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All Journal Bulletin of Scientific Contribution : Geology IJOG : Indonesian Journal on Geoscience Jurnal Berkala Ilmu Perpustakaan dan Informasi Jurnal RISET Geologi dan Pertambangan Dharmakarya : Jurnal Aplikasi Ipteks Untuk Masyarakat Jurnal Geosaintek 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) Spektra: Jurnal Fisika dan Aplikasinya Buletin Sumber Daya Geologi Jurnal Geosains dan Teknologi Kumawula: Jurnal Pengabdian Kepada Masyarakat Prosiding Temu Profesi Tahunan PERHAPI Dinamika Lingkungan Indonesia Jurnal Geominerba Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources) Journal of Geosciences and Applied Geology BACA: Jurnal Dokumentasi dan Informasi Jurnal Geosaintek

Zufialdi Zakaria

Fakultas Teknik Geologi, Universitas Padjadjaran

Author-ID : 525619

Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts 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 Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Library & Information Science Materials Science & Nanotechnology Physics Public Health Social Sciences Other

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ANALISIS GEOMEKANIKA FORMASI HALANG DI DAERAH STRUKTUR GEOLOGI SEKITAR SUNGAI CITAAL, KUNINGAN, JAWA BARAT -, Zufialdi Zakaria
Bulletin of Scientific Contribution Vol 4, No 1 (2006): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Lithology at research area consist of sandstone, claystone and brecia which include to Halang Formation. Structure of geology is sinistral strike-slip fault with relative strike to southwest - northeast. Geomechanic analysis given a number of Rock Mass Rating and Slope Mass rating as follows: Rock mass rating is 55 to 66. RMR to foundation is 48 to 50. Description of class number is 3 (III), its mean fair rock.Slope mass rating given number of slope angle which is suggested to stable slope, as follows: According to Laubscher (1975) SMR is 55o. According to Hall (1985) SMR is 56.20o to 63.35o. According to Orr (1992) SMR is 64.49o to 71.71o . Environmental management is preventive effort of impact which attend with foundation design according to allowable bearing capacity and / or choice the architecture of building to safety. Monitoring can be conducted to condition of building (house, bridge, drainage etc.)

BIO-ENGINEERING, MELALUI PEMANFAATAN TANAMAN KALIANDRA (CALIANDRA CALOTHYRSUS) DI WILAYAH ZONA RAWAN LONGSOR JAWA BARAT -, Zufialdi Zakaria; -, Dicky Muslim; -, Raden Irvan Sophian; -, Sondi Kuswaryan; -, Ujang Hidayat Tanuwiria
Bulletin of Scientific Contribution Vol 11, No 3 (2013): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Landslides prone areas can be occur due to a large slope, open slopes, large erosion rate, or a large infiltration. Landslide prone areas can be prevented by a stable slope engineering. Engineering of stable slopes can be integrated through a variety of methods with preliminary procedure : 1) Mapping of landslides prone areas, 2) Slope stability analysis through the study of Safety Factor, 3) Engineering of slope stabilization and integrated through the simulation stable slope, slope design and other engineering, 4) Environmental management and environmental monitoring, 5) Bio-engineering by utilizing plants as part of a stable slope engineering systems, namely as a preventive agent of erosion, reduction of infiltration and runoff flow, landslide prevention as well as strengthening the slopes . Engineering can use the model of Starlet (Stabilisati dan Rancangbangun Lereng Terpadu, or Engineering of Slope Stabilization and Integrated) involving the role of government officials, industrial and businessmen , residents / communities , and scientists . Kaliandra chosen to be a plant that is part of a stable slope engineering . Kaliandra plants have a good root, the tree canopy is not heavy, high-protein leaves for fodder, stems and twigs are dried for energy (fuelwood ) . These plants, in addition to prevention of landslides, will be useful for people and industry.

DAYADUKUNG TANAH UNTUK BERBAGAI TIPE FONDASI TAPAK PADA LEMPUNG PLASTISITAS TINGGI DI BEBERAPA LOKASI, KABUPATEN MAJALENGKA, JAWA BARAT -, Zufialdi Zakaria; -, Agung Mulyo; -, Luthfan H. Jihadi; -, M. Bey Anural
Bulletin of Scientific Contribution Vol 11, No 2 (2013): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

The research location at Majalengka and its surrounding, West Java. The study was conducted in an effort to know soil bearing capacity for various types of foundations which depend on the physical and material properties of the soil. Location of samples obtained from three locations: Kertajati, Cikijing and Cigintung. Samples obtained in the form of high plasticity clay (CH) with the activity rate (A) between 1.01 to 1.42 (with Skempton method) or 1.12 to 1.61 (the Seed method), samples are high activity clays, included of monmorilonitic mineral. Alloweble soil bearing capacity (qa) for a square foundation type, between 11.04 to 19.50 T/M2; for a circular (rounded) foundation types, from 11.00 until 19.07 T/M2; and for the type of continuous foundation, between 8 , 85 to 15.28 T/M2. To avoid of the failure of the foundation, the building load should not exceed the value of allowable soil bearing capacity. The estimated expansive soils, soil improvement is required to be done.

KAJIAN GEOTEKNIK TERHADAP FORMASI TANJUNG DI PIT SAYUNA, SATUI, KALIMANTAN SELATAN, DENGAN MENGGUNAKAN METODE SLOPE MASS RATING -, Geni Dipatunggoro; -, Zufialdi Zakaria
Bulletin of Scientific Contribution Vol 10, No 2 (2012): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Lithology of Tanjung Formation from the oldest to the youngest layers consists of siltstone, mudstone, dan carbonaceous mudstone or sandstone layers with four coal seams. Strike of joint varied N28ºE to N48ºE, N188ºE to N245ºE and N284ºE to N354ºE, and dip of joint varied 52º to 88º (very steep). Weathering conditions of rocks at the surface are moderately weathered (WM) to slightly weathered (WS) stage, and some of this surficial soils are at highly weathered (WH) stage as top soisl. In the bor holes these kinds of weathering stages (WM and WS) are characterized by both law core recovery dan RQD. Sedimentary rock of layer the joint to formed rock blok is discontinuity plane (bedding plane dan joint). The classification system is according to Rock Mass Rating (RMR) after Bieniawski, 1973 to determine the Slope Mass Rating (SMR) resulting maximum angle of cut slope of the rock mass in a stable condition. Rock Mass Rating (RMR) of penetrated rocks of the Tanjung Formation in Bore Hole No. AW-1, AW-2, and AW-3 range from 35 to 70, 40 to 50, and 29 to 60 respectively. The class numbers of the rock mass are II and III in general, suggesting that yhe rock masses are stable (class II) to partially stable (class III), but in Bore Hole AW-1 and AW-2 at the depth ranging from 39.45 to 45.30 meters and 04.75 to 27.84 meters (3 rock masses) respectively class IV occur characterizing the instable rock masses.

GEOLOGI TEKNIK JATINANGOR: STUDI DAYADUKUNG TANAH BERDASARKAN PREDIKSI KADAR AIRTANAH UNTUK MENUNJANG ECO-CAMPUSS DI JATINANGOR Sophian, Irvan; Zakaria, Zufialdi; Prianda, Yogi; Utomo, Rizky Narendra
Bulletin of Scientific Contribution Vol 12, No 1 (2014): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/bsc.v12i1.8360

Research location at Rector Building area, Unpad Campus, Jatinangor. The study is a part of research of Jatinangor engineering geology. Strength prediction of soil bearing capacity for shallow foundation is performed by measuring the water content of the soil at four locations sampled. Based on the formula of Hirnawan & Zakaria (1991), a variable value of unit weight (γ) = 1.73 T/M3; cohesion (c ) = 7.80 T/M2; and angle of friction= 13.69 degrees. The soil variables based on the value of water content by 43.85%. The result of soil bearing capacity (in dry conditions) around the ground surface of the rector building area is as follows: Type of foundations Square = 17,732 T/M2; Circular foundation type = 17,708 T/M2; Continuous foundation type = 13.714 T/M2. In wet conditions, the value of carrying capacity must be calculated again.

IDENTIFIKASI DAN MITIGASI PADA ZONA RAWAN GEMPA BUMI DI JAWA BARAT -, Zufialdi Zakaria; -, Ismawan; -, Iyan Haryanto
Bulletin of Scientific Contribution Vol 9, No 1 (2011): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Java Island is a region of frequent earthquakes with varying strength. Most of destructive earthquakes measuring over 5.6 on the Richter Scale, as a shallow earthquake with a depth of less than 30 KM. On land, the earthquake can damage a variety of infrastructure and endanger lives. At ocean, earthquakes tend to be a potential tsunami. The tsunami that ever happens is in the south of Pangandaran beach on July 27, 2006. To reduce the impact of the earthquake disaster, the identification and mitigation is required. In the identification of the earthquake in the mainland, the earthquake potential of fault-lines are shown on a large faults, there are: Earthquake's Row of Zone Bayah, Earthquake Row of Baribis Zone, Earthquake Row of Cimandiri Zone, Earthquake Row of Lembang Zone, Earthquake Row of Citanduy Zone. On the identification of the earthquake in the ocean, is required analysis to see the condition of the epicenter in the southern Teluk Pelabuhan Ratu. Mitigation of earthquake disaster can be done, among others through the various activities that need to be socialized, assisted by experts from various disciplines.

AKTIVITAS TANAH LAPUKAN BREKSI VULKANIK DAN IMPLIKASINYA TERHADAP KEKUATAN FONDASI DI JATINANGOR -, Irvan Sophian; -, Zufialdi Zakaria; -, Yuyun Yuniardi
Bulletin of Scientific Contribution Vol 5, No 1 (2007): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Jatinangor require public facility. The facility need strength of soil bearing capacity for stable foundation in occupying each soil mass. Soil type in this area is CH ( clay of high plasticity) and MH (silt of high plasticity). Based on diagram of Cassagrande, area research reside between U-line and A-line, and soil type generally is CH, clay high plasticity.At soil which have medium-high activity, allowable soil bearing capacitry ( qa) for continuous foundation is between 31.450 until 52.884 T/m2. Soil bearing capacity ( qa) with activity number (A) show negative relationship ( R - 0.804058). Increasing soil activity caused decreasing soil baring capacity.Instruction of Environmental Monitoring Plas is done especially monitoring at condition of house building and also other medium building like drainage channel and bridge etcetera. Environmental monitoring is required as effort to anticipate damages of arising out effect of negative impact. Small damage is properly attention or improve repaired before becoming is big.

Potential Hazards of Erosion and Conservation Strategis in the Sail Sub-Watershed, Pekanbaru City, Riau Province, Indonesia Ramsof, Rani Amalia; Zakaria, Zufialdi; Irvan Sophian; Arie Afriadi
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.2025.10.1.20795

Erosion in watershed area can be triggered by changes in land use, human activities, and cause increased sedimentation, flood risk, and environmental degradation, effective conservation measures are necessary to ensure its impact is reduced. To determine potential erosion hazards in Sail Sub-Watershed the method used is Revised Universal Soil Loss Equation (RUSLE), parameters include rainfall, soil erodibility, slope length and slope, and land cover and soil conservation. In addition, an analysis of permissible erosion and an erosion hazard index were carried out. The research results show that the level of erosion hazard is influenced by the value of the rain erosivity factor (R) of 2678.98 m with the wet rainfall classification. The soil erodibility factor (K) is dominated by cambisol soil types with a K value of 0.28 and podzolic with a K value of 0.20. The length and slope (LS) factors are dominated by flat topography with an LS value of 0.4. Meanwhile, the land cover and soil conservation (CP) factors mostly consist of open land, shrubs and plantations that have not received any conservation efforts. The erosion hazard level (TBE) in ranges from moderate to very severe, indicating that the areas affected by erosion are predominantly due to the use of open land, such as at station 16. The erosion hazard index (EHI) varies from moderate to very high. As a land conservation effort, vegetative methods in the form of reforestation are recommended for open land, while terrace walls or wet masonry are recommended for agricultural land and plantations. In addition, conservation structures such as retaining walls, bench terraces, or stairs can be implemented on plantation land to reduce the danger of erosion.

IMPLIKASI KADAR AIRTANAH TERHADAP DAYADUKUNG TANAH DI WILAYAH GAMBIR DAN SEKITARNYA Yuda, Himmes Fitra; Zakaria, Zufialdi; Sukiyah, Emi
Bulletin of Scientific Contribution Vol 15, No 1 (2017): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (732.017 KB)

ABSTRACTThe research area is in Gambir and surround it, Central Jakarta and West Jakarta municipality. The study to learn the characteristics of the soil in the research area. The relationship of water content and soil bearing capacity is known from secondary data of soil investigation at four locations sampled. Based on observations of four soil samples, the highest water content is in sample HF-3 at 68.28%, and the lowest water content is in sample HF-4 by 48%. Depend on the soil bearing capacity value, sample HF-3 has the lowest value, which is 2.64 T / M2. The highest soil bearing capacity value is found in the sample HF-4, which is 25.49 T / M2. Regression correlation test results showed that in dry conditions / low water content, the value of soil bearing capacity will be high, meanwhile in wet conditions, water levels will rise, so the value of the soil bearing capacity will be smaller than in dry conditions. Keywords : Soil bearing capacity, water content ABSTRAKLokasi penelitian berada pada wilayah Gambir dan sekitarnya, kotamadya Jakarta Pusat dan Jakarta Barat. Studi ini untuk mempelajari karakteristik tanah pada daerah penelitian. Hubungan kadar air dan daya dukung tanah diketahui dari data penyelidikan tanah di 4 lokasi sampel. Berdasarkan pengamatan dari 4 sampel tanah, nilai kadar air tertinggi adalah pada sampel HF-3 sebesar 68,28%, nilai kadar air terendah adalah pada sampel HF-4 sebesar 48%. Jika dilihat dari nilai dayadukung tanah, sampel HF-3 memiliki nilai yang paling rendah, yaitu sebesar 2,64 T/M2. Nilai dayadukung tanah yang tertinggi ada pada sampel HF-4 sebesar 25,49 T/M2. Dari hasil uji regresi korelasi menunjukan bahwa pada kondisi kering/kadar air rendah, nilai dayadukung tanah akan besar, sementara pada kondisi basah, kadar air akan meningkat, sehingga nilai dayadukung tanah akan menjadi lebih kecil dibandingkan dengan kondisi kering. Kata Kunci : Dayadukung tanah, kadar air

ESTIMASI KONDISI GEOTEKNIK MELALUI METODE GEOLOGICAL STRENGTH INDEX (GSI) DI WEST EXTRACTION LEVEL TAMBANG DEEP ORE ZONE (DOZ) PT. FREEPORT INDONESIA Wicaksono, Danny; Zakaria, Zufialdi; Haryanto, Iyan; Wiguna, Purwa
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 (1476.157 KB)

Tambang bawah tanah Deep Ore Zone (DOZ) merupakan salah satu tambang seri ambrukanyang terletak di distrik Ertsberg. DOZ berada pada area dataran tinggi Jayawijaya padakedalaman 1.45 kilometer dari permukaan tanah. Tambang DOZ memiliki variasi dankompleksitan Geologi yang tinggi sehingga menjadikan kondisi Geoteknik yang heterogen.Pendekatan geoteknik yang efektif menjadi faktor penting dalam perencanaan terowonganbawah tanah. Pendekatan perhitungan empiris berupa Geology Strength Index (GSI) dipiliholeh peneliti karena lebih banyak menggunakan sifat-sifat batuan yang lebih mudah dilihatdalam contoh inti batuan pengeboran. Modifikasi kuantitatif GSI dilakukan agar parameterparameteryang digunakan dapat dengan tepat dilihat dari inti batuan pengeboran. Hasil studidata pada daerah West Extraction DOZ memperlihatkan hubungan nilai modifikasi kualitatifGSI terhadap batuan dan alterasi dari selatan ke utara, dimana di bagian selatan nilai GSIpada umumnya bagus-sangat bagus (60-100) tetapi beberapa area yang memiliki strukturgeologi stockwork dengan alterasi serisit mengakibatkan penurunan nilai GSI hingga buruksedang(20-60). Batuan skarn memiliki kondisi yang bervariasi mengakibatkan sebaran nilaiGSI dengan range yang tinggi, Nilai GSI yang buruk tersebar pada bagian kontak batuan danalterasi skarn yang didominasi oleh mineral-mineral lempung. Bagian utara daerah telitianyaitu pada batuan sedimen didapatkan nilai GSI yang buruk menyebar dengan arah barattimur,area ini sangat dipengaruhi oleh struktur patahan dan kontak batuan sedimen denganbatuan intrusi maupun ubahan skarn. Blok model sebaran GSI memberikan masukan sebagai dasar pengambilan keputusan dalam merencanakan arah terowongan, biaya pembangunanterowongan dan penanggulangan bahaya dalam pembangunan terowongan.Kata kunci: Deep Ore Zone, Alterasi skarn, Geology Strength Index, Rock QualityDesignation.

Co-Authors abdullah, Fajar Abu Abdillah Ali, Abu Abdillah Achmad Djumarma Wirakusumah Adiwijaya, Annisa Ayungingtyas Pratiwi Adjat Sudradjat Adriansyah, Yan Agung Mulyo Agus Wiramsya Oscar Alpionisa, Salsabila Nur Ambar Yoganingrum Andriani, Tati Andriani, Tati Anggoro Tri Mursito Anggoro Tri Mursito APRILIAN, YOGA Arie Afriadi Asykarulloh, Abdul Wahid Aton Patonah Bakhtiar, Taufiq Bambang Sugiarto Basuki, Jodi Prakoso Boy Yoseph Cahya Sunan Sakti Syah Alam Bustomi, Zhafran Muhammad Asyam Chaniago, Aulia Eka P S Chen, Reynara Davin Dicky Muslim Dinata, Muhammad Nasheer Ramdan Dwi Purnomo Edi Tri - Haryanto, Edi Tri - Edi Tri Haryanto Edi Tri Haryanto -, Edi Tri Haryanto Eko Tri Sumarnadi Emi Sukiyah Emy Sukiyah Ersyari, Jodistriawan Euis Tintin Yuningsih Febri Hirnawan -, Febri Hirnawan Firmansyah, M. Nizar Geni - Dipatunggoro, Geni - Geni Dipatunggoro -, Geni Dipatunggoro Gilang Perwira Adi Hendarmawan Hendarmawan Heri Nurohman Heriwaseso, Anjar Herryal Zoelkarnain Anwar Heryadi Rachmat Imam Santosa Indra Permanajati, Indra Irvan Sophian Irvan Sophian -, Irvan Sophian Irvan Sophian, Irvan Ismawan - Ismawan Ismawan, Ismawan Iyan Haryanto Jakah Jakah Jakah Jakah Jakah, Jakah Jhon Pengarapen Barus Jodistriawan Ersyari Johanes Hutabarat Jumhari Jumhari Khoirullah, Nur Kristiawan, Yohandi Lukman Muhammad Asri Luthfan H. Jihadi -, Luthfan H. Jihadi Luthfan H. Jihadi, Luthfan H. Luthfan Harisan Jihadi, Luthfan Harisan M Sapari Dwi Hadian M. Bey Anural -, M. Bey Anural MANIK, VITO ARISTO Mochamad Sapari Dwi Hadian Mubarak, Aziez Muhamad Ridwan Muhammad Bey Anural, Muhammad Bey Muhammad Kurniawan Alfadli Mursito, Anggoro Nadhirah Seraphine Nadhirah Seraphine Nana Sulaksana Nana Sulaksana Nana Sulaksana Nendi rohaendi NINGRUM, WIWIN JUNITA Noorika Retno Widuri Pajrin, Ulfia Sari Pradnya Paramarta Raditya Rendra Putra, Rafino Kurnia Putri, Revena Denia Rachmad Setijadi Raden Irvan Sophian Rahayu Robiana, Rahayu Rahmi, Nisa Shafira Muthia Ramsof, Rani Amalia Retnoningtyas, Widya Ika Reynara Davin Chen Ridwan Banda Rina Devnita Rizky Narendra Utomo, Rizky Narendra Rukmana, Yanwar Yusup Rulina Rachmawati Sabila, Zahra Syahida Seraphine, Nadhirah Seru, Imanuel Seru, Imanuel Shafira, Nisa Siahaan, Yakub Sidarto Sidarto Sihotang, Josua Washington Sondi Kuswaryan Sulastri, Murni Sumarnadi, Eko Sumaryono Sumaryono Tati Andriani Taufiq, Mochamad Muslim Tono Hartono, Tono Tupan Tupan Ujang Hidayat Tanuwiria Ulhaque, Thaha Rizal Vijaya Isnaniawardhani Wicaksana, Kintan Adelia Arum Wicaksono, Danny Wiguna, Purwa Wiyatno Haryanto Yanwar Yusup Rukmana Yanwar Yusup Rukmana Yogi Prianda, Yogi Yohanes Tan, Yohanes Yuda, Himmes Fitra Yudhicara Yudhicara Yusi Firmansyah, Yusi Yusuf, Muhammad Farhan Yuyun Yuniardi

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