著者

牛山 素行 吉田 淳美

出版者

日本自然災害学会

雑誌

自然災害科学 (ISSN:02866021)

巻号頁・発行日

vol.24, no.4, pp.487-497, 2006-02-28

被引用文献数

6

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A heavy rainfall caused by typhoon No. 0514 (Nabi, GLIDE: TC-2005-000154-JPN) and a stationary front occurred in Japan from September 4 to 8, 2005. A 1238-mm, 48-hour precipitation was recorded at Mikado in Miyazaki prefecture. This was the highest recorded precipitation of all observatories administered by the Japan Meteorological Agency since 1979. Based on data from the agency, the highest 24-hour precipitation records in the last 25 years were revised at 56 observatories, and the highest 48-hour precipitation records were revised at 64 observatories as a result of this rainfall. However, there was no observatory where the highest 1-hour precipitation was revised. In this heavy rainfall, 2,834 houses were destroyed and 21,834 houses were inundated; most of the property destruction was caused by inundation. In total, 29 persons were killed or missing in 8 prefectures: 13 in Miyazaki prefecture, 5 in Kagoshima, 4 in Ohita, 3 in Yamaguchi and 4 in others. Of these deaths, 22 were attributable to sediment disaster. On the other hand, in Hinokage town, Miyazaki prefecture, there were no deaths even though a large number of houses were destroyed. This is because all the residents had taken refuge at least 6 hours before the flood and debris flow occurred. It should be noted that in Miyazaki city, an electronic bulletin board system (BBS) administered by the city office was helpful. Whenever a resident used the BBS to ask a question, the city office replied within several minutes. With this system, information was exchanged efficiently and there were no incidences of online vandalism. This example showed the potential for official disaster BBSs in Japan.