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All Journal Indonesian Journal of Geography Bulletin of Scientific Contribution : Geology Jurnal Ilmiah Aplikasi Isotop Radiasi Jurnal Kawistara : Jurnal Ilmiah Sosial dan Humaniora IJOG : Indonesian Journal on Geoscience Jurnal RISET Geologi dan Pertambangan Journal of Degraded and Mining Lands Management Jurnal Teknik Sipil Jurnal Ilmiah Dinamika Rekayasa (DINAREK) Journal of Geoscience, Engineering, Environment, and Technology Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources) JLBG (Jurnal Lingkungan dan Bencana Geologi) (Journal of Environment and Geological Hazards) Indonesian Mining Journal Indonesian Journal of Chemistry Buletin Sumber Daya Geologi Jambura Geoscience Review JURNAL TEKNIK HIDRAULIK Indonesian Journal on Geoscience Indonesian Journal on Geoscience Sawala : Jurnal pengabdian Masyarakat Pembangunan Sosial, Desa dan Masyarakat Pusaka : Journal of Tourism, Hospitality, Travel and Business Event Jurnal Geominerba Journal of Tourism Education Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources) Indonesian Mining Journal Jurnal Kawistara
Hendarmawan Hendarmawan
Fakultas Teknik Geologi, Universitas Padjadjaran
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The Integration of Geochemical Characteristics and Stable Isotopes Analyses of δ2H and δ18O in the Paleogene Carbonate Rocks Unit of the M-Field, Ciputat Sub-Basin, North West Java Basin, Indonesia Syarif Kurniawan; Hendarmawan Hendarmawan; Yoga A. Sendjaja; Euis Yuningsih
Jurnal Geologi dan Sumberdaya Mineral Vol. 21 No. 2 (2020): JURNAL GEOLOGI DAN SUMBERDAYA MINERAL
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v21i2.504

Abstract

The Paleogene carbonate unit in the North West Java Basin has no cropped out and never been shown in the regional stratigraphy, whether as a formation or as a member of the existing formation. This paper provides new insight of the diagenetic process evidence by the stable isotope of 2H and 18O in formation fluids integrated with petrographic and geochemical data of rock and fluids samples analysis. The major minerals of this carbonate unit are: calcite, clay minerals, dolomite, quartz, plagioclase, and pyrite. From ICP-OES analyses result this carbonate rocks has the content of Fe, Mg and Al ranges 450-7800 ppm, 497-10892 ppm and 96-3900 ppm respectively, while Si and Sr are relatively low around 0.1 ppb to 0.7 ppm and 60 ppm to 570 ppm respectively. Formation water chemistry data shows the total charges for cation and anion were relatively balanced from 75.5 to 396.8 meq, the TDS from 4,904 mg/l to 22,351 mg/l, and SG from 1.005 to 1.016 and were dominated by elements of Na, Ca, Mg, Cl and HCO3. The δ2H and δ18O from water samples are between -26.2 to -37.2 (‰) and between -3.63 to 2.50 (‰) respectively. With all the correlation of geochemical and isotope data of both rock and water indicate that the Paleogene Carbonate system in the M-Field has been through at least once uplifting and one sea water rise/drowning event, with meteoric water affected diagenetic process. These geological processes shown by the calcite cementation, the presence of pyrite and quartz, recrystallization of the carbonate grains and mylonitic dolomite, high content of Mg, Fe and Al, and also the abruptly change of the δ13C and δ18O values.Keywords: Paleogene carbonate, geochemistry, water chemistry, stable isotope, diagenesis.
Pemodelan Karakteristik Aliran Airtanah Sistem Porous dengan Uji Permeabilitas, Porositas dan Kompresibilitas Batuan pada Fasies Gunungapi Gede-Pangrango Bagian Tenggara Davin Rizqa Haris Suryana; Hendarmawan Hendarmawan; Teuku Yan Waliyana
Jurnal Geologi dan Sumberdaya Mineral Vol. 23 No. 1 (2022): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v23i1.563

Abstract

Pengertian mengenai geometri keterdapatan airtanah di bawah permukaan, merupakan hal yang penting untuk diketahui. Dengan memahami sifat fisik batuan akuifer maka permasalahan karakteristrik dan sifat airtanah akan lebih mudah untuk dijelaskan. Tujuan studi ini untuk mengidentifikasi litologi apa saja yang dapat menjadi media penyusun akuifer primer (media porous) berdasarkan nilai permeabilitas, porositas dan kompresibilitas batuan penyusun daerah studi, serta bagaimana karakteristik aliran primer air tanahnya berdasarkan model sistem air tanah. Metode yang dilakukan untuk peenyelidikan ini antara lain, uji permeabilitas, porositas, dan kompresibilitas batuan kemudian dipadukan dengan metode statistik kuartil, pemodelan geolistrik, dengan pembagian kategori batuan berdasarkan hasil uji laboratorium batuan. Hasil uji laboratorium batuan dan hasil analisis statistik dengan metode kuartil, skoring dan pembobotan, hasilnya adalah batuan tuf kasar dan tuf halus yang bersifat akuifer, batuan breksi grain supported dan breksi matrik supported bersifat batuan akuitar, batuan lapili bersifat batuan akuiklud, terakhir batuan lava andesit bersifat batuan akuifug. Setelah batuan akuifer dan bukan akuifer diketahui, maka blok model sistem airtanah dapat dibentuk dengan menentukan sebaran batuan berdasarkan data geolistrik. Hasil blok model disimpulkan bahwa perlapisan batuan akuifer mendominasi di fasies distal, untuk fasies medial dan proksimal didominasi oleh batuan yang bersifat bukan akuifer. Aliran airtanah yang terbaca dan terbentuk relatif mengarah ke tenggara.Katakunci: Aliran airtanah primer, ekplorasi airtanah, karakteristik aliran airtanah, pemodelan airtanah.
Geological Trap Controlling the Residence Time of Groundwater in Assessment of Exploitation Zone for Its Sustainable Resources Case Study: The Slope of Karang Mount, Banten Province, Indonesia Johanes Hutabarat; Azwar Satrya Muhammad; Teuku Yan Waliana Muda Iskandarsyah; Yudhi Listiawan; M. Ridfan Trisnadiansyah; Putu Ayu Andhira; Hendarmawan Hendarmawan
Indonesian Journal on Geoscience Vol. 10 No. 3 (2023)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17014/ijog.10.3.419-432

Abstract

The southern slope of Mount Karang is covered by complex volcanic deposits with complicated texture and structure. The study on zone or location of water resources which would be exploited required a comprehensive hydrogeological approach. Through detailed geological mapping, spring sampling, and well drilling were carried out. Representative spring water samples were taken to be analyzed in the laboratory, and to obtain the data of physical groundwater, chemical groundwater, stable isotopes 18O (oxygen-18), and deuterium contents, as well as the age of the groundwater. In general, the groundwater facies of the studied area showed Ca, Na, KHCO3 with several sites indicating changes to CaHCO3 during the dry and rainy seasons. The synthesis results of the stable isotope 18O (oxygen-18) and deuterium contents, verified by the physical and chemical groundwater controlled by geological setting in the groundwater subbasins, show the anomaly of residence time as trapped by the normal fault in the middle of the studied area. The existing normal fault might control this anomaly of residence time of groundwater surrounding site JH1, JH9, and JH20. However, the distribution of three different water source zones occurred. All group of groundwater indicated a complex flowing with geological setting controlling the physical, chemical content, and the age of the groundwater. At last, sites JH4, JH5, and JH9 show that the zones are proper to be developed as sustainability groundwater resources. Keywords: groundwater facies, stable isotope, groundwater flow, sustainable water
WASHING TEST OF KENDILO COAL USING A SINK-FLOAT METHOD TO IMPROVE ITS QUALITY Wanda Adinugraha; Nana Sulaksana; Hendarmawan Hendarmawan; Binarko Santoso; Datin Fatia Umar; Fitri Amalia
Indonesian Mining Journal Vol 21 No 1 (2018): INDONESIAN MINING JOURNAL, Vol. 21 No. 1, April 2018
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol21.No1.2018.408

Abstract

Kendilo coal is known as a high-ash content type. Beneficiating such the coal for gasification process needs to wash the coal first. The purpose of washing is to lower the ash content until the permitted amount of about 10%. Samples for coal washing were obtained from PT. Kendilo Coal Indonesia at Pasir Belengkong, Paser Regency, East  Kalimantan. The samples were taken at Bindu and Betitit Block, which containing ash of about 20%–30%. To wash the coal samples, a sink-float method was applied to test its separation characteristic. The washing process employed three sizes fraction, i.e, -12.5+5.6, -5.6+1.18, and -1.18 mm and the separation density was varied between 1.3 to 1.6 g/cc within the interval of 0.1. The liquid solutions as the separation media were made from mixing of perchloroethylene and toluene. From the coal washability curve, the best coal washing in order containing ash content of about 8% in the case of Bindu Block's coal, occurs at the fraction of -12.5+5.6 mm, at density separator of 1.36 g/cc with the recovery of 50%. While the coal of Betitit's Block, the washed coal was 50.82% at similar fraction but at different density separator of 1.39 g/cc.
VOLUMETRIK REMBESAN DALAM PERENCANAAN PEMBANGUNAN TUBUH BENDUNGAN KOLAM RETENSI X (STUDI KASUS: DAS SANGGAI, IKN) Putri, Fauziah Listiana; Listiawan, Yudhi; Hendarmawan, Hendarmawan
Bulletin of Scientific Contribution Vol 22, No 2 (2024): Bulletin of Scientific Contribution:GEOLOGY
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/bsc.v22i2.56008

Abstract

Ibu Kota Negara Indonesia yang baru akan berada pada sejumlah Kecamatan di Kabupaten Penajam Paser Utara dan Kutai Kartanegara. Penelitian ini akan fokus pada perencanaan pembangunan bendungan di Kolam Retensi X yang ada di DAS Sanggai, IKN. Dalam perencanaan pembangunannya memerlukan analisis debit rembesan yang dapat terjadi ketika bendungan sudah dioperasikan. Debit rembesan yang berlebihan akan mempengaruhi stabilitas dari bendungan dan dapat menyebabkan gejala piping. Analisis akan dilakukan pada kondisi Muka Air Rendah, Muka Air Normal, dan Muka Air Banjir. Data yang diperlukan yaitu data teknis Kolam Retensi X, gambar potongan melintang bendungan, dan hasil uji laboratorium. Debit rembesan ini dianalisis menggunakan software Geostudio SEEP/W 2012 dan metode flow net. Berdasarkan hasil analisis menggunakan Geostudio SEEP/W 2012, debit rembesan pada tubuh bendungan Kolam Retensi X pada kondisi Muka Air Rendah sebesar 1.6 × 10−9 m3 /det, Muka Air Normal sebesar 2.75 × 10−9 m3 /det, dan Muka Air Banjir sebesar 4.41 × 10−9
Impact of COVID-19 on the Global Tourism Economy Syaifudin, Arief; Hendarmawan, Hendarmawan; Novianti, Evi
Journal of Tourism Education Vol 2, No 1 (2022)
Publisher : Program Studi Pendidikan Pariwisata, Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (200.523 KB) | DOI: 10.17509/jote.v2i1.41629

Abstract

COVID-19 has paralyzed the world tourism sector. Travel restrictions (land, air, and sea), quarantine policies by the competent authorities, and physical restrictions are the main factors for cessation of tourism activities. The tourism sector that relies on individual mobility is supported by transportation modes so that when this is limited, it will have an impact on decreasing tourist visits, occupancy rates and the cancellation of a number of festivals and events that are routinely held until in the end this condition has an impact on tourism sector income. This study aims to obtain an overview of the impact of COVID-19 on the income of the tourism sector in a number of countries. Through literature studies, it is hoped that sufficient information can be obtained so that it can be used as a consideration for tourism managers in developing the concept of sustainable tourism in the future. 
PENGARUH BIDANG DISKONTINUITAS TERHADAP KESTABILAN LERENG TAMBANG STUDI KASUS : LERENG HIGHWALL PIT’X’ PT. BERAU COAL Al Kautsar, Muhammad Ilham; Khoirullah, Nur; Hendarmawan, Hendarmawan; Umboro, Sindhu
JURNAL GEOMINERBA (JURNAL GEOLOGI, MINERAL DAN BATUBARA) Vol 8 No 2 (2023): Jurnal Geominerba - 2023
Publisher : PPSDM Geominerba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58522/ppsdm22.v8i2.135

Abstract

Berau Coal is a company that currently manages open-pit coal mines, requiring geotechnical analysis. The purpose of this research is to determine the stability of slopes with and without discontinuities to understand the influence of discontinuity planes on the slopes. The method used involves classifying rock strength based on the Geological Strength Index (Marinos, 2007). In the research area, the GSI classification for sandstone and claystone ranges from <42 to >42, including classes III, IV, V, and X. Kinematic analysis, limit equilibrium analysis, and stereogram analysis are also conducted to determine the factor of safety.Based on kinematic analysis to determine the type of landslide (Wyllie & Mah, 2004), there can be a wedge failure in the highwall area. Limit equilibrium analysis is performed under two conditions: with the presence of discontinuity planes, yielding a factor of safety (FS) value of 1.636, and without the presence of discontinuity planes, yielding an FS value of 1.365. Meanwhile, the stereogram analysis yields an FS value of 3.4. In this case study, the FS value is higher when there are discontinuity planes compared to the condition without discontinuity planes. This is because the existing discontinuity planes intersect the critical slope, causing a change in the sliding plane direction towards the discontinuity plane.
Geo-Environment Aspects Assessment Applied In Land Stability Determination Of A Disaster-Prone Area: A Case Study Around The Lembang Active Fault Zone, On The Western Part Of Bandung Basin, Indonesia Iskandarsyah, Teuku Yan Waliana Muda; Brilian, Ciria Humanis; Trisnadiansyah, Mochamad Ridfan; Listiawan, Yudhi; Barkah, M. Nursiyam; Sulaksana, Nana; Hendarmawan, Hendarmawan
Journal of Geoscience, Engineering, Environment, and Technology Vol. 9 No. 3 (2024): JGEET Vol 09 No 03 : September (2024)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2024.9.3.18062

Abstract

Rainfall, landforms, lithology or soil characteristics, and geological structures are geo-environment aspects that might be used to assess stability of the land in a disaster-prone area, e.g. in a case of study around the Lembang active fault zone of the western part of Bandung Basin, Indonesia. In this study, such geo-environment aspects were weighted and scored constantly in five class of value and importance, due to its influence on the land stability. After this scoring method applied, firstly, a land capability of the research area in relation to disaster potential will be recognized and used to analyze its land stability. According to such analyses, the study area can be divided into two zones of land stability, i.e. (i) moderate area which dominates the research area, and (ii) non-stable or unstable area near Lembang active fault zone. The dominant moderate and unstable area show that the fault zone has still widely affected the surroundings landscape and its physical characteristics. In fact, the current evaluation of existing landuse show that the development has been carried out intensively on these areas. It indicates that the development of the area is contituted as a high risk activity. Therefore, in this case, a good spatial planning or an environmental good governance must be applied appropriately in such disaster-prone area.
Evaluation of nitrate in shallow groundwater at Pasirkoja of Bandung City, Indonesia, using the pollution index and the nitrate pollution index methods Naily, Wilda; Sunardi, Sunardi; Asdak, Chay; Hendarmawan, Hendarmawan
Journal of Degraded and Mining Lands Management Vol. 11 No. 4 (2024)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2024.1114.6251

Abstract

Pasirkoja is an old residential area in Bandung City currently densely populated. Some people in Pasirkoja use shallow groundwater for washing and bathing, and some for cooking. Pollutants very easily pollute shallow groundwater, and nitrate is one of the pollutants found in shallow groundwater in residential areas. The water quality status was determined using the pollution index (PI) method based on a Decree of the Minister of Environment Number 115 of 2003 and the nitrate pollution index (NPI) to ascertain the shallow groundwater quality in Pasirkoja of Bandung City, Indonesia. The variables used in the PI method were pH, turbidity, total dissolved solids (TDS), nitrate, and nitrite, while the NPI method used the nitrate parameter. Shallow groundwater samples were taken during the rainy season and dry season. Based on the PI method, the results showed that the quality status of shallow groundwater at the research location is mostly lightly polluted in the rainy and dry seasons. Meanwhile, based on the NPI method, most are clean (not polluted). Differences in the quality status of shallow groundwater depend on the environmental conditions around which shallow groundwater samples were taken. The research results also showed that, based on the PI method, nitrate is not the main parameter that determines pollution at the research location.
Geowisata dan Potensi Penguatan Komunitas pada Wisata Pasca-Tambang Open Pit Nam Salu di Belitung Timur Peranciscus Aryanto; Hendarmawan Hendarmawan; Mohamad Sapari Dwi Hadian; Evi Novianti; Syintia Faramitha
Jurnal Kawistara Vol 12, No 3 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/kawistara.73729

Abstract

Pariwisata merupakan salah satu sektor yang memberikan nilai dan manfaat bagi peningkatan perekonomian masyarakat dan mempengaruhi sektor lainnya. Oleh karena itu, perlu dilakukan identifikasi potensi wisata dan sumber daya yang ada untuk memudahkan penyusunan konsep perencanaan dan pengembangan pariwisata yang juga harus mempertimbangkan dampak positif dan dampak negatif yang dihasilkan. Dampak positif akan berpengaruh pada perekonomian masyarakat sedangkan dampak negatifnya adalah kerusakan alam dan perubahan budaya pada masyarakat. Pengembangan pariwisata perlu melibatkan masyarakat dalam mengelola keunikan dan kondisi daerah yang ada. Open Pit Nam Salu merupakan salah satu objek wisata eks tambang yang memiliki potensi menarik. Sebagai tambang timah terbesar di Asia Tenggara, kawasan objek wisata ini memiliki terowongan bawah tanah yang menjadi salah satu kegiatan yang menarik wisatawan yang berkunjung. Setiap pengunjung wajib mengikuti protokol keselamatan dan kesehatan yang ada. Obyek wisata Open Pit Nam Salu saat ini dikelola oleh Bapopnas (Badan Pengelola Open Pit Nam Salu). Dalam pengembangan kawasan ini ada beberapa kendala yang dihadapi diantaranya sarana dan prasarana serta keterbatasan sumber daya manusia pariwisata dalam mengelola kawasan ini. Penulis melakukan penelitian pengembangan kawasan ini menggunakan metode kualitatif deskriptif dengan pengumpulan data melalui wawancara dan observasi lapangan. Hasil penelitian menunjukkan bahwa pemberdayaan masyarakat yang dilakukan melalui Bapopnas, pengembangan pariwisata kawasan ini sudah menunjukkan perubahan yang terlihat dengan adanya pembangunan sarana dan prasarana, promosi dan pemasaran melalui media sosial dan keikutsertaan dalam kegiatan pelatihan.
Co-Authors Abdurrachman Asseggaf Abdurrokhim ⠀ Adjat Sudrajat Agus Didit Haryanto Al Kautsar, Muhammad Ilham Anastasia Yovita Sari Arief Syaifudin Arif Fadillah Azwar Satrya Muhammad Azwar Satrya Muhammad Bayu Nugraha Benny Joy Binarko Santoso Bombom Rachmat Suganda Bombom Rachmat Suganda Bombom Rachmat Suganda, Bombom Rachmat Boy Yoseph Cahya Sunan Sakti Syah Alam Brilian, Ciria Humanis Budi Muljana Budi Nurani Ruchjana Burhanuddin Burhanuddin Bustomi, Zhafran Muhammad Asyam Carnesia Gabema Mutiara Pangaribuan Chay Asdak Dady Sukmayadi Datin Fatia Umar Davin Rizqa Haris Suryana Deden Zaenudin Mutaqin Dicky Muslim Dyah Marganingrum E. Ristin Pujiindiyati Edi Tri Haryanto Edi Tri Haryanto, Edi Tri Emi Sukiyah Euis Yuningsih Evi Novianti Evi Novianti Faizal Muhammadsyah Febriwan Mohammad Febriwan Mohammad Fitri Amalia Hadian, M. Sapari Dwi Heri Hermiyanto Zajuli Heri Hermiyanto Zajuli, Heri Hermiyanto Hermes Panggabean Hermes Panggabean Hermes Panggabean Hermes Panggabean Ildrem Syafri Ismawan Ismawan, Ismawan Johanes Hutabarat Johanes Hutabarat Johannes Hutabarat Jumhari Jumhari Khoirullah, Nur Lambok M. Hutasoit M Sapari Dwi Hadian M. Heri Hermiyanto Zajuli M. Heri Hermiyanto Zajuli M. Nursiyam Barkah, M. Nursiyam M. Ridfan Trisnadiansyah M. Sapari Dwi Hadian M. Sapari Dwi Hadian Moch Ridfan Trisnadiansyah Moh. Heri Hermiyanto Zajuli Moh. Heri Hermiyanto Zajuli Mohamad Sapari Dwi Hadian Mohamad Sapari Hadian Mohammad Ghozi Muhammad Kurniawan Alfadli Nana Sulaksana Nana Sulaksana Nathalie Dörfliger Nofi Muhammad Alfan Asghaf NUR HAMID Nur Hamid Panji Ridwan Peranciscus Aryanto Petrus Syariman Petrus Syariman, Petrus Pradnya Paramarta Raditya Rendra Priyo Hartanto Putri, Fauziah Listiana Putu Ayu Andhira Rasi Prasetio Rizka Maria Rizka Maria Rizki Maulia Robert M Delinom Robert Mohammad Delinom Rudy Suhendar Satrio Satrio Satrio Satrio Satrio Satrio Setiawan, Taat Siti Munawaroh Suhendar, Rudy Sunardi Sunardi Sunardi Sunardi Suratman Suratman Syaifudin, Arief Syarif Kurniawan Syintia Faramitha Taat Setiawan Tanuwijaya, Zamzam A.J. Teuku Yan Waliana Muda Iskandarsyah Teuku Yan Waliyana Teuku Yan Waliyana Muda Iskandarsyah Teuku Yan Waliyana Muda Iskandarsyah Teuku Yan Waliyana Muda Iskandarsyah Trisnadiansyah, Mochamad Ridfan Umboro, Sindhu Undang Mardiana Valérie Plagnes Vijaya Isnaniawardhani W. Kuntjoro, W. Wahyu Purwoko Wanda Adinugraha Wilda Naily Yoga A. Sendjaja Yudhi Listiawan Yuyun Yuniardi Zakarias Dedu Ghele Raja Zamzam A. J. Tanuwijaya, Zamzam A. J. Zufialdi Zakaria Zulkifli Harahap