Abstract
A questionnaire type survey was conducted among Nagasaki city residents whose homes had been completely destroyed when a disaster was caused by heavy rain. Then real conditions of damages to the above mentioned peoples are intended to explain through an analysis of cross tabulated data. It is concluded as follows: (1) Most of completely-destroyed-houses are located on the slopes with an inclination above 8 degrees. (2) Mortality rate from geological hazards and floods is about 20 %. (3) In babies, little children, and the aged, who are called the weakings during disasters, the mortality rate from geological hazards and floods (28 %) is comparatively high. (4) The difference of mortality rates between a geological hazard and a flood is large. (5) Though the evacuation rate from geological hazards (21 %) is low, an evacuation is effective for the reduction of mortality. (6) It is necessary for the reduction of human damages to give inhabiants the notice of the real conditions of geological hazards, having caused the great numbers of the dead and injured. (7) Still, it is necessary to assess the risk of geological hazards.
