雲仙岳に大規模な土石流を発生させた豪雨の特徴

概要

論文の詳細を見る
Heavy rainfalls over the Shimabara district in Nagasaki Prefecture have frequently caused violent debris flows associated with the eruption of Mt. Fugen at Unzen for recent several years. The most serious debris flows took place on 28 April and 18 June in 1993. The purpose of this study is to reveal the structure and formation of these heavy rainfalls using an RHI radar. The main results can be summarized as follows. (1) The individual rain-cells which attacked Mt. Unzen appeared near the Nagasaki Peninsula and developed over the Tachibana Bay and the Shimabara Peninsula. (2) These strong rain-cells moved to the direction of ENE with velocity of 60?70 km/h. (3) The careful look-out for the western sea region is most essential for preventing the disaster of violent debris flow in the Shimabara district.
日本自然災害学会の論文
1997-05-31