This research aims to analyze the damage of coastal forests in the Pacific coast of the Tohoku region (Ofunato city in Iwate prefecture, Natori city in Miyagi prefecture and Minamisoma city in Fukushima prefecture) affected by tsunami of the Great East Japan Earthquake occurred on March 11, 2011. In order to clarify the actual situation of coastal forests, literature survey and interview survey were conducted. Furthermore, by using the geospatial information, we verified the geographical factors of disaster, such as forest conditions and topography, forest position from shoreline, the relationship between the tide breakwater and the tsunami inundation and the forest damage by the tsunami. As a result, it was revealed that topographical situations greatly influenced the tsunami flooding, and structures such as the tide wall could affect on suppression of flood expansion and damage to the forest. On the other hand, it was found that undulations such as the embankment along the coast were able to have an adverse effect on the drainage after the flood. In the future, it is considered that utilization of aerial photographs and foundation map information will be effective for visualizing and clarifying the actual situation of wide area affected by a disaster.
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