学会誌「自然災害科学」

自然災害科学50 Vol.18,No.2, 1999, p165f

【速報】[Preliminary Report]

1999年6月29日に広島市周辺で発生した豪雨災害の特徴

Characteristics of Heavy Rainfall Disasters in Hiroshima Prefecture on June 29, 1999

牛山 素行*・里深 好文*・海堀 正博**

Motoyuki USHIYAMA*, Yoshifumi SATOFUKA* and Masahiro KAIBORI**

Abstract

The heavy rainfall disasters occurred mainly in Hiroshima Prefecture on June 29th, 1999. The death toll in the whole country was 41. This damage is the biggest after the typhoon disasters in September 1993. The maximum daily precipitation around Hiroshima City was about 260 mm and the maximum hourly precipitation was about 70 mm. These records became one of the highest records around Hiroshima City. The heavy rainfall area was local; the area with more than 200 mm daily precipitation was about 10 km (east-west), 30 km (north-south). Most of the dead persons were killed by the sediment disasters. There are 5,960 hazardous place for steep slope failure and 4,930 dangerous streams of debris flows in Hiroshima Prefecture, which are the highest in Japan. Based on this event, it is necessary to construct warning and evacuation system, to examine a way of land use and so on in the future.

キーワード:

豪雨災害，梅雨前線，土石流，都市災害，広島県

Key words:

heavy rainfall, Bai-u front, debris flows, urban disasters, Hiroshima Prefecture
*
京都大学防災研究所水災害研究部門
Disaster Prevention Research Institute, Kyoto University
**
広島大学総合科学部
Faculty of Integrated Arts and Sciences, Hiroshima University