地形分類情報を用いた液状化ハザード評価基準の再考

Abstract

Landform classification data are useful for assessing land liquefaction. Koarai et al. (2013) suggested a comprehensive risk assessment table for land liquefaction by combining 7.5-arc-second Japan engineering geomorphologic classification data (Wakamatsu and Matsuoka, 2009) with seismic intensity. The Geospatial Information Authority of Japan (2007) suggested a risk assessment standard for land liquefaction using land condition data produced by the Geospatial Information Authority of Japan. Our new hazard assessment standard for land liquefaction is based on land condition data and a risk assessment table produced by Koarai et al. (2013). Furthermore, a landform classification and hazard assessment standard of land liquefaction is suggested to create a simple land liquefaction hazard map. This information allows land liquefaction hazard to be assessed from land condition data or 7.5-arc-second Japan engineering geomorphologic classification data and to interconvert both land liquefaction hazard assessments.