Analysis of the intensity of burned areas from Sentinel-2 satellite imagery. Case study of Doi Suthep-Pui National Park

Abstract

The purpose of this research is to demonstrate the results of studies of combustion areas from Sentinel-2 satellite imagery. Together with processing with QGIS program to create a map for analyzing the burn severity using the forest fire incident in mid-March 2020, Chiang Mai Province of Thailand as a case study. By downloading Sentinel-2 satellite images from https://earthexplorer.usgs.gov In two periods is The months of November 2019 are pictures before the forest fire and the months of April 2020 is after a wildfire. And then processing the intensity of burning (Burn Severity) by using the QGIS program to process. As a result of the processing, there are many steps in the process of processing that take more time than necessary and have been modified by creating a model designer in QGIS program to reduce the process and time of work. After processing the combustion severity values, displayed as raster data, were converted to polygon data in order to indicate the extent of the combustion area. The combustion index (dNBR) was calculated by classifying data into 7 severity levels. According to USGS, the obtained data were compared with heat points with FRP value> 30 on Chiang Mai province in the same area. Therefore, the results of this study can be used to map the burned area mapping for application in disaster management and to develop it for other sciences. 30 in Chiang Mai in the same area Therefore, the results of the study can be used to map the burned area mapping for application in disaster management and to develop it for other sciences. 30 in Chiang Mai in the same area Therefore, the results of this study can be used to map the burned area mapping for application in disaster management and to develop it for other sciences.

Key Terms: Sentinel-2 Satellite, Combustion Severity, QGIS Program, Model Designer, Combustion Index, FRP (fire radiative power)