6:15 PM - 7:30 PM
[HDS27-P16] Effect of uncertainty in offshore tsunami heights on the probability inundation hazard assessment
Keywords:tsunami, inundation, hazard assessment, probability
We propose an approach of assessing inundation hazards considering the potential of overflow using a practical example of tsunami inundation hazard in Rikuzen Takata City, Iwate. First, we examine the correlation distribution of offshore tsunami heights and inundation height, and and calculate an approximate straight line. We assume the approximation line as a model for predicting tsunami inundations from offshore tsunami heights. Using the tsunami hazard curve calculated at the offshore site and the approximation line, we can estimate the tsunami inundation hazard curve for the potential of overflow. Comparing with the tsunami inundation hazard curve for the results which over coastal levee, we discuss the effect of uncertainty in offshore tsunami heights.
This study was conducted by a part of research project in NIED for tsunami hazard assessment for the whole of Japan.