Hindcast simulation of 2011 great east japan earthquake tsunami

Abstract

We proposed a rapid method for forecasting tsunami runup on the coasts combining 2-D numerical model and 1-D analytical runup theory. In the first step, the 2-D numerical simulations of tsunami generation and propagation are performed assuming impermeable boundary conditions of a 5-10m depth at the last sea points (equivalent to a wall). Then the time series of the water oscillations on the wall are used to calculate the runup heights using the analytical integral expression following from 1-D theory. The feasibility of this approach was validated against the disastrous 2011 Great East Japan Earthquake Tsunami. We have demonstrated that the proposed approach is more reasonable and rapid method of forecasting than complicated coastal inundation models