Abstract
ALOS-2/PALSAR-2 data is not affected by the weather, it is expected to know the damage of the dis-aster because it observes the sky over Japan twice a day and night. Extraction of the flooded area using the backscatter coefficient image obtained by SAR data has already been studied for practical use. However, in urban areas and forest areas, there are few places where the ground surface can be directly observed, and it is difficult to know the flooded area with only SAR data. On the other hand, there is a flooding analysis that estimates the flooded area by hydraulic method.
In this study, a method of extracting a flooded area combining SAR data and flooding analysis was proposed. And it applied to actual flood damage. As a result, it was shown that the proposed method can extract flooded area in urban area.
