AN ANALYSIS ON DISASTERS CAUSED BY FLOOD VIA DATA FROM SENTINEL-1 SATELLITE

Abstract

From every flood occurred in Thailand, Thai people had to encounter with damages against their assets, houses, commercial buildings, factors, and agricultural areas. Sukhothai Province is also one of those areas that have encountered with flood every year. Therefore, this study aims to analyze disasters caused by flood via data from Sentinel-1 Satellite: a case study of Sukhothai Province, Thailand. For methodology, data from Sentinel-1 Satellite in the studied areas were analyzed by using SNAP and ArcGIS program. The results of data analysis revealed that data on August 25, 2020, indicated that there was a flood area, i.e., 96.751 km². When comparing data on flood obtained from analyzing with data on flood obtained from Geo-Informatics and Space Technology Develop-ment Agency (GISTDA) with approximate flood areas of 106.632 km², it was found that difference was around 9.593%. For geography, it was also found that Sukhothai Province has a river that flew through the province from the north to the south with the approximate distance of 170 km that was considered as the cause of repeated flood, especially areas in Sri Satchanalai District, Sawankaloke District, Muang Sukhothai District, and Kongkrailat District, Thailand.