Japan Geoscience Union Meeting 2018

Presentation information

[JJ] Oral

M (Multidisciplinary and Interdisciplinary) » M-IS Intersection

[M-IS12] Geopark

Mon. May 21, 2018 1:45 PM - 3:15 PM 103 (1F International Conference Hall, Makuhari Messe)

convener:Takayuki Ogata(Disaster Prevention Research Center for Island Regions, University of the Ryukyus), Takeyuki Ueki(Faculty of Risk and Crisis Management, Chiba Institute of Science), Marekazu Ohno(島原半島ジオパーク協議会事務局, 共同), Keiichi Tadokoro(Research Center for Seismology, Volcanology and Earthquake and Volcano Research Center, Nagoya University), Chairperson:Tadokoro Keiichi, Aoki Tatsuto(金沢大学地域創造学類)

2:30 PM - 2:45 PM

[MIS12-04] Natural hazards from the geological and geomorphological point of view; A case study in the Oita Bungooono Geopark

*Toshikazu Yoshioka1 (1.Oita Bungoono Geopark Promotion Council)

Keywords:Natural hazard, Disaster prevention, Geology, Geomorphology, Geopark

Many natural hazards have occurred in the Oita Bungoono Geopark in these two years, such as the Kumamoto earthquake in April 2016, the landslide in the Watada area in 2017, and the flood caused by the typhoon no. 18 in September 2017. Some sites of this Geopark have been damaged by these hazards. For example, the cliff of the columnar-jointed welded tuff beside the Todoro Bridge collapsed down by the Kumamoto earthquake, and the Todoroki Bridge destroyed by the flood of the typhoon no. 18.
In this way, natural hazards cause damages to sites, however they are geological and geomorphological phenomena and they have formed the land of the Geopark. The Aso pyroclastic flow that is the main subject of this Geopark just caused a much severe damage if a human being was alive at that time. Repeated floods caused deep valleys, waterfalls and cliffs. Many stone bridges were built across these valleys and many stone Buddha figures carved on these cliffs.
The activity of Geopark makes the citizens interest in the geology and topography of the district, and it may lead to improving awareness of disaster prevention.