This page is a resource for coastal flood hazard information pertinent to FEMA and the National Flood Insurance Program (NFIP), specifically technical modeling and mapping applications. This page is intended for individuals, professionals, and communities interested in information on how to update flood risk studies and maps in coastal areas.
Coastal Flood Hazard Guidance Documents and Forms
The Coastal Flood Risk Study Process page provides a brief introduction to some of the main modeling and mapping theoretical components associated with a FEMA coastal flood hazard analysis. These components should be considered when developing coastal map revision requests in order for the requester to submit a complete request including the provision of MT-2 Forms. More detailed information is provided in FEMA’s guidance documents.
Guidance for conducting coastal flood hazard analysis and mapping was originally housed in three separate documents organized by geography:
- Atlantic Ocean and Gulf of Mexico Coastal Guidelines Update (2007)
- Final Draft Guidelines for Coastal Flood Hazard Analysis and Mapping for the Pacific Coast of the United States (2005)
- Great Lakes Coastal Guidelines Update (2014)
As a part of FEMA’s larger guidance transformation effort, the three geographically organized coastal guidance volumes are being parsed out by topic and guidance for the three coastal geographies are being combined. The guidance is now organized by topic or physical process with references, where appropriate, to mythologies that are recommended for specific geographical areas. Engineering judgement should be used when applying guidance documents.
The table below summarizes the topics that have been transformed. Transformed guidance content supersedes content in the original three volumes; however, the three volumes have not been transformed in their entirety yet and are therefore still relevant for the non-transformed sections.
All documents listed below can be found on the FEMA Guidance for Flood Risk Analysis and Mapping page.
Topics that Have Been Transformed
Guidance Document Title
General Coastal Considerations
Guidance: Coastal General Study Considerations (February 2018)
Guidance: Coastal Study Documentation and Intermediate Data Submittals (May 2014)
Coastal Barrier Resources System
Guidance: Coastal Barrier Resources Systems (CBRS) Mapping on FEMA FIRMs (May 2014)
Coastal Flood Risk Datasets
Guidance: Coastal-Specific Non-Regulatory Datasets (May 2014)
Guidance: Coastal Data Capture (May 2014)
Combined Coastal and Riverine Floodplain (NEW)
Guidance: Combined Coastal and Riverine Floodplain (May 2015)
|Erosion||Guidance: Erosion (February 2018)|
|Overland Wave Propagation||Guidance: Overland Wave Propagation (Nov 2015)|
Guidance: Coastal Structures (Nov 2015)
Guidance: Coastal Wave Setup (Nov 2015)
Guidance: Coastal Floodplain Mapping (February 2018)
Flood Frequency and Extreme Value Analysis
Guidance: Coastal Fl ood Frequency and Extreme Value Analysis (Nov 2016)
Guidance: Coastal Water Levels (May 2016)
Notation, Acronyms, Glossary
Guidance: Coasta l Notation, Acronyms, and Glossary of Terms (May 2016)
|Coastal Statistical Simulation Methods||Guidance: Coastal Simulation Methods (Nov 2016)|
Coastal Guidance by Geographic Location
East and Gulf Coasts
Atlantic Ocean and Gulf of Mexico Coastal Guidelines Update (Feb 2007)
Guidelines for Coastal Flood Hazard Analysis and Mapping for the Pacific Coast of the United States (Jan 2005)
Guidance: Great Lakes Coastal Guidelines Update (Jan 2014)
Other Coastal Guidance Documents
FEMA Coastal Models and Software
FEMA has developed several programs to support coastal flood hazard analysis including the Coastal Hazard Analysis Modeling Program (CHAMP), RUNUP, and Wave Height Analysis for Flood Insurance Studies (WHAFIS).
For More Information
For more information or additional assistance: