FloodMap is a coupled 1D/2D flood inundation model designed for fluvial flood inundation prediction in topographically complex floodplains. The model is the basis of the sub-grid treatment approach and its parallel version FloodMap-Parallel (Yu, 2010) and has been tested and verified with a range of boundary conditions and in a number of environments (e.g. Yu, 2005; Tayefi et al., 2007; Lane et al., 2007; Lane et al., 2008; Yu and Lane, 2011; Yu and Yin, in review). The coupled model assumes that the floodplain is protected by an embankment that essentially acts as a continuous, broad-crested weir through which flow exchange occurs between the channel and floodplain. A tightly-coupled approach solves the one-dimensional river flow and two-dimensional floodplain flows simultaneously in a raster environment. The one-dimensional in-channel model solves the full Saint-Venant equations for unsteady open-channel flow using the Preissmann scheme based upon the fixed bed model of Abbott and Basco (1989).
The model can be run either from command line or in its GUI mode. The interface is intuitive and designed for ease. Run-time visualization is another feature that aids modelers to interpret model simulations.