2019 Volume 75 Issue 2 Pages I_167-I_175
A large-scale sector collapse occurred on Anak Krakatau Island in Indonesia in December 2018. The tsunami caused by sector collapse caused a serious damage to the coastal area. In this study, the interpretation investigation of topographic change by volcanic activity and sector collapse and extraction of tsunami damaged area in the coastal area were evaluated using observation information by Sentinel-2 satellite, Landsat-8 satellite, and Sentinel-1 satellite. The topographic change of Anak Krakatau island was effectively evaluated by using optical and SAR satellite images together. The tsunami damage area of the surrounding coastal area was extracted from the NDVI values before and after the disaster where the cloud cover area was corrected. It was appropriately evaluated by referring to the visual interpretation results. In addition, the interpretation characteristics and availability to tsunami disasters were evaluated by MTC images. It was considered that this method was effectively used from these results to evaluate the schematic in large-scale disaster.
