CD Skripsi
Analisis Indeks Kekeringan Metode Normalized Difference Drought Index (Nddi) Berbasis Citra Satelit Menggunakan Google Earth Engine (Gee) Di Kabupaten Pelalawan
ABSTRACT
Indonesia as a tropical country has a high risk of hydrometeorological disasters,
one of which is drought that often occurs in various regions. This study aims to
analyze the level of drought and its relationship with the distribution of hot spots in
Pelalawan Regency using Sentinel-2 satellite imagery through the Google Earth
Engine (GEE) platform with the Normalized Difference Drought Index (NDDI)
method. The resulting NDDI value was then tested for correlation with hotspot data
using the Spearman method to determine the relationship between drought level
and fire potential. The results of the analysis show that there is a significant
variation in annual drought during the 2019 2024 period. The years 2019 2021
were dominated by severe drought with NDDI values ranging from 0.32 0.35 and
wide area coverage. In 2022, there was a drastic decrease to the level of mild
drought (0.13), which was influenced by cloud cover in satellite imagery. The year
2023 showed almost normal conditions with an average NDDI of 0.06, while the
year 2024 experienced fluctuations with a trend towards severe drought by the end
of the year. In general, the dynamics of drought in this region are influenced by
seasonal factors and atmospheric disturbances that affect the quality of satellite
imagery. The Spearman correlation test showed a weak relationship between NDDI
values and the number of hotspots. This indicates that drought may contribute to
an increased risk of fires, although not significantly. Other factors, such as human
behavior and land management, also affect the potential for forest and land fires in
Pelalawan Regency.
Keywords: Drought Index, GEE, Hotspot, NDDI, Pelalawan Regency.
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