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All Journal Bulletin of Scientific Contribution : Geology IJOG : Indonesian Journal on Geoscience Jurnal RISET Geologi dan Pertambangan Jurnal Ilmiah Dinamika Rekayasa (DINAREK) Journal of Geoscience, Engineering, Environment, and Technology JLBG (Jurnal Lingkungan dan Bencana Geologi) (Journal of Environment and Geological Hazards) Indonesian Journal of Chemistry Buletin Sumber Daya Geologi Indonesian Journal on Geoscience Indonesian Journal on Geoscience Journal La Lifesci Edu Cendikia: Jurnal Ilmiah Kependidikan Jurnal Multidisiplin Madani (MUDIMA) Journal of Geosciences and Applied Geology
Boy Yoseph Cahya Sunan Sakti Syah Alam
Fakultas Teknik Geologi, Universitas Padjadjaran
Agriculture, Biological Sciences & Forestry Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Physics Social Sciences Other

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Identifikasi Gerakan Tanah (Longsor) di Kabupaten Garut, Jawa Barat Sabila, Zahra Syahida; Sukiyah, Emi; Alam, Boy Yoseph Cahya Sunan Sakti Syah; Zakaria, Zufialdi
Bulletin of Scientific Contribution Vol 16, No 1 (2018): Bulletin of Scientific Contribution GEOLOGY
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (940.793 KB) | DOI: 10.24198/bsc.v16i1.16779

Abstract

Wilayah Kabupaten Garut, Provinsi Jawa Barat merupakan bagian dari zona gerakan tanah di Indonesia bagian barat. Indonesia bagian barat dibentuk akibat  pengaruh tumbukan dua lempeng tektonik yaitu Indo-Australia dan Eurasia. Zona tersebut juga merupakan zona gempa dan zona gunungapi. Tanah residu yang tebal pada lereng dan curah hujan yang cukup tinggi di Jawa Barat merupakan salah satu penyebab daerah rawan longsor. Hal ini menjadi kendala bagi pengembangan wilayah Kabupaten Garut. Potensi gerakan tanah (longsor) pada daerah berlereng di Kabupaten Garut perlu mendapatkan perhatian. Sistem peringatan dini diperlukan untuk mengurangi  potensi  kebencanaan geologi gerakan tanah sehubungan dengan berbagai kegiatan atau proyek yang sudah ataupun akan dikembangkan.Kata Kunci: tektonik, gerakan tanah, sistem peringatan dini
KENDALI GEOLOGI TERHADAP POLA ALIRAN AIRTANAH BEBAS DAN TERKEKANG DALAM EVALUASI POTENSI AKIFER, STUDI KASUS DAERAH PANDAAN DAN SEKITARNYA, KABUPATEN PASURUAN, JAWA TIMUR Reza, Teuku; Hendarmawan, .; Alam, Boy Yoseph Cahya Sunan Sakti Syah
Bulletin of Scientific Contribution Vol 18, No 1 (2020): Bulletin of Scientific Contribution : GEOLOGY
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1351.396 KB) | DOI: 10.24198/bsc.v18i1.26399

Abstract

Geological control has been examined on the pattern of groundwater flow from free and confined aquifer in the evaluation of aquifer potency in case study in the Pandaan and surrounding areas, Pasuruan Regency, East Java. Groundwater elevation (MAT) measurement data of dug wells, borehole pumping tests, 1D geoelectricity, and wellbore log results indicate that groundwater flow patterns from free and confined aquifers have the same flow direction from southwest to northeast indicating that the distribution hydrogeological units of both aquifers are relatively homogeneous. The depths of the free aquifer from 1 to 6 meters with sand and tuffaceous sand lithology. Confined aquifer from a depth of 40 meters with a thickness between 20 to 70 meters. The aquifer unit is a tuff breccias rock from the Mt. Arjuna Welirang and Tuf Rabano Formation, aquiclude units in the form of andesite lava from Mt. Arjuna Welirang. Potential confined aquifer evaluated from pumping test has a transmissivity value between 54 - 315 m2 / day. Hydraulic conductivity (k) values are between 1.46 - 12.4 m / day. Keywords: Hydrogeological unit, transmissivity, hydraulic conductivity, aquifer, aquiclude 
Hydrogeochemical Characterization and Quality Assessment of Groundwater in Rumbai District, Pekanbaru: Implications for Sustainable Water Management Ulfa Yusti; Yoseph, Boy; Hadi Hidayat; Septio, Ghenady
Journal of Geoscience, Engineering, Environment, and Technology Vol. 10 No. 1 (2025): JGEET Vol 10 No 01 : March (2025)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2025.10.1.20942

Abstract

Groundwater is a vital source of clean water, valued for its high quality, abundant reserves, accessibility, and cost-effectiveness. As a result, effective management is crucial to ensure compliance with relevant standards. However, rapid population growth and increasing human activities have raised the demand for groundwater, which, in turn, impacts its characteristics. These changes can include altered composition, imbalances in autotrophic nutrients, contamination by heavy metals, and seawater intrusion. The availability of reliable groundwater quality data is essential for sustainable development in Pekanbaru City. This research aims to assess the groundwater quality in Rumbai District, explore its hydrogeochemical characteristics, and analyze the distribution of bicarbonate based on physical and chemical parameters. This study is particularly significant as there has been no previous hydrogeochemical analysis of the peatland areas in this region. The research method involves a comprehensive analysis of groundwater conditions, focusing on both physical and chemical factors. The physical condition analysis includes the organoleptic assessment of smell to detect unusual odors, color inspection, and temperature. Total Dissolved Solids (TDS) and electrical conductivity (EC) levels are also measured, providing insight into the water's biological and chemical characteristics. The chemical condition analysis includes pH testing to assess the water's acidity or alkalinity, along with major ion analysis to evaluate the concentrations of cations like calcium, magnesium, sodium, and potassium, and anions such as chloride, sulfate, bicarbonate, and nitrate. For accurate results, proper sample collection using sterilized containers is critical, along with the use of replicates and instrument calibration. Data interpretation involves comparing the findings to established water quality standards, such as those from the World Health Organization (WHO), to assess the groundwater's suitability for consumption or other uses. Based on chemical properties standardized by the Ministry of Health, such as the pH value of water still meets the standard of 7.7, Na+ with an average of all stations is 20.49 Mg/l which still meets the standard, HCO3- with an average of all stations is 59.63 Mg/l l still meets the standard, CI- with the average of all stations is 19.75 Mg/l still meets the standard, SO42- with the average of all stations is 2.81 Mg/l still meets the standard. At ST-01, ST-02, ST-03, ST-04, ST-05, and ST-09, the groundwater meets the standards based on chemical analysis but does not meet the standards based on physical analysis. Meanwhile, ST-06, ST-07, ST-08, and ST-09 meet the required water quality standards based on both physical and chemical standards. Therefore, at ST-01, ST-02, ST-03, ST-04, ST-05, and ST-09, the groundwater is not suitable for use. So based on its chemical properties it still meets quality standards but this groundwater is influenced by the physical properties of groundwater which is not suitable for use at several stations. This study identifies four types of groundwater characteristics: the Na(K)-SO4 type, found at stations ST-01, ST-02, ST-04, ST-07, and ST-04; the Na(K)-HCO3 type, found at station ST-03; the Ca(Mg)-HCO3 type, found at stations ST-05, ST-06, and ST-08; and the Ca(Mg)-SO4 type, found at station ST-10.
Interpretation of Groundwater Flow Using Fault and Fracture Density (FFD) Method in West Bandung District Dwi Suyandi Pasa Wijaya; Boy Yoseph C S S S A; Teuku Yan W M Iskandarsyah
Jurnal Multidisiplin Madani Vol. 3 No. 6 (2023): June, 2023
Publisher : PT FORMOSA CENDEKIA GLOBAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55927/mudima.v3i6.3564

Abstract

Utilization source sustainable groundwater resources is urgently needed in Lots case, with consider dynamics groundwater flow in the area the ground water is seeping water to in land from room between particle land and join form layers aquifer is one type ground The Fault and Fracture Density (FFD) approach was used in study this Method mapping geology used For know type and distribution rock as well as existence appearance geology in the area research Research results state that there is Trough and back Hill become target withdrawal alignment Density Fault and Fracture (FFD). There are 2 structures geology form fault valleys and faults Cibeleng results FFD analysis and geology in the area research Flow path land move from east -west, then changed direction being northwest -southeast following the red zone on the FFD map of the study area When the red zone is the density zone alignment high morphography there is Lots working crackas a flow medium groundwater groundwater flowstarting in layers lava rock which is akifug but in the lava layer is a zone of high structural density so become area catchment sectionfrom later surface watersenter through formed fractureBecause density structure high geology
Characteristics of Groundwater Hydrochemistry and Stable Isotopes (δ18O & δ2H) in Cadasari, Banten, Indonesia Hidayat, Hadi; Yoseph, Boy; Muda Iskandarsyah, Teuku Yan Waliana
Journal of Geoscience, Engineering, Environment, and Technology Vol. 10 No. 02 (2025): JGEET Vol 10 No 02 : June (2025)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2025.10.02.21531

Abstract

Groundwater is an essential resource for drinking and domestic use, displaying significant diversity in volcanic regions.This study focuses on Cadasari, Banten, Indonesia, and aims to determine the hydrochemical characteristics of groundwater and the stable isotopes (δ18O & δ2H). Hydrogeological mapping was employed, and analytical data were collected from 20 groundwater sources, including springs, rivers, and wells, at elevations ranging from 167 to 928 meters above sea level. The hydrochemical analysis revealed various groundwater types, such as Ca-HCO3, Ca+Mg-HCO3, Na+K+Ca-HCO3, and Na+K+Ca-Cl. These variations in groundwater types are attributed to differences in volcanic lithofacies. Gibbs and Gaillardet’s diagrams indicate that water-rock interaction processes primarily influence the variability of these groundwater facies in Cadasari, highlighting the significant role of silicate minerals in the groundwater's geochemistry. The isotopic composition of borehole samples shows an average isotope ratio of -7.0 ‰ for δ18O and -41.7 ‰ for δ2H, while dug well samples have average ratios of -6.1 ‰ for δ18O and -34.9 ‰ for δ2H. Spring samples exhibit an average isotope ratio of -6.7 ‰ for δ18O and -39.3 ‰ for δ2H. The isotopic composition across the groundwater samples suggests that the water in this area is of meteoric origin.
Gambaran Entrepreneurial Self-Efficacy pada Mahasiswa UNPAD yang Menjalani Magang MSIB: Entrepreneurial Self-Efficacy Overview of UNPAD Students Undergoing MSIB Internship Puspita Adhi Wijayanti; Rosaria Mita Amalia; Boy Yoseph Cahya Sunan Sakti Syah Alam
Edu Cendikia: Jurnal Ilmiah Kependidikan Vol. 4 No. 03 (2024): Research Articles, December 2024
Publisher : ITScience (Information Technology and Science)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47709/educendikia.v4i03.5268

Abstract

Entrepreneurial self-efficacy (ESE) is quite essential for starting a business. Many MSIB participants are interning at companies, which concerns the UNPAD Career Development Center regarding students' ESE. The study was conducted using a survey method: distributing a Google Forms questionnaire to the interns. The online process was used considering the location of the participants, who were spread out because they were undergoing an internship. The survey results showed that most students had relatively high ESE scores. The analysis of the difference test showed no significant difference in the scientific cluster and parental background, but the Science and Technology and Agrocomplex clusters had the highest average interest. Students with parents who work as entrepreneurs also have a higher level of confidence than students with parents who work as civil servants or private employees, BUMN and BUMD. Students' interest in entrepreneurship and ESE also show a significant relationship so that self-confidence will impact their interest in entrepreneurship, and they are expected to survive and develop. Parents' jobs and asking students to influence students' confidence in entrepreneurship. In addition, the Science and Technology and Agrocomplex clusters showed higher self-confidence in entrepreneurship. This study suggests providing entrepreneurial containers/opportunities for students to improve their entrepreneurial skills. In addition, a mentoring program is also needed to help students survive in their businesses and develop them into bigger businesses.
Co-Authors Andi Agus Nur Arief Nur Muchamad Asri Arifin Bakti, Hendra Bombom Rahmat Suganda -, Bombom Rahmat Suganda Deden Zaenudin Mutaqin Dwi Suyandi Pasa Wijaya Emi Sukiyah Endah, Raras Euis Tintin Yuningsih Faizal Muhammadsyah Febriwan Mohammad Gumilar Utamas Nugraha Hadi Hidayat Handayani, Lina Hendarmawan Hendarmawan Hendarmawan, . Hendra Bakti Iskandarsyah, Teuku Yan W. M. Ismawan T. -, Ismawan T. Khoirullah, Nur Lina Handayani Lubis, Rachmat Fajar Mega Fatimah Rosana Mohamad Sapari Hadian Mohammad Sapari Dwi Hadian Muhammad Kurniawan Alfadli Nana Sulaksana Nandian Mareta Nofi Muhammad Alfan Asghaf Nugraha, Gumilar Utamas Nursiyam Barkah -, Nursiyam Barkah Pradnya Paramarta Raditya Rendra Pradnya Raditya Rendra, Pradnya Raditya Pranantya, Pulung Arya Pulung Arya Pranantya Puspita Adhi Wijayanti Rachmat Fajar Lubis Rachmat Fajar Lubis Raden Irvan Sophian Rasi Prasetio Reza, Teuku Rizki, Afdal Rosaria Mita Amalia Sabila, Zahra Syahida Satrio Satrio Septio, Ghenady Taat Setiawan, Taat Teuku Yan W M Iskandarsyah Teuku Yan Waliana Muda Iskandarsyah Teuku Yan Waliyana Muda Iskandarsyah Ulfa Yusti Undang Mardiana Wijaya, Dwi Suyandi Pasa Wijayanti, Puspita Adhi Yudi Rahayudin -, Yudi Rahayudin Yusi Firmansyah, Yusi Zufialdi Zakaria