Japan Geoscience Union Meeting 2023

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Poster

O (Public ) » Public

[O-06] Poster presentations by senior high school students

Sun. May 21, 2023 1:45 PM - 3:15 PM Poster (Exhibition Hall 8, Makuhari Messe)

convener:Tatsuhiko Hara(International Institute of Seismology and Earthquake Engineering, Building Research Institute), Katsuyoshi Michibayashi(Department of Earth and Planetary Sciences, Nagoya University), Miwa Kuri(Japan Meteorological Agency), Keiko Konya(Japan Agency for Marine-Earth Science and Technology)

On-site poster schedule (2023/5/21 13:45-15:15)

1:45 PM - 3:15 PM

[O06-P34] Verification of the safety of shelters close to mountains

*Karen Takahashi1, Kazuteru Ishimori1, Kuga Yuta1, Kurokawa Eisu1 (1. Sapporo Kaisei secondary school)

Keywords:debris flow, hazard map, Sediment concentration


Over the past few years, there have been many cases of mudslides occurring on days of record-breaking rainfall. This study focuses on mudslides and aims to verify whether the scale of damage caused by mudslides assumed by hazard maps is correct. Mudslides are large amounts of fluid sediment and water flowing at speeds of 20-40 km/h and have the power to destroy houses and fields in an instant. As there is a precedent of a mudslide in Sapporo city, we consider that something on the scale of a fatal event may occur in Sapporo and its suburbs. In hazard mapping, hazard zones for mudslides are delimited at points where the gradient is 2° or more. Hence, an attempt was made to identify the damage caused by the mudslides envisaged by the hazard maps and the safety of the evacuation sites.