Author:

Publisher:

Published: 2006

Total Pages: 216

ISBN-13:

This report, the second in a series, describes upgrades of the two-dimensional circulation model CMS-M2D developed under the Coastal Inlets Research Program (CIRP) conducted at the U.S. Army Engineer Research and Development Center, Coastal and Hydraulics Laboratory. The upgrades chiefly concern capability to calculate sediment transport and morphology change at coastal inlets, navigation channels, and adjacent beaches. CMS-M2D is operated as part of the CIRP's Coastal Modeling System (CMS) that couples calculations of wave transformation, circulation (horizontal currents and water surface elevation), sediment transport, and morphology change. The coupling is interactive and accomplished within a graphical user interface called the Surface-water Modeling System (SMS). Within the SMS, the CMS contains menus and steering modules that allow specification of input and output, as well as the time steps for and degree of interaction among the various processes. The SMS also contains utilities for viewing data and calculation results, monitoring progress of simulations, and running of project level CMS-M2D applications with tidal and surge forcing as provided by a regional circulation model. CMS-M2D is computationally efficient, easy to set up, and has features required for many coastal engineering applications at coastal inlets and at the bays and beaches adjoining inlets. Example features include robust flooding and drying, wind-speed dependent (time-varying) wind-drag coefficient, variably-spaced bottom-friction coefficient, time- and space-varying wave-stress forcing, efficient grid storage in memory, and two hot-start options. Three sediment-transport formulations are available for selection by the user, two involving total load formulations and one involving calculation and transport by bedload and suspended load in an advection-diffusion equation approach.