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Journal : Indonesian Journal on Geoscience

Investigation of Geothermal Using Magnetotelluric Method in Babakan Bogor, Bengkulu Province, Indonesia Farid, Muhammad; Hadi, Arif Ismul; Sari, Lusi Puspita
Indonesian Journal on Geoscience Vol 8, No 2 (2021)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17014/ijog.8.2.221-231

Abstract

DOI:10.17014/ijog.8.2.221-231Bengkulu Province, due to be crossed by Bukit Barisan Mountains has relatively large geothermal reserves. This study aims to investigate the geothermal reserves in Babakan Bogor Village, Kepahiang Regency, Bengkulu Province. The magnetotelluric (MT) method with electric and magnetic sensors was used to record data in the fields. The electric sensor consisted of three porous pots, two of which were placed horizontally (Ex, Ey) and the other one vertically (Ez) as the ground. Magnetic sensors with two coils were placed horizontally (Hx, Hy) and one vertically (Hz). The data obtained in the field are in the form of rock resistivity values which are correlated with geothermal potential, so that the reservoir could be determined. Data recording in the fields used low frequencies, i.e. 128 Hz. Data processing was done using MAPROS software to convert time-series data to EDI file types. Input data in the MAPROS software is in the form of apparent resistivity vs. depth values. Furthermore, an inversion was carried out to obtain the true resistivity value as the output of the software. ZONDMT1 and ZONDMT2 were used to model the resistivity values in one dimension (1D) and two dimensions (2D). The results showed that there were geothermal reserves in the Babakan Bogor Village, Kepahiang Regency, at a depth of 1,500 to 5,000 m.
Landslide Potential Investigation for Disaster Risk Reduction in Central Bengkulu Regency, Bengkulu Province, Indonesia Hadi, Arif Ismul; Refrizon, Refrizon; Farid, Muchammad; Harlianto, Budi; Sari, Julia Inti
Indonesian Journal on Geoscience Vol 8, No 3 (2021): in-press
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17014/ijog.8.3.313-328

Abstract

Bengkulu Province is the converging path region between the Indo-Australian - Eurasian tectonic plates in the ocean and the Sumatran f ault crossing on the mainland. The condition implies that the sliding force of the slab is easy to trigger fractures and to cause the material to be relatively less elastic, resulting in high seismic intensity. This study aims to identify areas with the potential for landslides and its mapping, and to analyze the factors that cause landslides in Central Bengkulu Regency, Bengkulu Province, Indonesia. This study was conducted using rock physical parameters of ground shear strain (GSS) which were correlated with parameters of slope, slope height, Vs30 value, fault distance to measurement point, rock conditions, rainfall, and PGA value. Furthermore, these parameters were overlaid thoroughly by the statistical method of the Analytical Hierarchy Process (AHP). Data acquisition is divided into two stages, namely the secondary data collection stage and the field survey stage. Secondary data collection was carried out to support the creation of landslide potential maps, analysis, and field survey data input. Secondary data is the value of Vs 30, the distance of the fault to the measurement point, rainfall, and the PGA value. Field survey data are in the form of GSS values, slope, slope height, and rock conditions. The results of this study are identified areas that have the category of high, medium, and low landslide potential. Based on the calculated parameters, the GSS parameter is the most dominant which affects the landslide potential in the studied area.
Co-Authors Agung Sedayu Al Ansory, Andre Rahmat Al-Ansory, Andre Rahmat Andre Rahmat Al Ansory Anggi, Arya Putra Ansory, Andre Rahmat Al Arrahma, Mawadatul Ashar Muda Lubis Awaliyah, Isfardian Agustin Darmawan Ikhlas Fadli Darmawan Ikhlas Fadli Darmawan Ikhlas Fadli Efriyadi Efriyadi Elfi Yuliza Fadillah Humairah Fadli, Darmawan Ikhlas Falenia, Felly Farid, Muchammad Farid, Muchammad Farid, Muchammad Farid, Muhammad Febri Adrianto Adrianto Frinsyah Virgo Giltro Kencoro Gumanty, Usman Halauddin Halauddin Halauddin Hana Raihana Hardiansa, Debi Hardiansyah, Debi Hardianza, Meno Harlianto, Budi Helinnes, Putri Herliana Herliana Hesna Nurliana Hilmi Zakarya Ikhlas Fadli, Darmawan Indri Novtrisa Insani, Redha Radiatul Isfardian Agustin Awaliyah Johan, Septi Julia Inti Sari Kamila, Nur Husniatin Khairul Amri Kirbani Sri Brotopuspito Kirbani Sri Brotopuspito Larang, Miranda Puspa Lindung Zalbuin Mase Lizalidiawati Lizalidiawati Lusi Puspita Sari M Farid M. Dahlan M. Farid Maghribi, Faritz Bagda Malik Krisbudianto Marzuki Marzuki Melly Angglena Mohtar Mohtar Muammar, Zaky Muchammad Farid Muchammad Farid Muchammad Farid Muda Lubis, Ashar Muhammad Farid Muhammad Farid Muhammad Farid Natasya, Indah Dwi Nur Husniatin Kamila Nurul Hudayat Nurul Hudayat Nurwijayanti Paisal Edo Putri, Aisyah Cindy Phylia Putri, Elona Gita Gatra Rabbani, Muhammad Rifqi Rafly, Tegar Al Rahmat Al-Ansory, Andre Rahmawati, Nurul 'Ilmi Rahmawati, Nurul Ilmi Raihana, Hana Refrizon Refrizon Refrizon Refrizon Refrizon Refrizon Refrizon Refrizon Refrizon Refrizon Refrizon Refrizon Refrizon, Refrizon Refrizon, Refrizon Rena Misliniyati Rida Samdara Rida Samdara Sapanur, Destika Meisy Saragih, Ronni Samuel Sari, Julia Inti Sari, Julia Inti Sari, Lusi Puspita Sesilia, Tiara Siagian, Samuel Suhendra Suhendra Suhendra Suhendra Sumanjaya, Erlan - Sumariyah Sumariyah Suwarsono Suwarsono Suwarsono Suwarsono Suwarsono Suwarsono Sya’adah, Isni Taufiqurrahman Syah, Muhammad Wahyudi Wahyudi Wahyudi Wahyudi Yudhi Harini Bertham, Yudhi Harini Yuni Setyowati Zulfia Memi Mayasari