INVESTIGATION ON HOUSE DAMAGE OF MID-NIIGATA PREFECTURE EARTHQUAKE AND CORRELATION ANALYSIS WITH GEOMORPHOLOGICAL LAND CLASSIFICATION

Abstract

This study developed the house damage data-base of Mid-Niigata prefecture earthquake on Geographical Information System (GIS) and investigated the correlation between house damage and geomorphological land classifications. It is noted that the damage ratio of house was accurately assessed through GIS by using both house damage data-base and house data-base. Consequently, house hazard could be objectively discussed against the geomorphological land classification. It was concluded that house hazard generally decreased with distance from the earthquake epicenter, but it kept high in alluvial fan. The property of house damage distribution was keenly discussed quantitatively with various indexes.