Abstract
This paper presents numerical simulation results for the run-up Tsunami in Tone River caused by the 2011 off the Pacific coast of Tohoku Earthquake. 2-dimensional shallow water equations are solved with unstructured triangular meshes which can express the shore topography smoother and in more detail. Calculation scheme is based on a cell centered finite volume method using modified Roe's approximate Riemann solver which can handle the moving wet/dry fronts correctly. The simulation results are verified by time series of water surface level measured at some water gauge stations located in the river as well as data collected by survey of flooding trace after the Tsunami. Propagation and deformation characteristics of the tsunami waves are discussed in detail by the results of numerical simulation.
