Non-Hydrostatic Wave Model NHWAVE User’s Guide for Modeling Submarine Landslide Tsunami ( Version 1.1)

This report provides a user’s guide for operation of the non-hydrostatic wave model NHWAVE in application to generation of submarine landslide-induced tsunami waves. NHWAVE was de-veloped by Ma et al. (2012) for modeling fully dispersive surface wave processes. It solves the non-hydrostatic Navier-Stokes equations in a domain over a surface and terrain in the sigma co-ordinate system. Tsunami waves generated by a prescribed submarine landslide can be directly simulated by taking advantage of the σ coordinate system. The model assumes a single-valued water surface and represents turbulent stresses in terms of an eddy viscosity closure scheme. For tsunami wave applications in the present report, turbulent stresses are not modeled, and thus the model is basically solving the Euler equations for incompressible flow with a moving surface and bottom. NHWAVE has been benchmarked in Tehranirad et al. (2012) for tsunami application us-ing PMEL-135 benchmarks provided by Synolakis et al. (2007), and a landslide benchmark developed from results in Enet and Grilli (2007). This report provides a user’s manual for land-slide applications only. A brief description of model theory, numerical scheme and landslide configuration is also included in the report. The model setup and results presented here rep-resent testing of Version 1.1 of the code, and will be updated online a