[M-IS14] [JJ] Geopark

[MIS14-P14] Research into Digital Archival concerning Disaster Monuments in the Izu Peninsula

*makoto kumagai^1,2, Yusuke Suzuki³, Hideyuki Itoh⁴, Hinako Suzuki⁵, Shinichi Sugimoto² (1.Graduate School of policy studies, Iwate prefectural University, 2.Sanriku Geopark Promotion Council, 3.Izu Peninsula Geopark Promotion Concil, 4.Faculty of policy studies, Iwate prefectural University, 5.National Research Institute for Earth Science and Disaster Resilience)

Keywords:Monuments, Digital Archives, Izu Peninsula, Genroku Kanto Earthquake tsunami, Tokai earthquakes, Tonankai earthquakes

In the Sanriku Region, past tsunamis and the lessons we learned from them appear on stone monuments throughout the area.However, stone monuments for tsunamis leading up to and including that which followed the 1896 Sanriku earthquake tunami are already over 100 years old and are significantly weathered. In particular, stone monuments made with such material as sandstone and granite have significant surface weathering, and the inscriptions in many cases are difficult to make out. Such deterioration in readability due to weathering and other factors will occur to stone monuments in other regions, and there are concerns that other such monuments, including for the Genroku Kanto Earthquake tsunami in the Izu Peninsula, will also suffer from decreased readability. Further, about half of the tsunami stone monuments in the Sanriku Region suffered from flooding in the Great East Japan Earthquake, and most of these were damaged or washed away. The Izu Peninsula area is the region that will again suffer damage from tsunamis due to Tokai and Tonankai earthquakes, and we believe there is a need to preserve information on the stone monuments vulnerable to damage beforehand. In this regard, along with ascertaining the possibility of damage to stone monuments related to disasters in the Izu Peninsula, this research conducted collection, ordering and digital archiving of information on the stone monuments including details of the inscriptions, position information and three-dimensional data using photographs.