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All Journal Jurnal Geocelebes J SIG (Jurnal Sains Informasi Geografi) Jurnal Bina Pengabdian Kepada Masyarakat
Valentin, Ferdio
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Pengaruh Serta Cara Penanggulangan Dampak dari Erupsi Gunung Anak Krakatau Terhadap Ekosistem Sekitar Valentin, Ferdio; Theressia Githa Aurora; Kadek Ramanda; Hesti Sahaja; Nandi Haerudin
Jurnal Bina Pengabdian Kepada Masyarakat Vol 4 No 1 (2023): Jurnal Bina Pengabdian Kepada Masyarakat
Publisher : Sekolah Tinggi Olahraga dan Kesehatan Bina Guna

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55081/jbpkm.v4i1.1184

Abstract

Gunung api merupakan salah satu faktor penyebab bencana alam dan Indonesia merupakan negara dengan aktivitas vulkasnisme yang tinggi dikarenakan berada pada batas lempeng aktif yang saling bergerak dan bertumbuk. Salah satu gunung berapi aktif hingga saat ini adalah Gunung Api Anak Krakatau yang berada pada wilayah Selat Sunda, Lampung Selatan, Lampung. Tingkat resiko bahaya tinggi memerlukan peran mitigasi yang memadai, oleh karena itu penelitian ini membahas peran penting dan usaha mitigasi yang dilakukan terhadap dampak erupsi kepada ekosistem wilayah sekitar Gunung Anak Krakatau. Zona rawan bencana Gunung Anak Krakatau dibagi berdasarkan 3 zona dengan radius 2-8 km. Ekosistem laut seperti terumbu karang akibat erupsi mengalami pemulihan dan semakin baik dan beraneka ragam macamnya. Mitigasi structural juga dilakukan dengan pembuatan hutan lindung. Sedangkan mitigasi non-structural dengan pembuatan peta sebaran area dan pembuatan poster serta sosialisasi kepada masyarakat untuk menumbuhkan jiwa kepedulian dan kepekaan terhadap potensi bahaya erupsi Gunung Anak Krakatau.
Subsurface Interpretation of the Panjang Fault Area, Lampung, Based on Geomagnetic Method Rasimeng, Syamsurijal; Fahruddin, Fahruddin; Valentin, Ferdio; Aurora, Theressia Githa; Nurlaili, Jesica
JURNAL GEOCELEBES Vol. 8 No. 1: April 2024
Publisher : Departemen Geofisika, FMIPA - Universitas Hasanuddin, Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/geocelebes.v8i1.28303

Abstract

Research on the area along the Panjang Fault - Lampung, the area from the Teluk Betung to Tanjung Karang Barat area using the 19-T GSM PPM tool with base rover acquisition on 2 tracks 2 kilometers apart obtained 40 acquisition points with a spacing of 0.3 kilometers. This study aims to determine the type of lithology and subsurface rock structure by utilizing the susceptibility value of rocks from magnetic anomalies. In the process of processing magnetic anomaly data, upward continuation is carried out as high as 350 m which is intended to reduce the total anomaly with the upward anomaly results so that a residual anomaly is obtained. Next, make a 2D subsurface model on the incision A - B in the residual anomaly map. Based on the results of qualitative interpretation, the total magnetic anomaly of the research area illustrates positive to negative anomaly values with a tighter contour pattern that indicates the presence of a fault structure. While based on quantitative interpretation, the 2D modeling in incision A - B shows a susceptibility value of 0.100 cgs which can be identified as breccia tuff rock, a susceptibility value of 0.0391 cgs is thought to be rhyolitic tuff rock, pumice tuff rock, and sandstone tuff, and a susceptibility value of 0.150 cgs is a rock from the intrusion of Mount Betung in the form of andesite-basalt lava. In addition, rocks with a susceptibility value of 0.0024 cgs are metamorphic rocks. The correlation between 2D modeling and regional geology is seen in the research area, which is in the Tarahan Formation (Tpot), which is suspected to be a fault structure in the Bumi Waras area with a strike direction of NW - SE which is the course of geothermal manifestations or minerals.
PENENTUAN KELAYAKAN ALIH FUNGSI LAHAN BEKAS TAMBANG BATUBARA LAPANGAN X TANJUNG ENIM BERDASARKAN CITRA SENTINEL-2 Valentin, Ferdio; Sitompul, Ivana Jayarani; Fahlefi, M. Reza; Dani, Ilham
J SIG (Jurnal Sains Informasi Geografi) Vol 7, No 1 (2024): Edisi Mei
Publisher : Universitas Muhammadiyah Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31314/jsig.v7i1.2702

Abstract

Coal exploitation in Tanjung Enim, Muara Enim Regency, South Sumatra Province is still being conducted. Some of the 7621 hectares of land that is a coal mining production area is no longer used and leaves ex-mining land. Ex-mining land that is left open will affect the ecosystem and harm the surrounding community, so it is necessary to change the function of ex-mining land. The purpose of this research is determining the feasibility of changing the function of the former mining area. The data used is data from the Sentinel-2 satellite by utilizing band 4, band 8, and band 11 to produce a vegetation index from the Normalized Difference Vegetation Index (NDVI) and a fire index from the Normalized Burn Ratio (NBR) in 2019, 2021, and 2023. The threshold value used to declare the research area suitable for land use changes is -0.2 for n and 0.1 for m. From the data processing, it is found that the  NDVI 2019 is 0.3 and -0.1 for NBR 2019, 0.24 for NDVI 2021 and -0.104 for NBR 2021, and 0.19 for NDVI 2023 and -0.108 for NBR 2023. Values of NDVI that are greater than the threshold (n) and values of NBR that are smaller than the threshold (m) indicate the feasibility of the land use change. This leads to the conclusion that the research area is suitable for conversion of land use.
Co-Authors Aurora, Theressia Githa Dani, Ilham Fahlefi, M. Reza Fahruddin Fahruddin Hesti Sahaja Kadek Ramanda Nandi Haerudin Nurlaili, Jesica Rasimeng, Syamsurijal Sitompul, Ivana Jayarani Theressia Githa Aurora