US Army Corps of Engineers

Coastal Inlets Research Program

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The Coastal Inlets Research Program (CIRP)

Because of the multiple interacting forces and the numerous scales of geomorphic change ranging in time from days of a storm to centuries for long-term adjustment, the physical processes of inlets are poorly understood. Little quantitative information is available to predict infilling of navigation channels, long-term change in the nearshore – affecting channel and jetty stability, short- and long-term migration trends and cycles of inlets, and the interactions among inlets, adjacent beaches, and estuary.
The Coastal Inlets Research Program, or CIRP, advances the state of knowledge and develops engineering technology for predicting the waves, current, sediment transport, and morphology change at and around inlets. Products of the CIRP improve management and design of coastal inlets through increased reliability of actions and reduction in operation and maintenance costs. The CIRP takes a variety of approaches, including developing concepts and theory for all relevant time scales, numerical simulation, field data collection, and laboratory experimentation. Reports and peer-reviewed articles as found on this web site provide the information gained from the CIRP to the Corps, scientific community, and public.

Recent Updates
WIS Portal Import Tool for CMS-Wave
WaveNet functionality for obtaining model data in model format has been integrated into the WIS Data Portal.

Introductory video on the Coastal Inlets Research Program from ERDC Corporate Communications.
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The appearance of U.S. Department of Defense (DoD) visual information does not imply or constitute DoD endorsement.


CSAT Analyses of High-density Bathymetry: Shoaling along a section of the lower Mississippi River using USACE eHydro datasets collected for the entire calendar year 2019.
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Distribution Liability

The data represents the results of data collection/processing for a specific US Army Corps of Engineers activity and indicates the general existing conditions. As such, it is only valid for its intended use, content, time and accuracy specifications. The user is responsible for the results of any of the application of the data for other than its intended purpose.


More Information
CIRP Map Portal
Check out our national web maps for channel shoaling, tidal inlet details, and more here!