DEMONSTRATION OF FLOOD DETECTION USING SATELLITES DURING THE KYUSHU FLOODS IN JULY 2020

Abstract

 Against frequent flooding occurring simultaneously in a wide area, the early detection of flooding damage leads to the appropriate rescue, disaster relief, and early recovery. This paper reports on the results of the demonstration of the satellite use during the heavy rain of July 2020 in Kyushu and the current issues of satellite-based damage assessment resulted from the reproduced analysis of past floods. To solve the current issues of satellite application for damage assessment, we verified two possible solutions; the use of wide-area imaging mode and the use of images taken with different bands and orbits. Based on the results of the verifications, this paper also reports the effectiveness of those satellite-based damage assessment methods.