Investigation on Resistance of Earth Bank and Reduction by Dug Pool against Tsunami

Abstract

Based on the field surveys in the 2011 Off the Pacific Coast of Tohoku Earthquake, the resistant function of earth banks and the reducing function of the dug pools against Tsunami flood have been indicated by the authors. In this paper, the above functions of earth banks and dug pools have been discussed applying both experimental studies and analytical simulations. As the results of this study, the erosion resistance of earth banks, the flood characteristics such as depth and flow velocity at the back side of earth banks and the function of dug pools to reduce the active force by Tsunami flood can be discussed. Furthermore, the technical possibilities to apply both earth banks and artificial canals proposed as the new countermeasures against Tsunami can be shown.