東日本大震災における新聞記事及 び標高デ一タを用いた津波浸水域 の推定

摘要

In this paper, we propose a new method to estimate tsunami inundation areas using newspaper articles and elevation data. We regarded some information in each article as observation data and we estimated the inundation areas using two-dimensional spline interpretation. Next, we assumed that inundation areas estimated using conventional methods are true values. And then, we confirmed the consistency between the inundation areas estimated using our method and true values which are estimated using the remote sensing and the field investigation. We obtained the following results: (1) The new method is sufficiently useful, but (2) the method has some faults. The consistency was quite low in some areas, mainly because of low-resolution elevation data or low-resolution observation data (articles). Finally, we demonstrated a means to overcome the faults and to improve consistency.