Model Coupling

Introduction

CMS-Flow and CMS-Wave can be run separately or coupled together using a process called steering. The variables passed from CMS-Wave to CMS-Flow are the significant wave height, peak wave period, wave direction, wave breaking dissipation, and radiation stress gradients. CMS-Wave uses the update bathymetry, water levels, and currents from CMS-Flow. The time interval (constant) at which CMS-Wave is run is called the steering interval. First, the CMS-Wave model is run for the first two time steps (time = $t$ and time = $t+\Delta t_{w}$) and the wave information is passed to CMS-Flow. CMS-Flow then interpolates the wave variables from during the first run until it reaches $t+\Delta t_{f}+\Delta t$

     $\eta (x,y,t+\Delta t)={\bar {\eta }}(x,y,t)$  

where

Symbol	Description	Units
$\eta$	Water surface elevation	m

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