Identification of drought level using normalized difference latent heat index on Maros Watershed

Abstract

Abstract One of the impacts of climate change is drought. Drought is a hydrological problem that significantly affects survival on earth. This study aims to identify drought through the approach of one of the indices related to water, namely Normalized Difference Latent Heat (NDLI). NDLI values were obtained through a multispectral Landsat OLI calculation process, namely band 3 - green, band 4 - red, and band 6 – SWIR. Each band interprets variables related to heat and water content. The coverage area of research is in the Maros watershed, which is one of the watershed supplying water to the city of Makassar. Maros watershed has an area of ± 72,000 ha with relatively high human activity. NDLI values range from +1 to -1, where positive values indicate areas with good water content with latent heat and poor water content. In Maros watershed, NDLI values ranged from 0.37 to -0.25. Based Drought classification level, the level of drought in Maros watershed is moderately wet to moderately drought, and mildly wet is the most extensive drought levels in Maros watershed.

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