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Journal of Geoscience, Engineering, Environment, and Technology
Published by Universitas Islam Riau
ISSN : 2503216X     EISSN : 25415794     DOI : 10.25299
Core Subject : Science, Social, Engineering,
Earth & Planetary Sciences Engineering Environmental Science Physics
JGEET (Journal of Geoscience, Engineering, Environment and Technology) published the original research papers or reviews about the earth and planetary science, engineering, environment, and development of Technology related to geoscience. The objective of this journal is to disseminate the results of research and scientific studies which contribute to the understanding, development theories, and concepts of science and its application to the earth science or geoscience field. Terms of publishing the manuscript were never published or not being filed in other journals, manuscripts originating from local and International. JGEET (Journal of Geoscience, Engineering, Environment and Technology) managed by the Department of Geological Engineering, Faculty of Engineering, Universitas Islam Riau.
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Articles 551 Documents
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Locating Geodiversity Hotspots through Grid-Based Spatial Indexing: Lombok Island, Indonesia Gathot Harbowo, Danni; Siringoringo, Luhut Pardamean
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.2025.10.02.18898

Abstract

Locating geodiversity hotspots across large areas poses a challenge for further geopark development in Indonesia, especially on Lombok Island, which spans 5,435 km². A geodiversity hotspot is an area rich in unique geological features that need to be determined. Therefore, this study's objective is to track and assess the potential of geodiversity on Lombok Island. The methods employed a grid-based spatial indexing method to pinpoint potential geodiversity hotspots in Lombok. The entire island was covered using 238 grids of 5×5 km² for this study. The technique applied these equal weight parameters: relative drainage density (20%), diversity of topographical slope (20%), elevation (20%), diversity of geological formation (20%), and soil characteristics (20%). The identified geodiversity hotspots were validated through ground checking. The results show significant geodiversity hotspots: Gangga (116°12'13.122"E;8°21'24.154"S), Sikur (116°24'32.015"E;8°29'23.597"S), Bayan (116°32'33.211"E;8°16'22.39"S), Sembalun (116°29'18.063"E;8°23'22.156"S), Sambelia (116°35'40.856"E;8°24'1.371"S), and Gerung-Kuripan (116°8'20.085"E;8°41'46.513"S). These hotspots showcase a range of lithologies from the Oligo-Miocene to the Plio-Pleistocene, along with terrestrial and marine fossils, minerals, geothermal activities associated with the Rinjani Volcano, and diverse soil types that support rich biodiversity. The dense drainage systems in these regions create stunning waterfalls and distinct elevational ecosystems. Tourism is primarily concentrated in well-known sites like Sembalun and Gerung-Kuripan, while lesser-known areas such as Sambelia, Gangga, Sikur, and Bayan remain underexplored. The natural drainage systems in these hotspots play a crucial role in hydrology and contribute to the beautiful landscapes. This study concludes that Lombok Island has six significant geodiversity hotspots, which hold geological importance for supporting the geoheritage of the Rinjani-Lombok UNESCO Global Geopark. The findings contribute to promoting local development by integrating cultural aspects and ensuring sustainability in line with global sustainable development goals. Additionally, the study provides new insights into the geotourism potential that can support sustainable development within the Rinjani-Lombok UNESCO Global Geopark.
Environmental Management of Liboganik Organic Fertilizer Plant from Solid Palm Oil Waste in Pauh Village, Bonai Darussalam District, Rokan Hulu Regency, Indonesia Hartanto, Farhan Sidiq; Putra, Ridwan Manda; Nurhidayah, Tengku; Amin, Bintal; Budijono, Budijono; Yusmarini
Journal of Geoscience, Engineering, Environment, and Technology Vol. 10 No. 3 (2025): JGEET Vol 10 No 03 : September (2025)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2025.10.3.19011

Abstract

This study was designed to analyze and examined the environmental management strategy of Liboganik solid organic fertilizer factory derived from solid palm oil waste in Pauh Village, Bonai Darussalam District, Rokan Hulu Regency, Riau. The study used a qualitative approach method using questionnaire and interview instruments as well as laboratory tests conducted with samples of company leader, factory employees, communities around the fertilizer factory and palm oil farmers totaling 63 and selected randomly. The results of the study showed that the water quality of the Liboganik organic fertilizer factory waste was polluted, as seen from the data from the physical parameter laboratory tests above, it can be seen that the suspended solids (TSS) content and COD content exceed the standard COD waste standards for organic fertilizer factories according to the standard of the Minister of Environment Regulation No. 5 of 2014 concerning Wastewater Quality Standards. Environmental management can be carried out through the spatial planning of fertilizer factory buildings as well as through the construction of adequate infrastructure and paying attention to its impact on the environment and factory workers in order to encourage the realization of an environmentally friendly fertilizer factory. It is concluded that environmental management of organic fertilizer factories can be done by making a ditch pond to accommodate seepage of residual palm oil factory waste and limiting it so that pollution does not occur to the community environment. In addition, in an effort to reduce high COD and BOD content, wastewater management can be carried out using Phytoremediation techniques and also technology using Vertical Water Circulation (SAV). The results of IFAS and EFAS as well as SWOT analysis concluded that the environmental management strategy of the Liboganik organic fertilizer factory is in the SO quadrant and is included in Aggressive Strategy.
Application of Spatial Methods in Predicting Electricity Demand Based on Small Islands in Sebatik Island Divided by Two Countries Wijaya, I Gede Putu Oka Indra; Marsuki, Aminah Indahsari
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.2025.10.1.19060

Abstract

Indonesia, as the largest archipelagic country in the world, also has several outer islands. Sebatik Island is one of the 92 outer small islands of Indonesia, located in a strategic position as it borders Malaysia. Various needs of society, one of which is electricity, are very important for people's lives and economic development. Thus, the goal is for all households in Indonesia to have access to electricity by 2024, with both the electrification rate and the ratio of electrified villages reaching 100%. An electricity plan is also necessary to help ensure that electricity is distributed fairly and equitably throughout Indonesia. Load prediction is an essential aspect of the load side of the electric power system that requires careful planning. Machine learning methods are not suitable for application in load prediction analysis in remote areas of small islands, which have limited space. Therefore, this research presents an alternative approach, specifically the spatial method utilizing (RTRW) documents. The application of this spatial method is intended to offer an overview of electricity load predictions that are more aligned with the actual situation. This spatial method analyzes the area size with land use development patterns according to local policies, multiplied by the standard definition of an activity in each spatial unit. Thus, an estimate of the peak load for each year is obtained, even up to ultimate conditions. The load prediction model follows the Gompertz equation, where the ultimate condition obtained is 63.55 MW, which may occur 118 years from the starting point in 2022. Choosing a 90% confidence level in the Monte Carlo simulation provides a reasonable range of predicted values. Based on this new knowledge, a country's electric utility will be able to build infrastructure and generate electricity in a more efficient manner.
Continental Sediments of Cinambo Formation in the Bogor Trough West Java, Indonesia Abdurrokhim; Iyan Haryanto
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.2025.10.1.19069

Abstract

Volcanoclastic sediments commonly represent low quality reservoir facies, since volcaniclastics are composed largely of reactive and unstable minerals that leads to the destruction of porosity by cementation and compaction processes. During the Neogene time, although the Bogor Trough largely infilled by volcaniclastic deep-water deposits, the arenites that delivered from continental in the north actually still contributed as sequel Paleogene deposits. This manuscript intends to discusses the Neogene provenance of continental sediments  into the Bogor Trough. The samples are taken from sandstone beds of the Cinambo Formation at Cilutung River in Majalengka. Quartz-rich sandstones are better potential reservoirs in term of quality in hydrocarbon exploration of sub-volcanic region in this area.
Application of Carbon Nanotube (CNT) to Improve Mechanical Properties of Concrete: A Comparative Analysis with Superplasticizer Sunarno, Yohans; Abduh, Natsir; Eka Yuniarto; Tumpu, Miswar; Nelfia, Lisa Oksri
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.2025.10.1.19526

Abstract

Many researchers' interest in carbon nanotube (CNT) materials has grown as a result of their potential use in the construction industry. This is mostly related to the mechanical, electrical, thermal, kinetic, and chemical properties of CNT, which have a big impact on the way concrete functions. Hydrated calcium silicate is a complex network of binding particles that compose the cement composite material known as concrete. Since it has nanoscale features, CNT will interact most strongly with hydrated calcium silicate, improving the concrete's mechanical qualities. The purpose of this study is to ascertain the impact of adding CNT to concrete mixtures. Three distinct mixes were created by varying the types and amounts of admixtures that were added to the concrete mix.  Two mixed variations employed CNT at various doses, while one mixed variation used admixture type F (superplasticizer), and the performance of one was compared to the other. Concrete that was both new and hard underwent specimen testing. On fresh concrete, a slump test was conducted using ASTM C163, while for hard concrete, cylindrical specimens measuring 100 mm x 200 mm were tested for unit weight and compressive strength at 7, 14, and 28 days following ASTM C39. According to the test results, utilizing CNT at a lower dose than the typical superplasticizer dose leads to greater workability and compressive strength. The results of the workability and compressive strength tests will be improved by the inclusion of CNT.
Analysis Of Aquifer Characteristics Using The Method Cooper Jacob At Block X Pt. Geomine Bara Studio Site Kutai Kartanegara, East Kalimantan, Indonesia Sari, Avellyn Shinthya; Wardana, Novandri Kusuma; Cahyono, Yudho Dwi Galih; Sarastika, Ristya Mahda
Journal of Geoscience, Engineering, Environment, and Technology Vol. 10 No. 3 (2025): JGEET Vol 10 No 03 : September (2025)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2025.10.3.19690

Abstract

Using the Cooper-Jacob method, this research analyzes the characteristics of the aquifer in Block X of Geomine Bara Studio Site Ltd., Kutai Kartanegara. This method can determine the main hydrogeological parameters, such as the aquifer's hydraulic conductivity/permeability coefficient, transmissivity, and storage coefficient (storativity) of the aquifer. Data from the pumping test served to understand the aquifer's response to pumping. The research results showed that the aquifer in Block X had a transmissivity of 193,9949 m²/day, hydraulic conductivity of 6,0634335 m/day, and a storage coefficient (storativity) of 0,000137. The soil type at the test location was fine sandy with a low porosity value of n = 0,499%, and the soil permeability was low at k = 0,056403975 mm/ sec. Groundwater in the study area had quite potential for meeting the needs of Geomine Bara Studio Site Ltd in Kutai, Kartanegara, with a groundwater availability of H219,398 m³ and a withdrawal rate of Q 182,0678 m³/day. This study indicated high water flow capacity with low storage ability, suggesting a confined aquifer. It benefits sustainable groundwater management and mitigates environmental impacts in the study area.
Active Tectonics of the Garsela Fault Utilizing Morphotectonics and Seismicity in Garut Regency, Indonesia Pristiwantoro, Rafa Nurul Zahra; Fahrudin; Widiarso, Dian Agus; Moechtar, Rio Alcanadre Tanjung; Cita, Akbar
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.2025.10.02.20209

Abstract

Tectonic activity along active faults in Indonesia has a high potential to cause earthquakes with magnitudes greater than 6.5. This research focuses on the Garsela Fault in Garut Regency, West Java, which has a history of shallow earthquakes occuring near nationally important infrastructure. Morphotectonic analysis, Maximum Credible Earthquake (MCE) calculations, geological structure measurements, and subsurface condition assessments were conducted to determine the tectonic activity around the Garsela Fault and its fault mechanism. The analysis results show that tectonic activity in Garut Regency ranges from low to high. The Garsela Fault is divided into two segments with different fault systems: the Rakutai Segment, a normal fault (16.22 km), and the Kencana Segment, a strike-slip fault (17.33 km). MCE calculations for the Garsela Fault indicate potential maximum magnitudes of 5.42, 5.54, 6.28, and 6.54. Shallow earthquakes may produce stronger tremors in the western part of the Rakutai Segment compared to the east. In addition, earthquakes originating from the Kencana Segment may also generate tremors in the southern part of Garut Regency.
Study of the Mechanical Properties of Underwater Concrete in Seawater Environments Kurniawandy, Alex; Ismeddiyanto; Haekal, Muhammad; Zikri, Raudatul
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.2025.10.1.20989

Abstract

Anti-washout concrete (AWC) is a specialized cement-based material designed to be applied directly in underwater environments, maintain mix integrity, and prevent material washout. AWC can. This research aims to evaluate the performance of anti-washout concrete in seawater environments containing chemical compounds aggressive to concrete, by examining the ability of concrete to withstand loads, resistance to washout, and structural stability when exposed to seawater environments. The test methods used included aggregate characteristics, slump flow, compressive strength, split tensile strength, and flexural strength at 7, 14, 28, and 56 days of concrete age. The results showed that concrete with fresh water (AB) had higher compressive, split tensile, and flexural strengths than concrete using artificial seawater (AL), with a decrease in compressive strength in AL against AB of 7.29% at 14 days, 11.20% at 28 days, and 12.69% at 56 days. AWC met the minimum compressive strength requirement of 70% of the Japan Society of Civil Engineers (JSCE) standard, indicating that AWC with artificial seawater remains viable for underwater construction applications. This study's results are expected to guide the use of anti-washout concrete for various underwater applications, particularly to improve durability and reduce long-term maintenance costs for underwater infrastructure.
Estimation Top and Bottom of Bogor Fault, Kepahiang Regency Based on 2D Magnetotelluric Data Analysis Muammar, Zaky; Muchammad Farid; Arif Ismul Hadi; Tedy Algozali; Andre Rahmat Al Ansory; Hana Raihana
Journal of Geoscience, Engineering, Environment, and Technology Vol. 10 No. 3 (2025): JGEET Vol 10 No 03 : September (2025)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2025.10.3.21168

Abstract

Kepahiang Regency, Bengkulu Province, is an area crossed by the Musi segment of the Sumatra Fault and a number of secondary faults, including the Bogor Fault, which contribute to the high level of seismic activity in the region. The presence of these active faults, combined with a relatively high population density, poses a potential threat to infrastructure and public safety. This study aims to identify the subsurface geometric characteristics of the Bogor Fault, particularly its upper and lower depths, as part of earthquake disaster mitigation efforts. The Magnetotelluric (MT) method was used in this survey with the ADU-07e system, which utilizes natural electromagnetic fields, with two horizontal electrical sensors (Ex, Ey) and three horizontal sensors (Hx, Hy), as well as a vertical magnetic sensor (Hz). Data collection was conducted at six measurement points with a 1 km interval along the Northeast–Southwest transect that crosses the Musi Fault and the Bogor Fault. Data processing was performed using MAPROS software for time-domain to frequency-domain conversion, and ZONDMT2D for subsurface modeling. The modeling results showed a low resistivity zone at point T6, with values between 0.21–1.6 Ωm, which was interpreted as the presence of the Bogor Fault. This zone was identified at a depth of approximately 2 km and was estimated to extend more than 8 km in the north–south direction. This finding provides important indications of the presence of an active fault in the area and can serve as a basis for earthquake risk mitigation efforts in Kepahiang.
Geotechnical Analysis in the Case of Recovery Failure of West Out Pit Dump PT. Mifa Bersaudara Rezky, Danu; Khomeini, Andi Ronald; Balyani, Kiagus Farobi
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.2025.10.02.21232

Abstract

The formation of waste dump with heterogeneity of constituent materials and muddy Base conditions as the foundation of the waste dump is a challenge for practitioners and academics so that stable embankments as a place to dispose of overburden material can be formed. Case studies that occurred at PT. Mifa Bersaudara, namely the Failure of West Out Pit Dump (OPD) Elevation +30 to elevation +15 which caused the Water Monitoring Point (WMP 24) to be damaged and potentially damage the IUP boundary road. This incident occurred through Prism monitoring and the loss of the progressive movement category which caused the disposal of elevation +30 to be sterilized from dumping operations before recovery disposal was carried out. The Back Analysis Approach, Laboratory Testing, and tracing of dumping history were carried out to obtain accurate material model and property analysis. Geotechnical recommendations start from the reconstruction of the Water Monitoring Point by re-filling the failure area at elevation +20 and the compartment embankment at elevation +23. After that, it was continued with the reconstruction of the disposal leg (counterweight) elevation +25, as well as adjusting the geometry of the disposal elevations +30, +40, and +50 so that the failure area could be re-filled. The final results obtained from this case study are that the IUP boundary road and Water Monitoring Point were successfully constructed, Optimization of disposal in the failure area can be done by adding a volume of 1.3 million bcm, and the recovery area for the failure of disposal can be used as a reclamation area with an area of ​​4 Ha. The update of the Safety Factor value after the work stated that the disposal was in a Safe condition. Description of Recommendations, Staging Plan, and future research development will be explained further in this Paper.

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