SPECTRAL CHARACTERISTICS OF FLASH FLOOD AREAS FROM MEDIUM SPATIAL OPTICAL IMAGERY

Muhammad Priyatna, Muhammad Rokhis Khomarudin, Galdita Aruba Chulafak, Sastra Kusuma Wijaya

Abstract

This study aims to investigate surface reflectance changes over flash flood areas in Nusa Tenggara Timur, Indonesia. Fifteen sample points from Sentinel-2 satellite imagery were used to analyse the differences in reflectance of areas before and after flash flood events. The method used involved analysis of the significant differences in the dreflectance values of each Sentinel-2 channel. The analysis results show that channels 6, 7, and 8A displayed significant differences compared to the others with regard to reflectance before and after flooding, for both settlements and shrubs. The results could be used for further research in building a reflectance index for the rapid detection of affected areas, with a focus on these channels.

Keywords

Reflectance, flash flood, disaster, bush, and settlement

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References

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DOI: http://dx.doi.org/10.30536/j.ijreses.2021.v18.a3666

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