Abstract
Due to March 11th, 2011 Tohoku Earthquake Tsunami, both the disaster prevention problem against tsunami and the energy generation came into view. With the aim of solving the two problems, “Coastal Inverse Dam Project” was established led by Kyoto University. Coastal Inverse Dam is the structure designed to store renewable electricity set on the sea bed and has a huge box-like space open to the surface, so the structure is expected to have an effect on disaster mitigation by tsunami damping. However, there has been no examination of the tsunami damping effect. In this study, considering an assumed Nankai Trough Earthquake Tsunami, we calculate and evaluate the effect of tsunami damping according to water elevation behind the Coastal Inverse Dam by applying a 2D3D Hybrid model. We find that the dam has the measurable effect of declining water elevation, and the height on the coast in its vicinity.
