Abstract
In this study, a simple method is proposed to extract inland flooding hazardous area by using 5m resolution DEM, which is freely offered by GSI (Geospational Information Authority of Japan). Catchment area is estimated in two ways; flow accumulation analysis in a plain. Potential inflow amount is estimated by counting the number of pixels located along a upper flow of the target pixels. The number of higher elevation pixles is also counted in the surrounding of the target pixels as a flooding hazardous areas.
