Analysis Of The Impact Of The Eruption Of Mount Lewotobi Laki-Laki On Air Quality In East Nusa Tenggara Based On The Determination Of Hot Spots And Sulfur Dioxide Levels In The Air Using Google Earth Engine

UNSPECIFIED (2025) Analysis Of The Impact Of The Eruption Of Mount Lewotobi Laki-Laki On Air Quality In East Nusa Tenggara Based On The Determination Of Hot Spots And Sulfur Dioxide Levels In The Air Using Google Earth Engine. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Gunung Lewotobi merupakan salah satu gunung berapi aktif yang berada pada Kecamatan Wulanggitang, Kabupaten Flores Timur, Nusa Tenggara Timur. Gunung Lewotobi Laki-Laki pada November 2024 telah terdeteksi menunjukkan aktivitas vulkanik yang cukup tinggi. Aktivitas vulkanik tersebut terdeteksi mengeluarkan sumber emisi gas vulknaik serta semburan lava yang signifikan yang dapat mempengaruhi kualitas udara, bangunan dan ekosistem di sekitarnya. Evaluasi emisi SO₂ dan area panas dianalisa menggunakan data penginderaan jauh dari Sentinel-5P (TROPOMI), Sentinel-2 (MSI) dan Landsat- 8 (OLI). Pengolahan data menggunakan platform Google Earth Engine untuk mendapatkan analisaspasial dan temporal dari kandungan SO₂ di udara serta sumber panas yang dihasilkan melalui aktivitas vulkanik. Metode Normalized Hotspot Indices (NHI) diterapkan untuk mengidentifikai dan memetakan area panas yang dihasilkan aktivitas vulkanik. Hasil kadar SO₂ yang dihasilkan menunjukkan nilai maksimum sebesar 300.831 µg/m³ dan rata-rata sebesar 71,928 µg/m³ yang terjadi pada 9 November 2024. Klasifikasi sebaran titik panas yang ditunjukkan berada pada rentang tinggi hingga sedang menuju rendah. Total jumlah titik panas yang terukur sebesar 51 titik pada Landsat-8 dan 278 titik pada Sentinel-2. Hasil uji statistik yang dilakukan data Landsat-8 tidak terdapat nilai yang cukup signifikan dari pengukuran SO₂ terhadap pengukuran area panas dan berbanding terbalik terhadap hasil pengukuran Sentinel-2.
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Mount Lewotobi is one of the active volcanoes located in Wulanggitang District, East Flores Regency, East Nusa Tenggara. In November 2024, Mount Lewotobi Laki was detected to show high volcanic activity. The volcanic activity was detected to emit significant sources of volatile gas emissions and lava flows that can affect air quality, buildings and surrounding ecosystems. The evaluation of SO₂ emissions and hot areas was analyzed using remote sensing data from Sentinel-5P (TROPOMI), Sentinel-2 (MSI) and Landsat-8 (OLI). Data processing uses the Google Earth Engine platform to obtain spatial and temporal analysis of SO₂ content in the air and heat sources generated through volcanic activity. The Normalized Hotspot Indices (NHI) method was applied to identify and map hot areas generated by volcanic activity. The resulting SO₂ levels showed a maximum value of 300,831 µg/m³ and an average of 71,928 µg/m³ which occurred on November 9, 2024. The classification of the distribution of hotspots shown is in the high to medium to low range. The total number of hotspots measured was 51 on Landsat-8 and 278 on Sentinel-2. The results of statistical tests carried out on Landsat-8 data did not have a significant value of SO₂ measurements on hot area measurements and were inversely proportional to the results of Sentinel-2 measurements.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	Area Termal, Emisi vulkanik, Google Earth Engine, Kualitas udara, Normalized Hotspot Indices (NHI), Penginderaan Jauh, Sulfur Dioksida (SO₂), Air quality, Google Earth Engine, Normalized Hotspot Indices (NHI), Remote sensing, Sulfur Dioxide (SO₂), Thermal area, Volcanic emissions
Subjects:	G Geography. Anthropology. Recreation > G Geography (General) > G70.212 ArcGIS. Geographic information systems. G Geography. Anthropology. Recreation > G Geography (General) > G70.217 Geospatial data G Geography. Anthropology. Recreation > G Geography (General) > G70.5.I4 Remote sensing T Technology > TR Photography > TR267.733.M85 Multispectral imaging
Divisions:	Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Geomatics Engineering > 29101-(S2) Master Thesis
Depositing User:	Febryanto Pratama
Date Deposited:	15 Jul 2025 07:09
Last Modified:	22 Sep 2025 11:51
URI:	http://repository.its.ac.id/id/eprint/119802

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