1999 年 52 巻 1 号 p. 35-40
A very severe rainfall event occurred at Sado district in Niigata prefecture on August 4, 1998. About 23 houses were damaged, but no person was dead. The purpose of this study is to investigate how inhabitants were evacuated by themselves from slope failures and mud flows caused by the heavy rainfall, to learn useful lessons for developing proper warning and evacuation system.