Models
This page provides a list of nationally and locally accepted hydraulic 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 Code of Federal Regulations Title 44 (44 CFR) Revision of Base Flood Elevations Determinations 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 Hydraulic Models
Hydraulic Models: Determination of Water-Surface Elevation for Riverine Analysis
Please reference the following memorandums on the use of HEC-RAS for NFIP purposes. Note that the memorandums are periodically updated and should be read each time before referring to the below chart.
One-Dimensional Steady Flow Models
Program: cHECk-RAS
Developed By
Federal Emergency Management Agency (FEMA)
Available From
Federal Insurance and Mitigation Administration
500 C Street, SW
Washington, DC 20472
Public Domain
Yes
Comments
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. cHECk-RAS utilizes information generated by HEC-RAS (all versions through the latest version, 4.1.0.) This program can run only on computers with Microsoft Windows XP, Vista, or 7 (32- or 64-bit) operating systems. The current version of cHECk-RAS in use is 2.0.1.
Program: HEC-RAS 3.1.1 and up
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
For water surface elevation difference due to use of different HEC-RAS versions, refer to FEMA Memorandum HEC-RAS Version Updates (August 17, 2004)
Program: HEC-RAS 6.0.0 AND UP (MAY 2021)
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
The River Analysis System is able to model spatially and time varying precipitation and infiltration to 2D flow Areas, Storage areas, and between 1D cross sections. Three infiltration methods are available; Initial and Constant Loss method and the SCS method, and Green and Ampt method.
Calibration runs against available gage or other study data should be used wherever possible to validate model output.
Program: HEC-RAS 5.0.0 and up (Mar 2016)
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
The River Analysis System is able to model excess precipitation applied directly to a 2D flow area. Losses and infiltration are not currently able to be computed within RAS, so excess precipitation should be determined using separate approved hydrologic methods or software (such as HEC-HMS) prior to applying it within the model domain.
Calibration runs against available gage or other study data should be used wherever possible to validate model output.
Program: HY8 4.1 and up (Nov. 1992)
Developed By
U.S. Department of Transportation,
Federal Highway Administration (FHWA)
Available From
Federal Highway Administration
Public Domain
Yes
Comments
Computes water-surface elevations for flow through multiple parallel culverts and over the road embankment.
Program: PondPack v. 8 (May 2002) and up
Developed By
Bentley Systems
Available From
Bentley Systems
685 Stockton Drive
Exton, PA 19341
Public Domain
No
Comments
Cannot model ineffective flow areas. HEC-RAS or an equivalent program must be used to model tail water conditions when ineffective flow areas must be considered.
Program: QUICK-2 1.0 and up (Jan. 1995)
Developed By
FEMA
Available From
Federal Emergency Management Agency
Federal Insurance and Mitigation Administration
500 C Street, SW
Washington, DC 20472
FEMA Flood Hazard Mapping Software
Public Domain
Yes
Comments
Intended for use in areas studied by approximate methods (Zone A) only. May be used to develop water-surface elevations at one cross section or a series of cross sections. May not be used to develop a floodway.
Program: RASPLOT 3.0 Beta and up
Developed By
FEMA
Available From
Federal Emergency Management Agency
Federal Insurance and Mitigation Administration
500 C Street, SW
Washington, DC 20472
RASPLOT
Public Domain
n/a
Comments
RASPLOT is a computer program developed by the Federal Emergency Management Agency (FEMA) which allows the user to create flood profiles through the automatic extraction of data from Hydraulic Engineering Centers River Analysis System (HEC-RAS) hydraulic modeling files. Flood profiles are required for inclusion in the Flood Insurance Study (FIS) reports which usually accompany the Flood Insurance Rate Map (FIRM) for communities participating in FEMA’s National Flood Insurance Program.
Program: StormCAD v.4 (June 2002) and up
Developed By
Bentley Systems
Available From
Bentley Systems
685 Stockton Drive
Exton, PA 19341
Public Domain
No
Comments
Only applicable to watershed, which has the drainage area to each inlet of less than 300 acres.
Program: WSPGW 12.96 (Oct. 2000) and up
Developed By
Los Angeles Flood Control District and Joseph E. Bonadiman & Associates, Inc.
Available From
Joseph E. Bonadiman & Associates, Inc.
234 N. Arrowhead Avenue,
San Bernardino, CA 92408
Public Domain
No
Comments
Windows version of WSPG. Computes water-surface profiles and pressure gradients for open channels and closed conduits. Can analyze multiple parallel pipes. Road overtopping cannot be computed. Open channels are analyzed using the standard step method but roughness coefficient cannot vary across the channel. Overbank analyses cannot be done. Multiple parallel pipe analysis assumes equal distribution between pipes so pipes must be of similar material, geometry, slope, and inlet configuration. Floodway function is not available.
Program: WSPRO (Jun. 1988 and up)
Developed By
U.S. Geological Survey (USGS),
Federal Highway Administration (FHWA)
Available From
Federal Highway Administration
Public Domain
Yes
Comments
Floodway option is available in June 1998 version. 1988 version is also available.
Program: XPSWMM version 8.52 and up XPStorm 10.0 (May 2006) and up
Developed By
Innovyze
Available From
Innovyze
6720 SW Macadam Avenue, Suite 200
Portland, OR 97219
Public Domain
No
Comments
Model must be calibrated to observe flows, or discharge per unit area must be shown to be reasonable in comparison to nearby gage data, regression equations or other accepted standards for 1% annual chance events.
Calibration or verification to the actual flood events highly recommended.
XPStorm has the same stormwater modeling capability as the XPSWMM program.
One-Dimensional Unsteady Flow Models
Program: HEC-RAS 6.0.0 AND UP (MAY 2021)
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
The River Analysis System is able to model spatially and time varying precipitation and infiltration to 2D flow Areas, Storage areas, and between 1D cross sections. Three infiltration methods are available; Initial and Constant Loss method and the SCS method, and Green and Ampt method.
Calibration runs against available gage or other study data should be used wherever possible to validate model output.
Program: FEQ 9.98 and FEQUTL 5.46 (2005, both), and up
Developed By
Delbert D. Franz,
Linsley, Kraeger
Associates;
and Charles S. Melching,
USGS
Available From
U.S. Geological Survey
221 North Broadway Avenue
Urbana, IL 61801
USGS.gov/proj/feq/
Public Domain
Yes
Comments
The FEQ model is a computer program for the solution of full, dynamic equations of motion for one-dimensional unsteady flow in open channels and control structures. The hydraulic characteristics for the floodplain (including the channel, overbanks, and all control structures affecting the movement of flow) are computed by its companion program FEQUTL and used by the FEQ program.
Calibration or verification to the actual flood events highly recommended.
Floodway concept formulation is unavailable.
Program: FLDWAV (Nov. 1998)
Developed By
National Weather Service (NWS)
Available From
Hydrologic Research Laboratory
Office of Hydrology
National Weather Service, NOAA
1345 East-West Highway
Silver Spring, MD 20910
Public Domain
Yes
Comments
Includes all the features of DAMBRK and DWOPER plus additional capabilities. It is a computer program for the solution of the fully dynamic equations of motion for one-dimensional flow in open channels and control structures. Floodway concept formulation is unavailable.
Calibration to actual flood events required.
This model has the capability to model sediment transport. Program is supported by NWS.
National Weather Service FLDWAV Computer Program
Program:FLO-2D v. 2007.06 and 2009.06
Developed By
Jimmy S. O'Brien
Available From
FLO-2D Software, Inc.
P.O. Box 66
Nutrioso, AZ 85932
Public Domain
No
Comments
Hydrodynamic model for the solution of the fully dynamic equations of motion for one-dimensional flow in open channels and two-dimensional flow in the floodplain. Bridge or culvert computations must be accomplished external to FLO-2D using methodologies or models accepted for NFIP usage.
Please review 'Guidance for Flood Risk Analysis and Mapping for Alluvial Fans' thoroughly before applying to alluvial fans. Coordination with the Regional office is required. Calibration to actual flood events is required.
Program: HEC-RAS 3.1.1 and up
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
Calibration or verification to the actual flood events is highly recommended. Floodway concept formulation unavailable.
Version 3.1 cannot create detailed output for multiple profiles in the report file. CHECK-RAS cannot extract data.
Program: HEC-RAS 5.0.0 and up (Mar 2016)
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
The River Analysis System is able to model excess precipitation applied directly to a 2D flow area. Losses and infiltration are not currently able to be computed within RAS, so excess precipitation should be determined using separate approved hydrologic methods or software (such as HEC-HMS) prior to applying it within the model domain.
Calibration runs against available gage or other study data should be used wherever possible to validate model output.
Program: StormWise (formerly ICPR4)
Developed By
Streamline Technologies, Inc.
Available From
Streamline Technologies, Inc.
1135 East State Road 434
Suite 3002
Winter Springs, FL 32708
Website: Streamline.tech
Public Domain
No
Comments
The model must be calibrated to observed flow and stage records or high-water marks of actual flood events at both channel and floodplain. Floodway concept formulation unavailable; however, version 3 allows users to specify encroachment stations to cut off the cross section.
Program: MIKE 11 HD v.2009 SP4
Developed By
DHI Water & Environment
Available From
DHI, Inc.
319 SW Washington St.
Suite 614
Portland, OR 97204
Public Domain
No
Comments
A dynamic coupling of MIKE 11/ MIKE HYDRO River (one-dimensional) and MIKE 21 (two-dimensional) models. Solves the fully dynamic equations of motion for one- and two-dimensional flow in open channels, riverine flood plains, alluvial fans and in costal zones. This allows for embedding of sub-grid features as 1-D links within a 2-D modeling domain. Examples of sub-grid features could include small channels, culverts, weirs, gates, bridges and other control structures.
Please review 'Guidance for Flood Risk Analysis and Mapping for Floodway Analysis 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.
Program: MIKE 11 (2009 SP4)<br>MIKE 11 HD v.2009 SP4
Developed By
DHI Water & Environment
Available From
DHI, Inc.
319 SWM Washington St, Suite 614
Portland, OR 97204
Public Domain
No
Comments
Hydrodynamic model for the solution of the fully dynamic equations of motion for one-dimensional flow in open channels and control structures. The floodplain can be modeled separately from the main channel.
Calibration to actual flood events is required. Floodway concept formulation is available for steady flow conditions. This model has the capability to model sediment transport.
Program: MIKE 11 v.2009 SP4 and up <br>MIKE HYDRO River v.2016 and up
Developed By
DHI Water & Environment
Available From
DHI Water & Environment Inc.
141 Union Blvd., Ste 250
Lakewood, Colorado, 80228, USA
Public Domain
No
Comments
MIKE HYDRO River is DHI’s new river modeling software package. It utilizes MIKE 1D as its computational engine. The MIKE 1D engine is the result of a re-engineering merger process of the calculation capabilities of DHI’s collection system (MOUSE) and river simulation engine (MIKE 11) into one engine.
Calibration or verification to the actual flood events highly recommended.
Program: SWMM 5 Version 5.0.005 (May 2005) and up
Developed By
U.S. Environmental Protection Agency (EPA)
Available From
Storm Water Management Model
U.S. Environmental Protection Agency
Public Domain
Yes
Comments
SWMM 5 provides an integrated environment for editing study area input data, running hydrologic simulations, and viewing the results in a variety of formats.
Program: UNET 4.0 (April 2001)
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
The model must be calibrated to observed flow and stage records or high-water marks of actual flood events at both channel and floodplain. Comparison of bridge and culvert modeling to other numerical models reveals significant differences in results; these differences may be investigated in the near future. Floodway option is not accepted for NFIP usage.
Program: XPSWMM version 8.52 and up XPStorm 10.0 (May 2006) and up
Developed By
Innovyze
Available From
Innovyze
6720 SW Macadam Avenue Suite 200
Portland, OR 97219
Public Domain
No
Comments
Model must be calibrated to observe flows, or discharge per unit area must be shown to be reasonable in comparison to nearby gage data, regression equations or other accepted standards for 1% annual chance events.
Calibration or verification to the actual flood events highly recommended.
XPStorm has the same stormwater modeling capability as the XPSWMM program.
Two-Dimensional Steady/Unsteady Flow Models
Program: HEC-RAS 6.0.0 AND UP (MAY 2021)
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
The River Analysis System is able to model spatially and time varying precipitation and infiltration to 2D flow Areas, Storage areas, and between 1D cross sections. Three infiltration methods are available; Initial and Constant Loss method and the SCS method, and Green and Ampt method.
Calibration runs against available gage or other study data should be used wherever possible to validate model output.
Program: Adaptive Hydraulics (AdH) version 4.2 and up (June 2012)
Developed By
U.S. Army Corps of Engineers (USACE)
Available From
U.S. Army Engineer Research and Development Center Coastal and Hydraulics Laboratory
3909 Halls Ferry Rd., Vicksburg, MS 39180
Public Domain
Yes
Comments
AdH is a spatially implicit, physics based hydrodynamic model that can simulate a wide range of hydraulic features, including rainfall and evaporation, overland flooding, wind and wave effects, friction impacts due to vegetation, and several types of hydraulic structures. AdH also includes the ability to simulate time and space varying head and flow boundary conditions, making it suitable in many coastal, estuarine, and riverine applications. AdH has been applied in the high tidal ranges of Alaska and in the deserts of Afghanistan. AdH has been used widely throughout the U.S. for sediment and constituent transport, dam break, tidal impacts, and flooding analyses. User manual and various training resources for the AdH model is available on the AdH website. More information on AdH can be found on the USACE website.
Program: FESWMS 2DH 1.1 and up (Jun. 1995)
Developed By
U.S. Geological Survey
Available From
U.S. Geological Survey
National Center
12201 Sunrise Valley Drive
Reston, VA 22092
Public Domain
Yes
Comments
This model has the capability to model sediment transport. Please review the applicable guidance for FEMA’s Risk Mapping, Assessment, and Planning thoroughly before applying to floodway analysis. Coordination with the Regional office is required.
Please review 'Guidance for Flood Risk Analysis and Mapping for Alluvial Fans' 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.
Program: FLO-2D v. 2007.06 and 2009.06
Developed By
Jimmy S. O'Brien
Available From
FLO-2D Software, Inc.
P.O. Box 66
Nutrioso, AZ 85932
FLO-2d.com/
Public Domain
No
Comments
Hydrodynamic model that has the capabilities of modeling unconfined flows, complex channels, sediment transport, and mud and debris flows. Please review the applicable guidance for FEMA’s Risk Mapping, Assessment, and Planning thoroughly before applying to floodway analysis. Coordination with the Regional office is required.
Please review 'Guidance for Flood Risk Analysis and Mapping for Alluvial Fans' 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.
Program: HEC-RAS Version 5.0 and up (Mar 2016)
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
The River Analysis System is able to model excess precipitation applied directly to a 2D flow area. Losses and infiltration are not currently able to be computed within RAS, so excess precipitation should be determined using separate approved hydrologic methods or software (such as HEC-HMS) prior to applying it within the model domain.
Calibration runs against gage or other study data should be used wherever possible to validate model output.
Program: MIKE FLOOD HD v.2009 SP4 and up.
Developed By
DHI Water & Environment
Available From
DHI Water & Environment Inc.
141 Union Blvd., Ste 250
Lakewood, Colorado, 80228, USA
Public Domain
No
Comments
A dynamic coupling of MIKE 11/ MIKE HYDRO River (one-dimensional) and MIKE 21 (two-dimensional) models. Solves the fully dynamic equations of motion for one- and two-dimensional flow in open channels, riverine flood plains, alluvial fans and in coastal zones. This allows for embedding of sub-grid features as 1-D links within a 2-D modeling domain. Examples of sub-grid features could include small channels, culverts, weirs, gates, bridges and other control structures.
Please review 'Guidance for Flood Risk Analysis and Mapping for Alluvial Fans' 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.
Program: Sedimentation and River Hydraulics, Two-Dimensional River Flow Model (SRH-2D)
Developed By
U.S. Bureau of Reclamation
Technical Service Center
Sedimentation and River Hydraulics Group
Denver Federal Center
6th and Kipling, Building 67
Denver, Colorado 80225-0007
Available From
U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
Public Domain
Yes
Comments
SRH-2D, Sedimentation and River Hydraulics – Two-Dimensional model, is a two-dimensional (2D) hydraulic, sediment, temperature, and vegetation model for river systems. The SRH-2D model can be executed independently of any third party software, but pre-processing greatly facilitates development of the computational mesh elements. Public domain alternatives are available for this pre-processing. However, FHWA has contracted with the firm AquaVeo to integrate the SRH-2D model into their Surface-water Modeling System (SMS).
SRH-2D may be applied but not limited to: Flow in one or multiple streams covering the main channel, side channels, and floodplains; Hybrid mesh methodology which uses arbitrary mesh cell shapes; Flood routing and inundation mapping over any terrain; Flow around in-stream structures such as weirs, diversion dams, release gates, coffer dams, etc.; Flow over-spill over banks and levees; Flow over vegetated areas and interaction with main channel flows; Flow in reservoirs with known flow release; and Morphological assessment of bed erosion potential.
Program: TABS RMA2 v. 4.3 and up (Oct 1996) RMA4 v. 4.5 and up (July 2000)
Developed By
US Army Corps of Engineers (USACE)
Available From
Coastal Engineering Research Center
Department of the Army Waterways Experiment Station
Corps of Engineers
3909 Halls Ferry Road
Vicksburg, MS 39180-6199
Public Domain
Yes
Comments
Limitations on split flows. Floodway concept formulation unavailable. More review anticipated for treatment of structures.
Please review 'Guidance for Flood Risk Analysis and Mapping for Floodway Analysis and Mapping' thoroughly before applying to floodway analysis. Coordination with the Regional office is required.
Please review 'Guidance for Flood Risk Analysis and Mapping for Alluvial Fans’ 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 highwater marks of actual flood events at both channel and floodplain.
Program: XPSWMM, XPStorm 10.0 and up
Developed By
Innovyze
Available From
Innovyze
6720 SW Macadam Avenue Suite 200
Portland, OR 97219
Public Domain
No
Comments
The program simulates two-dimensional free surface flows by solving the full-dimensional, depth averaged, momentum and continuity equations. The two-dimensional simulation is dynamically linked with the one-dimensional modeling of XPSWMM/XPStorm by taking the one-dimensional water surface elevation profile as the internal boundray condition of the 2D domain. Flow rates transferred depend upon the head difference and the roughness of cells.
The program does not have any option to model weir flow along 1D/2D boundary; caution must be applied when transfer of flow along these boundaries.
The model must be calibrated to observed flow and stage records or high-water marks of actual flood events on both channel and floodplain.
Locally Accepted Hydraulic Models
Hydraulic Models: Determination of Water-surface Elevations for Riverine Analysis
One-Dimensional Unsteady Flow Models
Program: CHAN for Windows v.2.03 (1997)
Developed By
Aquarian Software Inc.
Available From
Aquarian Software
1415 Briercliff Drive
Orlando, Florida
34604-6899
Public Domain
No
Comments
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.
Program: FLO-2D Pro
Developed By
Jimmy S. O'Brien
Available From
FLO-2D Software, Inc.
P.O. Box 66
Nutrioso, Arizona 85932
FLO-2D Pro Website
Public Domain
No
Comments
An integrated river and floodplain model. A flood routing hydrologic and hydraulic model with urban detail features, sediment transport, mudflow, and groundwater modeling. Please review the applicable guidance for FEMA’s Risk Mapping, Assessment, and Planning, specifically Alluvial fan guidance document titled Guidance: Alluvial Fans (Nov 2016), thoroughly before applying to alluvial fans. Coordination with the Regional Office is required. Calibration to actual flood events is required.
Only accepted for usage within Mohave County, Pima County, Pinal County, Maricopa County, Arizona, Union County and City of La Grande, Oregon.
Program: MIKE URBAN Collection Systems (MOUSE) Release 2009, dated June 2010
Developed By
DHI Water and Environment
Available From
DHI. Inc.
319 SW Washington St.
Suite 614
Portland, Oregon 97204
DHI Website
Public Domain
No
Comments
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 3 (District of Columbia, Delaware, Maryland, Pennsylvania, Virginia and West Virginia).
Program: StormWise (formerly ICPR4)
Developed By
Streamline Technologies, Inc.
Available From
Streamline Technologies. Inc.
1135 East State Road 434
Suite 3002
Winter Springs, FL 32708
Website: Streamline.tech
Public Domain
No
Comments
Hydrology, integrated 1-D/2-D surface hydraulics and 2-D groundwater model.
Only accepted for usage within the state of Florida; County of Georgetown, South Carolina; City of Lubbock, Texas; and the Cities of Lafayette and Martinsville, Indiana.
Program: NETWORK (Jun. 2002)
Developed By
Southwest Florida Water Management District
Available From
Engineering Section
Resource Management Department
2329 Broad Street
Brooksville, Florida
34604-6899
Southwest Florida Water Management District Website
Public Domain
Yes
Comments
Interconnected ponds and channels routing model.
Only accepted for usage within Southwest Florida Water Management District.
Two-Dimensional Unsteady Flow Models
Program: S2DMM (Feb. 2008)
Developed By
Tetra Tech
Available From
Tetra Tech
759 South Federal Highway, Suite 314
Stuart, Florida 34994
Contact: Brian Proctor, Vice President, SE Operations Manager
Email: Brian.Proctor@Tetratech.com
Direct: (772) 781-3472
Public Domain
No
Comments
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 the applicable guidance for FEMA’s Risk Mapping, Assessment, and Planning 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.
Program: TUFLOW Release Version 2016-03, and up
Developed By
BMT WBM
Available From
BMT WBM
Suite 120
8200 S. Akron Street
Centennial, Colorado 80112
BMT Website
Software information available at TUFLOW's website.
Aquaveo
3210 N. Canyon Road
Suite 300
Provo, Utah 84604
Aquaveo Website
Public Domain
No
Comments
TU FLOW is flood simulation software that simulates the hydrodynamics of water flow using the complete 2D and 1 D 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 1 D 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 the applicable guidance for FEMA’s Risk Mapping, Assessment, and Planning thoroughly before applying to floodway analysis. Coordination with the Regional Office is required.
Only accepted for usage in FEMA Region 3 (District of Columbia, Delaware, Maryland, Pennsylvania, Virginia and West Virginia) and in the City of Simi Valley, California.
Two-Dimensional Steady/Unsteady Flow Models
Program: DHM 21 and 34 (Aug. 1987)
Developed By
Theodore v. Hromadka II
and Chung-Cheng Yen
Available From
Hromadka & Associate
Costa Mesa, California
Diffusion Hydrodynamic Model Website
Public Domain
No
Comments
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 the applicable guidance for FEMA’s Risk Mapping, Assessment, and Planning thoroughly before applying to floodway analysis. Coordination with the Regional Office is required.
Please review the applicable guidance for FEMA’s Risk Mapping, Assessment, and Planning, Guidance: Alluvial Fans (Nov 2016), 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.
Program: FLO-2D Pro
Developed By
Jimmy S. O'Brien
Available From
FLO-2D Software, Inc.
P.O. Box 66
Nutrioso, Arizona 85932
FLO-2D Pro Website
Public Domain
No
Comments
An integrated river and floodplain model. A flood routing hydrologic and hydraulic model with urban detail features, sediment transport, mudflow, and groundwater modeling. Please review the applicable guidance for FEMA’s Risk Mapping, Assessment, and Planning, specifically Alluvial fan guidance document titled Guidance: Alluvial Fans (Nov 2016), thoroughly before applying to alluvial fans. Coordination with the Regional Office is required. Calibration to actual flood events is required.
Only accepted for usage within Mohave County, Pima County, Pinal County, Maricopa County, Arizona, Union County and City of La Grande, Oregon.
Program: StormWise (formerly ICPR4)
Developed By
Streamline Technologies, Inc.
Available From
Streamline Technologies. Inc.
1135 East State Road 434
Suite 3002
Winter Springs, FL 32708
Website: Streamline.tech
Public Domain
No
Comments
Hydrology, integrated 1-D/2-D surface hydraulics and 2-D groundwater model.
Only accepted for usage within the state of Florida; County of Georgetown, South Carolina; City of Lubbock, Texas; and the Cities of Lafayette and Martinsville, Indiana.
Program: SWMM 5 VERSION 5.0.005 (MAY 20025) AND UP
Developed By
U.S. Environmental Protection Agency (EPA)
Available From
U.S. Environmental Protection Agency
Public Domain
Yes
Comments
SWMM 5 provides an integrated environment for editing study area input data, running hydrologic simulations, and viewing the results in a variety of formats.
More Nationally and Locally Accepted Models
- Coastal Models Meeting the Minimum Requirement of NFIP
- Hydrologic Models Meeting the Minimum Requirement of NFIP
- Statistical Models Meeting the Minimum Requirement of NFIP
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.