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All Journal Jurnal Geosaintek Eksplorium : Buletin Pusat Pengembangan Bahan Galian Nuklir
Agustin, Erisa
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Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Energy Engineering Materials Science & Nanotechnology

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ANALISIS KERAWANAN LONGSOR SEBAGAI UPAYA MITIGASI MENGGUNAKAN SISTEM INFORMASI GEOGRAFIS DI DAERAH LAMPUNG BARAT Mulyasari, Rahmi; Agustin, Erisa; Yuniza, Nani; Haerudin, Nandi; Riduan, Riduan
Jurnal Geosaintek Vol. 10 No. 2 (2024)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25023659.v10i2.1733

Abstract

The West Lampung area is an area that is prone to landslides, this is due to the high intensity of rainfall and unstable soil structure. In 2022 and 2023, landslide disasters occurred in the West Lampung area which resulted in many losses, so it is necessary to carry out a landslide vulnerability analysis as an anticipatory measure for landslide control measures. By utilizing a geographic information system, geological data, slope, soil type, rainfall and land cover to display areas that are indicated to be prone to landslides. Based on the results of spatial analysis of each landslide-causing parameter, it produces 3 levels of landslide susceptibility classes, namely areas not prone to landslides (95.48 km2), areas prone to landslides (85.85 km2) and areas very prone to landslides (155.43 km2). In areas that are indicated to be vulnerable and very vulnerable, it is necessary to carry out mitigation on sloping areas and land use in these areas.
Identification of Basalt Rock Distribution Using Resistivity Geoelectric Method in The National Capital City (IKN), Paser, East Kalimantan Sopan, Langnanda Ekakurnia Putri; Agustin, Erisa; Kuncoro, Kirana Helga Aimee; Sarkowi, Muh; Kuswanto, Agus; Kumalasari, Isti Nur; Mulyasari, Rahmi
EKSPLORIUM Vol. 45 No. 2 (2024): NOVEMBER 2024
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/eksplorium.2024.7081

Abstract

The construction of the National Capital City (IKN) is currently being carried out in East Kalimantan, resulting in increased demand for construction materials. Basalt is among the rocks that can be used as construction material in IKN. This rock has a high economic value due to its high demand but limited quantity. Basalt exploration around IKN is carried out to acquire rock resources and reduce construction costs due to its proximity to the site. This study aims to determine the distribution of basalt in the Kuaro area, East Kalimantan. The geology of the research area is composed of the Ultramafic Complex Formation, which comprises gabbro, basalt, serpentinite, and harzburgite. This research uses the Wenner-Alpha configuration geoelectric method to identify the distribution of basalt in the subsurface. Geoelectric measurements were carried out on six measurement lines, each line length of 470 m and electrode spacing of 10 m. The results of geoelectric data analysis show that the basalt has a specific resistivity value ranging from 200–4022 Ωm. Basalts were identified at depths of 10–75 m with 145 m, 325 m, 165 m and 183 m thicknesses in lines 1, 2, 5 and 6, respectively. The presence of basalt in lines 3 and 4 is at a depth of 10–75 m with an average thickness of 153 m and 125 m, respectively. Economically, basalt rocks in this area are classified as medium to highly recommendable for exploitation.
Co-Authors Agus Kuswanto Kumalasari, Isti Nur Kuncoro, Kirana Helga Aimee Muh Sarkowi Mulyasari, Rahmi Nandi Haerudin Riduan Riduan, Riduan Sopan, Langnanda Ekakurnia Putri Yuniza, Nani