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

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Current Nationally Accepted Coastal 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).



Coastal Models

Coastal Models
PROGRAMDEVELOPED BYAVAILABLE FROMCOMMENTS
Coastal Storm Surges
FEMA Surge (1988)Tetra Tech, Inc.; Engineering Methods & Applications; Greenhorne & O'Mara; Camp, Dresser & McKee, Inc.See the footnote below to find appropriate contact information based on your FEMA Region. (BAKERAECOM, RAMPP, or STARR) 3Incorporates modified NWS-23 model for hurricanes and Joint Probability Method. Reportedly more accurate for water elevations than water currents.

Public Domain: Yes
Advanced Circulation Model (ADCIRC) 2DDI
(2003)
Johannes Westerink, University of Notre Dame and Rick Luettich, University of North Carolina at Chapel Hill, Institute of Marine Sciences for USACE Coastal and Hydraulics LaboratoryNick Krauss
Coastal and Hydraulics Laboratory
3909 Halls Ferry Road
Vicksburg, MS
39180-6199
Also can be purchased from software vendors as a component of SWM.
Finite element 2-D hydrodynamic model; the version 2DDI is vertically-integrated and solves a vertically-integrated continuity equation for water surface elevation; no storm or hurricane windfield models or statistical analysis tools are included with model, they must be acquired separately; ADCIRC performs well using Vince Cardone's planetary boundary layer model windfields; statistical analyses using ADCIRC model storm surge simulations are compatible with the USACE Empirical Simulation Technique (EST) as well as joint probability methods.

Public Domain: Yes for flood insurance study purposes.
TABS RMA2 v. 4.3 and up
(Oct. 1996)
U.S. Army Corps of EngineersCoastal Engineering Research Center
Department of the Army
Waterways Experiment Station
Corps of Engineers
3909 Halls Ferry Road
Vicksburg, MS 39180-6199
Two-dimensional steady/unsteady flow model, for water levels and velocities. Computes finite element solution of the Reynolds form of the Navier-Stokes equations for turbulent flows.

Public Domain: Yes
MIKE 21
(HD/NHD)
2009 SP4
DHI Water and EnvironmentDHI Inc.
319 SW Washington St.
Suite 614
Portland, OR 97204
Solves the non-linear depth-averaged equations of continuity and conservation of momentum. Computes water levels and flows based on a variety of forcing functions. Computes wave-driven currents and wave setup. Uses a finite difference grid with dynamic nesting grid capabilities. Resolving small scale features such as narrow inland channels, culverts and control structures can be accomplished using the DHI MIKE FLOOD interface, which allows for dynamic coupling between MIKE 21 and the DHI MIKE 11 model.

Public Domain: No
DYNLETU.S. Army Corps of EngineersCoastal and Hydraulics Laboratory
Engineering Research
and Development Center
3909 Halls Ferry Road
Vicksburg, MS 39180-6199
One-dimensional model of dynamic behavior of tidal flow at inlets. Can be used to predict tide dominated velocities and water level fluctuations at an inlet and interior back bay system. DYNLET solves the full one-dimensional shallow water equations using an implicit finite difference solution.

Public Domain: Yes
Coastal Wave Heights
BOUSS-2DAquaveo, LLC
Aquaveo, LLC

http://www.aquaveo.com/software/sms-bouss2d

For simulating the propagation and transformation of waves in coastal regions and harbors, over small regions (generally 1-5 km), based on a time-domain solution of Boussinesq-type equations, including: shoaling; refraction; diffraction; full/partial reflection and transmission; bottom friction; nonlinear wave-wave interactions; wave breaking and runup; wave-induced currents; and wave-current interaction.
Public Domain: No
STWAVEU.S Army Corps of Engineers (USACE)
Aquaveo, LLC

http://www.aquaveo.com/software/sms-stwave

STWAVE is a steady-state, finite difference, spectral model based on the wave action balance equation. STWAVE simulates depth-induced wave refraction and shoaling, current-induced refraction and shoaling, depth- and steepness-induced wave breaking, diffraction, wave growth because of wind input, and wave-wave interaction and white capping that redistribute and dissipate energy in a growing wave field.  STWAVE is written by the U.S. Army Corps of Engineers Waterways Experiment Station (USACE-WES). 
Public Domain: No
WHAFIS 3.0 (1988) and 4.0 (2007)Dames & Moore, revised by Greenhorne & O'Mara, revised by Watershed ConceptsSee the footnote below to find appropriate contact information based on your FEMA Region. (BAKERAECOM, RAMPP, or STARR) 3WHAFIS 4.0 has identical wave treatments as WHAFIS 3.0. Additional features include default wind speeds for 0.2-percent-annual-chance winds and the ability for user to override default wind speeds. WHAFIS 3.0 defines wave heights associated with 100-year flood in coastal areas using modern wave action treatment; incorporates 1977 NAS recommendations on basic approximations for wind speeds, wave breaking criterion, and controlling wave height.

Public Domain: Yes
WHAFIS 3.0 GL (1993)Dames & Moore, Greenhorne & O'Mara, DewberrySee the footnote below to find appropriate contact information based on your FEMA Region. (BAKERAECOM, RAMPP, or STARR) 3Identical wave treatments as WHAFIS 3.0, but with programmed reduction of wind speeds for U.S. shorelines of the Great Lakes.

Public Domain: Yes
RCPWAVE
(1986)
U.S. Army Corps of EngineersCoastal Engineering Research Center
Department of the Army
Waterways Experiment Station
Corps of Engineers
3909 Halls Ferry Road
Vicksburg, MS 39180-6199
Treats linear, monochromatic waves propagating over grid giving coastal bathymetry, providing nearshore wave heights pertinent to proper spacing between transects or to magnitudes of wave setup.

Public Domain: Yes
CHAMP 2.0 (April 2007)Dewberry & Davis LLCSee the footnote below to find appropriate contact information based on your FEMA Region. (BAKERAECOM, RAMPP, or STARR) 3Coastal Hazard Analysis Modeling Program (CHAMP) is a Windows-based program used for erosion and wave height analyses (WHAFIS 4.0 and RUNUP 2.0) and provides summary tables and graphics for mapping. Version 2.0 provides for computation of 1-percent- and 0.2-percent-annual-chance wave envelope and includes enhancements to the Erosion and Runup Modules.

Public Domain: Yes
MIKE 21 Flexible Mesh Spectral Wave Model
2009 SP4
DHI Water and EnvironmentDHI Inc.
319 SW
Washington St.
Suite 614
Portland, OR
97204
Two-dimensional, flexible mesh, finite-volume, dynamic wind-wave growth and nearshore transformation model. The model includes a fully spectral formulation and a directional decoupled parametric formulation, includes wave-current interaction, and includes nearshore effects of refraction, shoaling, breaking, bed friction, and wind-wave growth. The wave model can be dynamically coupled with the MIKE 21 Flexible Mesh Hydrodynamic (FM HD) model so that wave setup is computed directly by the HD model.

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

Public Domain: No
MIKE 21 Nearshore Spectral Wave Model (NSW)
2009 SP4
DHI Water and EnvironmentDHI Inc.
319 SW
Washington St.
Suite 614
Portland, OR
97204
Two-dimensional stationary model for propagation of waves into the nearshore zone (refraction, shoaling, breaking, bed friction, and wind-wave growth). Based on the conservation equation for the spectral wave action density similar to HISWA model. Obstructions not directly resolvable in the grid must be modeled with grid bed roughness coefficients.

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

Public Domain: No
Simulating Waves Nearshore (SWAN), Cycle III Version 40.51The SWAN team Source Forge http://swanmodel.sourceforge.net/ Fully spectral third-generation shallow water wave model based on the wave action balance equation with sources and sinks. It incorporates formulations for deep water processes of wave generation, dissipation and the quadruplet wave-wave interactions. In shallow water, these processes are supplemented with formulations for dissipation due to bottom friction, triad wave-wave interactions, and depth-induced breaking. The model is stationary and optionally non-stationary, and can be applied in Cartesian, spherical, and curvilinear co-ordinates.

Public Domain:
Freeware
Coastal Wave Effects
BOUSS-2DAquaveo, LLC
Aquaveo, LLC
For simulating the propagation and transformation of waves in coastal regions and harbors, over small regions (generally 1-5 km), based on a time-domain solution of Boussinesq-type equations, including: shoaling; refraction; diffraction; full/partial reflection and transmission; bottom friction; nonlinear wave-wave interactions; wave breaking and runup; wave-induced currents; and wave-current interaction.
Public Domain: No
STWAVEU.S Army Corps of Engineers (USACE)
Aquaveo, LLC
STWAVE is a steady-state, finite difference, spectral model based on the wave action balance equation. STWAVE simulates depth-induced wave refraction and shoaling, current-induced refraction and shoaling, depth- and steepness-induced wave breaking, diffraction, wave growth because of wind input, and wave-wave interaction and white capping that redistribute and dissipate energy in a growing wave field. STWAVE is written by the U.S. Army Corps of Engineers Waterways Experiment Station (USACE-WES).
Public Domain: No
RUNUP 2.0 (1990)Stone & Webster Engineering Corp.,
revised by Dewberry
See the footnote below to find appropriate contact information based on your FEMA Region. (BAKERAECOM, RAMPP, or STARR) 3Executes 1978 guidance by USACE defining wave runup on shore barrier with specified approach and storm conditions; mean wave description determines mean runup elevation.

Public Domain: Yes
ACES 1.07 (1992)U.S. Army Corps of EngineersCoastal Engineering Research Center
Department of the Army
Waterways Experiment Station
Corps of Engineers
3909 Halls Ferry Road
Vicksburg, MS 39180-6199
Used for restricted fetch wave growth analysis and runup on vertical structures or revetments.

Public Domain: Yes
CHAMP 2.0 (April 2007)Dewberry & Davis LLCSee the footnote below to find appropriate contact information based on your FEMA Region. (BAKERAECOM, RAMPP, or STARR) 3CHAMP is a Windows-based program used for erosion and wave height analyses (WHAFIS 4.0 and RUNUP 2.0) and provides summary tables and graphics for mapping. Version 2.0 provides for computation of 1-percent- and 0.2-percent-annual-chance wave envelope and includes enhancements to the Erosion and Runup Modules.

Public Domain: Yes

1 Public domain models are available from source with nominal fee for reproducing, shipping and handling.

2 This model is acceptable for coastal storm surge applications only.

3 The appropriate contact for this software depends on your region:

If you live in Region 1 (CT, MA, ME, NH, RI, VT)
STARR Regional Service Center 1
One Cambridge Place
50 Hampshire Street
Cambridge, MA 02139
RSC 1 Lead: Laura Keating
(617) 452-6336

If you live in Region 2 (NJ, NY, PR, VI)
RAMPP Regional Service Center 2
15 East 26th St, 7th Floor
New York, NY 10010-1505
RSC 2 Lead: Andrew Martin
Cell (202) 379-6456
Office (212) 685-0900

If you live in Region 3 (DC, DE, MD, PA, VA, WV)
RAMPP Regional Service Center 3
8 Penn Center, 21st Floor
1628 John F. Kennedy Boulevard
Philadelphia, PA 19103
RSC 3 Lead: Marc Radell
(215) 681-9032

If you live in Region 4 (AL, FL, GA, KY, MS, NC, SC, TN)
BakerAECOM Regional Service Center 4
2835 Brandywine Road, Ste 200
Atlanta, GA 30341
RSC 4 Lead: Stephen King
(678) 459-1004

If you live in Region 5 (IL, IN, MI, MN, OH, WI)
STARR Regional Service Center 5
125 S. Wacker Drive, Suite 600
Chicago, IL 60606,
RSC 5 Lead: Mike Anderson
Mike.Anderson@starr-team.com
(312) 780-7710

If you live in Region 6 (AR, LA, NM, OK, TX)
RAMPP Regional Service Center 6
c/o Dewberry
723 South Interstate 35E, Suite 230
Denton, TX 76205
RSC 6 Lead: Rigel Rucker
(904) 735-3334

If you live in Region 7 (IA, KS, MO, NE)
STARR Regional Service Center 7
6800 College Blvd, Suite 380
Overland Park, KS 66211
RSC 7 Lead: William Zung
Office: (913) 498-0500
Cell: (816) 518-5409
Fax: (913) 498-0511

If you live in Region 8 (CO, MT, ND, SD, UT, WY)
BakerAECOM Regional Service Center 8
355 Union Boulevard, Suite 200
Lakewood, CO 80228-6509
RSC 8 Lead: David Jula
(720) 514-1101

If you live in Region 9 (AZ, CA, GUAM, HI, NV, CNMI, RMI, FSM, SAMOA)
BakerAECOM Regional Service Center 9
505 14th Street, Suite 810
Oakland, CA 94612
RSC 9 Lead: Michael Skowronek
(510) 879-0958

If you live in Region 10 (AK, ID, OR, WA)
STARR Regional Service Center 10
901 5th Avenue, Suite 3100
Seattle, WA 98164
RSC 10 Lead: Dave Carlton
(206) 682-1159

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Locally Accepted Models

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Last Updated: 
07/24/2014 - 16:00
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