SIMULATION OF TSUNAMI RUNUP IN A RIVER USING THE GENERALIZED COORDINATE SYSTEM ~REPRODUCTION OF THE 2011 OFF THE PACIFIC COAST OF TOHOKU EARTHQUAKE TSUNAMI IN TONE RIVER~

Abstract

 This study simulated a tsunami runup in the virtual simple river and in Tone River using the generalized coordinate system and the Cartesian coordinate system models. The research's purpose was to understand the characteristics of the water level and to improve the simulation's precision of a tsunami runup in a river.
 The computed results of the virtual simple river indicated that the water level using the Cartesian coordinate system model is different from the actual phenomenon along the levee. Whereas, the calculated water level using the generalized coordinate system model is closer to the actual phenomenon.
 The results of the reproduction simulation of The 2011 off the Pacific Coast of Tohoku Earthquake Tsunami in Tone River showed that the water level using the generalized coordinate system model is more accurate than that of the Cartesian coordinate system model, based on the comparison of the computations and observations at 18.0 kilometer post (down the estuary barrage).