A STUDY ON INFLUENCES OF NUMERICAL CONDITIONS OF TSUNAMI SIMULATION AND CHARACTERISTICS OF TSUNAMI PROPAGATION OF THE 2011 OFF THE PACIFIC COAST OF TOHOKU EARTHQUAKE TSUNAMI IN TOKYO BAY

Abstract

 This paper presents a study on influences of computational conditions on numerical simulation of Tsunami generated by the 2011 off Tohoku-Pacific earthquake. In Tokyo bay, the characteristic reaction of water elevation to the Tohoku tsunami was studied. A relationship between the own natural period of Tokyo bay and the wave period of the tsunami was discussed. Two points on computational conditions are dealt with for the comparison of computational accuracy. The first one is the difference of shape of the initial wave, i.e. difference of the fault models. The second one is the difference of area of computational domain. Each of computational results were compared with observed water elevation in Tokyo bay. Influences of the differences on the accuracy of the tsunami simulation in Tokyo bay were declared from results.