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http://dx.doi.org/10.7780/kjrs.2021.37.5.3.4

Detection of Forest Fire Damage from Sentinel-1 SAR Data through the Synergistic Use of Principal Component Analysis and K-means Clustering  

Lee, Jaese (Department of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology)
Kim, Woohyeok (Department of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology)
Im, Jungho (Department of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology)
Kwon, Chunguen (Department of Forest Environment and Conservation, Division of Forest Fire and Landslide, National Institute of Forest Science)
Kim, Sungyong (Department of Forest Environment and Conservation, Division of Forest Fire and Landslide, National Institute of Forest Science)
Publication Information
Korean Journal of Remote Sensing / v.37, no.5_3, 2021 , pp. 1373-1387 More about this Journal
Abstract
Forest fire poses a significant threat to the environment and society, affecting carbon cycle and surface energy balance, and resulting in socioeconomic losses. Widely used multi-spectral satellite image-based approaches for burned area detection have a problem in that they do not work under cloudy conditions. Therefore, in this study, Sentinel-1 Synthetic Aperture Radar (SAR) data from Europe Space Agency, which can be collected in all weather conditions, were used to identify forest fire damaged area based on a series of processes including Principal Component Analysis (PCA) and K-means clustering. Four forest fire cases, which occurred in Gangneung·Donghae and Goseong·Sokcho in Gangwon-do of South Korea and two areas in North Korea on April 4, 2019, were examined. The estimated burned areas were evaluated using fire reference data provided by the National Institute of Forest Science (NIFOS) for two forest fire cases in South Korea, and differenced normalized burn ratio (dNBR) for all four cases. The average accuracy using the NIFOS reference data was 86% for the Gangneung·Donghae and Goseong·Sokcho fires. Evaluation using dNBR showed an average accuracy of 84% for all four forest fire cases. It was also confirmed that the stronger the burned intensity, the higher detection the accuracy, and vice versa. Given the advantage of SAR remote sensing, the proposed statistical processing and K-means clustering-based approach can be used to quickly identify forest fire damaged area across the Korean Peninsula, where a cloud cover rate is high and small-scale forest fires frequently occur.
Keywords
SAR; PCA; K-means clustering; Forest fire damaged area; dNBR;
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Times Cited By KSCI : 6  (Citation Analysis)
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