A severe rainfall more than 200 mm per 3 hours in the dawn of 20 July 2003 brought the severe boulder disaster over the Minamata city and Hishikari town located in the southwest of Kyushu Island Japan, which claimed 22 people’s lives.This study is aims to investigate the characteristics of the mesoscale meteorological systems bringing such sediment disasters, using various kinds of meteorological datasets. Two independent precipitation systems hit the South Kyushu: one is the mesoscale cloud cluster rapidly evolved to the south of the Gotou Islands on the East China Sea, and another is the orographical rainband evolved on the leeward of the Koshikijima Islands. The horizontal SST gradient and the momentum convergence of the lowlevel atmosphere plays an important role in the evolution of the each system.
Congress of Asian and Pacific Regional Division of the International Association for Hydraulic Research (15th : 2006.8.7-10 : Madras, Chennai, India)
雑誌名
Proceedings of the 15th Congress of Asian and Pacific Regional Division of the International Association for Hydraulic Research (IAHR'06)
Mesoscale meteorological systems due to boulder flow disaster over South Kyushu Japan on 20 July 2003
ktanaka-Kuma.pdf
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