CMS

Coastal Modeling System

An Advanced Engineering Tool

The Coastal Modeling System is an integrated suite of numerical models for simulating flow, waves, sediment transport, and morphology change in coastal areas. The system is designed for practical applications in navigation channel performance and sediment management for coastal inlets and adjacent beaches in order to improve the usage of USACE Operation and Maintenance Funds. The CMS is intended as a research and engineering tool that can be used on desk-top computers. The CMS takes advantage of the Surface-water Modeling System (SMS) interface for grid generation and model setup, as well as plotting and post-processing.

• Background

The CMS has been a research and development area of the Coastal Inlets Research Program (CIRP) at the United States Army Corps of Engineers - Engineering Research and Development Center (USACE-ERDC), Coastal and Hydraulics Laboratory (CHL) since 2006. It was built from a group of numerical models that have been under development since 2002. Information on the CIRP and publications on the CMS can be found at the CIRP Website.

• Key Features

• Fully integrated system

1. CMS-Flow - Inline flow, sediment and salinity model
2. CMS-Wave - Spectral wave transformation model
3. CMS-PTM - Particle tracking model

• Finite Volume Method - Mass conservative
• Non-uniform Cartesian Grid - Easy to setup and run
• Supports most common types of forcing and boundary conditions
• Robust numerical schemes for reliable, crash-free simulations
• Parallelization on desktop computers for fast computation
• User-friendly interface

System Components

• CMS-Flow

CMS-Flow is a coupled hydrodynamic and sediment transport model capable of simating depth-averaged circulation, salinity and sediment transport due to tides, wind and waves. The hydrodynamic model sovles the conservative form of the shallow water equations and includes terms for the Coriolis force, wind stress, wave stress, bottom stress, vegetation flow drag, bottom and friction, and turbulent diffusion. There are three sediment transport models available in CMS: a sediment mass balance model, an equilibrium advection diffusion model, and non-equilibrium advection-diffusion model. The salinity transport is simulated with the standard advection diffusion model and includes evaporation and precipitaion. All equations are solved using the Finite Volume Method on a non-uniform Cartesian grid. For additional information on CMS-Flow visit CMS-Flow Main Page.

• CMS-Wave

The CMS-Wave is a spectral wave transformation model and solves the steady-state wave-action balance equation on a non-uniform Cartesian grid. It considers wind wave generation and growth, diffraction, reflection, dissipation due to bottom friction, whitecapping and breaking, wave-wave and wave-current interactions, wave runup, wave setup, and wave transmission through structures. For additional information information on CMS-Wave visit CMS-Wave Main Page.

• CMS-PTM

The CMS-PTM is a Particle Tracking Model capable of introducing and following the trajectory of discrete particles in the flow field. The PTM model is useful for determining sediment pathways, residence times, etc. For more information on CMS-PTM visit CMS-PTM Main Page

Documentation Portal

Technical Documentation CMS-Flow Hydrodynamics Governing Equations Bottom Friction Eddy Viscosity Wind and Atmospheric Pressure Precipitation and Evaporation CMS-Flow Sediment Transport Equilibrium Total Load Equilibrium Bed load plus AD Suspended load Total load Non-equilibrium Sediment Transport Hard Bottom Variable D50 CMS-Flow Salinity Transport CMS-Flow Structures CMS-Wave Governing Equations Breaking Diffraction Structures Wave generation Wave-current interaction Wave-wave interaction Coupling of CMS-Flow and CMS-Wave

User Guide Getting Started Tutorials Frequently Asked Questions Boundary Conditions Water Surface Elevation Water Surface Elevation and Velocity Tidal Constituent River Flow Salinity Global Forcing Wind Wave Transport Options Sediment Transport Total Load Equilibrium Sediment Transport Equilibrium Bed load plus AD Suspended load Total load Non-equilibrium Sediment Transport Salinity Transport Other Processes Bottom Friction Hard Bottom Variable D50 Eddy Viscosity Other Features Parallelization -- Animation Units of Measurement

Examples and Applications Test Cases Applications Previous Projects Current Projects User Group

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External Links:

• US Army Engineer Research and Development Center - Ongoing Research [1]
• Presentations
  • Coastal Modeling System (CMS) for Integrated Calculation of Waves, Flow, Sediment Transport, and Morphology Change [2]
  • Introduction to CMS-Wave [3]
  • Additional information on CMS-Flow capabilities [4]
  • CMS-Wave Demonstrations to Louisiana (Levees & Muddy coast) [5]
  • Future of the CMS [6]

• Aug 2008 Two-Dimensional Depth-Averaged Circulation Model CMS-M2D: Version 3.0, Report 2, Sediment Transport and Morphology Change [7]

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