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Coastal processes simulated by the CMS.
Coastal Modeling System flow chart.
Among CMS’ success stories is the study on the evaluation of a proposed channel for circulation improvement in Kawaihae Harbor, HI.
The Coastal Modeling System (CMS) is a suite of coupled two-dimensional (2D) numerical models for simulating waves, hydrodynamics, salinity and sediment transport, and morphology change. Developed by the Coastal Inlets Research Program (CIRP) of the ERDC Coastal & Hydraulics Laboratory (CHL), the CMS provides coastal engineers and scientists an efficient tool for understanding coastal processes and for designing and managing of coastal inlets, navigation channels, ports, harbors, coastal structures and adjacent beaches. The CMS was identified by the USACE Community of Practice (CoP) as a preferred model for Coastal Engineering and Coastal Navigation investigations.
The CMS provides coastal engineers and scientists a PC-based, easy-to-use, accurate, and efficient tool to assist in designing and managing coastal engineering and navigation projects by facilitating:
The CMS consists of a flow model (CMS-Flow) and a wave model (CMS-Wave). CMS-Flow is a 2D depth-integrated model for simulating wave-averaged hydrodynamics and nonuniform sediment transport and morphology change in coastal waters. CMS-Flow calculates currents and water levels and includes physical processes such as wetting and drying, advection, wave-enhanced turbulent mixing and bottom friction, forcing from wind, atmospheric pressure, waves, river, tides, and the Coriolis-Stokes force. CMS-Wave is a 2D, finite-difference spectral wave model and simulates wave generation, transformation, and dissipation. Physical processes calculated in the model include refraction, diffraction, reflection, bottom friction, breaking, waves-current interaction, and structure effects. CMS-Flow and CMS-Wave are tightly coupled and may be run on the same or different computational grids. The models also support grid nesting within larger domain simulations. CMS is interfaced through the Surface-water Modeling System (SMS). The CMS is designed for small to medium project scale (order of 1 to 10s of km) applications. Some key CMS features include:
The CMS has been verified with 10 analytical cases and validated with 16 field and 14 laboratory datasets covering a wide range of conditions. Examples of CMS applications include:
CMS has been applied at more than 70 project sites in the US in seven international project sites. Examples documented in CMS reports include Matagorda Bay, Texas; Grays Harbor, Wash.; Mouth of the Columbia River, Wash./Ore.; Ocean Beach, Calif.; Southeast Oahu Coast, Hawaii; Field Research Facility, Duck, N.C; Hazaki Oceanographic Research Facility, Japan; Mississippi Sound and Barrier Islands; Gironde Estuary, France; St. Augustine Inlet, Fla.; and Shark River Inlet, N.J.
The CMS is available for free from the CMS Release Page, can be run as a stand-alone executable, and is interfaced and distributed through the Surface-Water Modeling System (SMS).
CMS help is available through workshops, webinars, on-site traning and several wiki pages. For more information, please visit CIRP online.
ERDC Points of Contact
Questions about CMS?
Julie D. Rosati
Program Manager of CIRP
Phone: (251) 694-3719 or (202) 761-1850
CMS Principal Investigator
Phone: (601) 634-2840