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Jambura Geoscience Review
Published by Universitas Negeri Gorontalo
ISSN : 26230682     EISSN : 26560380     DOI : https://doi.org/10.34312/jgeosrev
Core Subject : Science,
Earth & Planetary Sciences
Jambura Geoscience Review (JGEOSREV, P-ISSN: 2623-0682, E-ISSN: 2656-0380) is an open-access journal, which publishes original papers about all aspects of the Earth and Geosciences. This comprises the solid earth, the atmosphere, the hydrosphere, and the biosphere. In addition, it provides a particular place, and an advanced forum, for contributions on natural hazards, geoscience-related environmental problems.
Arjuna Subject : Ilmu Bumi dan Planet (semua kategori) - Ilmu Bumi dan Planet (Lain-Lain)
Articles 115 Documents
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pH, Dissolved Oxygen, and Salinity Dynamics in Indonesian Coastal Waters: A Systematic Literature Review Medar M Nur; Rosmini Maru; Hasmiani Hasmiani; Selvia Selvi; Aidil Sulfitra; Nasrul Nasrul
Jambura Geoscience Review Vol 8, No 2 (2026): Jambura Geoscience Review (JGEOSREV)
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/jgeosrev.v8i2.37362

Abstract

Tropical coastal environments across archipelagic regions face intensifying pressures from global climate anomalies and localized anthropogenic drivers, making systematic water quality monitoring critical for ecosystem sustainability. This systematic literature review (SLR) evaluates the spatiotemporal dynamics of pH, dissolved oxygen (DO), and salinity as fundamental physicochemical indicators of water quality within Indonesian coastal zones and connected oceanic frameworks. Utilizing the PRISMA 2020 framework guidelines, peer-reviewed international and regional articles published between 2018 and 2025 with active Digital Object Identifiers (DOIs) were systematically evaluated and synthesized. The synthesized findings indicate that declining coastal pH and DO concentrations are consistently driven by localized organic matter loading, microbial respiration, and progressive ocean acidification trajectories. Meanwhile, salinity fluctuations are predominantly governed by monsoonal precipitation shifts, equatorial winds, and freshwater riverine discharge. This review exposes a critical research gap regarding the historical scarcity of integrated, multi-parameter monitoring paradigms. Consequently, this study underscores the urgent necessity of transitioning toward centralized, real-time automated sensing networks and advanced predictive modeling frameworks, such as Artificial Neural Networks (ANN), to support evidence-based, adaptive coastal resource management policies across dynamic Indonesian coastal zones.
Coal Rank Variation Induced by Igneous Intrusion in Pit A, Tanjung Enim, South Sumatra Dimas Kurnia Pratama; Dwi Vina Febrim; Harnani Harnani
Jambura Geoscience Review Vol 8, No 2 (2026): Jambura Geoscience Review (JGEOSREV)
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/jgeosrev.v8i2.38685

Abstract

This study investigates the effect of igneous intrusion on coal quality variation in Pit A, PT Bukit Asam Tbk., Tanjung Enim, South Sumatra, with emphasis on calorific value (CV) as an indicator of coal rank alteration. The research utilized geological and coal quality data from nine exploration drillholes (DKP_01–DKP_09) intersecting four major coal seams (A1, A2, B, and C). The dataset included drilling records, geophysical logs (gamma ray and density), core descriptions, geological structure measurements, and proximate analysis results from coal samples located 70.9–1001.4 m from the interpreted intrusion body. Seam correlation and three-dimensional subsurface modeling were performed using Leapfrog software to evaluate spatial coal quality variation relative to intrusion proximity. The results indicate that coal located closer to the intrusion generally exhibits higher calorific values and fixed carbon content, accompanied by lower inherent moisture and volatile matter values, reflecting localized thermal alteration. Coal calorific values range from approximately 11,064 to 14,311 Btu/lb (GCV_MMMF) and show a general decrease with increasing distance from the intrusion. Spatial distribution mapping reveals a clear zonation pattern, with higher calorific values concentrated near the intrusion contact and lower values occurring farther from the heat source. Several anomalous values were identified and are interpreted to reflect local overheating effects and geological heterogeneity. Structural interpretation suggests that faults may have facilitated magma emplacement, although their direct influence on coal quality variation remains uncertain. Overall, the results indicate a strong spatial relationship between igneous intrusion proximity and localized coal rank enhancement within the study area.
Water Quality Status of the Pangkajene River: A STORET-Based Assessment Nasrul Nasrul; Erman Syarif; Abdul Malik; Ramli Umar; Hasriyanti Hasriyanti
Jambura Geoscience Review Vol 8, No 2 (2026): Jambura Geoscience Review (JGEOSREV)
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/jgeosrev.v8i2.38368

Abstract

This study assessed the water quality status of the Pangkajene River using the STORET method based on physical, chemical, and biological parameters. The research employed a quantitative descriptive-evaluative approach using 11 water quality parameters measured at 12 sampling points representing the upstream, middle, and downstream sections of the river. The observed parameters were compared with Class II water quality standards established under Government Regulation No. 22 of 2021. Water quality status was determined using the STORET scoring system to identify pollution levels and dominant parameters contributing to water quality degradation. The results showed that the Pangkajene River was classified as lightly to moderately polluted, with STORET scores ranging from −8 to −20. No sampling points were categorized as having good water quality or heavy pollution. Chemical Oxygen Demand (COD) was the main parameter exceeding the quality standard across all sampling points, followed by Total Suspended Solids (TSS), turbidity, Biological Oxygen Demand (BOD), and Escherichia coli. In contrast, pH, Dissolved Oxygen (DO), nitrate, phosphate, and Total Dissolved Solids (TDS) generally remained within acceptable limits. Higher pollution levels were observed in the middle and downstream sections of the river, indicating the influence of human activities along the watershed. These findings highlight the need for improved watershed management and pollution control measures to support sustainable water resource management and contribute to the achievement of SDG 6 related to water quality improvement.
GIS-Based Spatial Analysis of Groundwater Infiltration Potential in the Batang Pelangai Watershed Arif Rahman Putra; Bigharta Bekti Susetyo; Yastika Sari; Dina Nanda Lestari; Ade Irwan; Alviqri Febriano; Andini Dolok Saribu; Reza Inka Febriani
Jambura Geoscience Review Vol 8, No 2 (2026): Jambura Geoscience Review (JGEOSREV)
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/jgeosrev.v8i2.37206

Abstract

The Batang Pelangai watershed plays an important hydrological role in supporting groundwater recharge and regulating surface runoff in the coastal area of West Sumatra. However, land cover changes, topographic variation, and increasing land-use pressure have reduced the capacity of the watershed to absorb water. This study aimed to assess groundwater infiltration potential using a geographic information system-based weighted overlay approach. Four biophysical parameters–soil type, rainfall, land use, and slope gradient–were integrated through scoring, weighting, reclassification, and spatial overlay analysis. The results show that groundwater infiltration potential in the study area is dominated by the somewhat critical category, covering 27,861.04 ha or 49.53% of the total watershed area. The beginning critical category covers 16,488.41 ha or 29.31%, while the very critical category covers 11,452.27 ha or 20.37%. In contrast, areas classified as good and natural normal conditions are very limited, covering only 116.25 ha or 0.21% and 326.03 ha or 0.58%, respectively. These findings indicate that most of the Batang Pelangai watershed has low groundwater infiltration capacity due to the combined influence of slope, soil characteristics, rainfall distribution, and land-use conditions. The resulting infiltration potential map provides spatial information for prioritizing watershed conservation, land rehabilitation, infiltration enhancement, and sustainable water resource management in coastal watershed areas.
Analysis of Land Use Change on Spring Conditions in Ngaliyan Sub-District, Semarang City Shakira Anwalyra; Wahyu Setyaningsih
Jambura Geoscience Review Vol 8, No 2 (2026): Jambura Geoscience Review (JGEOSREV)
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/jgeosrev.v8i2.37265

Abstract

Land-use change in peri-urban areas has become an important environmental issue due to its potential impact on local water resources, particularly springs that are still directly used by communities. This study aims to analyze land-use change and its implications for spring conditions in Ngaliyan Sub-District, Semarang City, during the period 2016 to 2024. The study employs a quantitative descriptive approach by integrating spatial analysis and field-based data. Land-use changes were identified through the interpretation of multi-temporal Google Earth imagery from 2016 and 2024, while the spatial distribution of springs was mapped to examine their relationship with surrounding land use. Primary data were collected through questionnaires distributed to 100 residents who use spring water for daily domestic purposes. The results indicate a reduction in vegetated areas accompanied by an expansion of settlement and industrial land, particularly in several village experiencing high development pressure. Areas with more intensive land-use change tend to exhibit greater vulnerability in spring water quantity and physical quality, whereas areas with relatively limited land-use change show more stable spring conditions. Springs located near residential areas are more susceptible to declines in water quantity and physical quality compared to those surrounded by vegetation and relatively well-preserved environmental conditions. These findings highlight the role of spatial land-use dynamics in influencing spring sustainability and emphasize the need for land management strategies that prioritize the protection of local water resources.
Age and Depositional Environment of Sampolakosa Formation Calcarenite Base on Foraminiferal Fossil Analysis Isman Saleh; Ali Okto; Amritzal Nur Firdaus
Jambura Geoscience Review Vol 8, No 2 (2026): Jambura Geoscience Review (JGEOSREV)
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/jgeosrev.v8i2.38544

Abstract

The Sampolakosa Formation in Buton Island, Southeast Sulawesi, Indonesia, is predominantly composed of packstone calcarenite, which is brownish white when fresh and brown when weathered, and contains 57.8% skeletal grains, 34.3% micrite, 6.1% sparry calcite, and 1.8% pores/voids. Petrographic analysis indicates a grain-supported fabric, reflecting deposition in a moderate-energy environment capable of accumulating bioclasts while retaining a micrite matrix. Planktonic foraminiferal assemblages, including Globorotalia plesiotumida, Globorotalia acostaensis, and Globorotalia mayeri, constrain the age of the formation to the Late Miocene (~11–6 Ma), consistent with its stratigraphic position overlying the Tondo Formation and underlying the Wapulaka Formation. Benthic foraminifera, such as Cibicides lobatulus, Lagena sp., Bolivina sp., and Chrysalidina gradata, indicate deposition on a shallow to middle shelf (5–100 m) within a warm, clear tropical carbonate shelf characterized by moderate bottom-water energy, active currents, and generally well-oxygenated conditions with locally reduced oxygen levels. The combination of grain-supported packstone and micrite retention suggests deposition below the fair-weather wave base but influenced by occasional high-energy events, representing a transition from nearshore to middle shelf under relatively stable seabed conditions. These findings provide a robust framework for the biostratigraphy and paleoenvironmental reconstruction of the Sampolakosa Formation, contributing to regional stratigraphic correlations and insights into carbonate depositional systems.
GIS-Based Flood Hazard Mapping Using Weighted Overlay in Bekasi City Lamya Nurul Adzkia; Hermawan Setiawan; Andri Noor Ardiansyah
Jambura Geoscience Review Vol 8, No 2 (2026): Jambura Geoscience Review (JGEOSREV)
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/jgeosrev.v8i2.37870

Abstract

Flooding remains a recurrent urban hazard in Bekasi City owing to the interaction of lowland topography, downstream hydrological position, rapid urban development, and reduced surface infiltration. This study aims to map flood hazard levels in Bekasi City using a geographically weighted overlay (GIS)-based method and to examine the spatial agreement between the modeled hazard zones and observed flood occurrences. Seven parameters were integrated into the analysis: land use/land cover, rainfall, slope, soil type, Topographic Wetness Index, distance to rivers, and distance to roads. Each parameter was standardized, scored, and weighted based on relevant literature before being combined to produce a composite flood hazard index. The resulting map classified the study area into very low, low, moderate, high, and very high hazard classes. The results show that more than 80% of Bekasi City is located within moderate to very high flood hazard classes, with higher hazard zones concentrated mainly in the central and eastern parts of the city. These areas are characterized by flat terrain, high wetness potential, proximity to river networks, and a dominant built-up land cover. A preliminary spatial validation using 12 observed flood occurrence points indicates that approximately 83% of the points are located within moderate to very high hazard zones. These findings suggest that the GIS-based weighted overlay method can support preliminary flood hazard identification in data-limited urban areas. However, the results remain sensitive to parameter selection, weighting schemes, and limited validation data.
Spatial Analysis of Flash Flood Susceptibility in Ulu Ogan District Salma Aulia Az-zahra; Budhi Setiawan; Yogie Zulkurnia Rochmana
Jambura Geoscience Review Vol 8, No 2 (2026): Jambura Geoscience Review (JGEOSREV)
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/jgeosrev.v8i2.37786

Abstract

Ulu Ogan District, Ogan Komering Ulu Regency, is an area with a history of flash flood events triggered by high rainfall intensity and steep topographic conditions. This study aims to analyze flash flood susceptibility using the Analytical Hierarchy Process (AHP) to determine parameter weights and a Geographic Information System (GIS)-based Weighted Overlay technique to produce a susceptibility zoning map. The parameters used include rainfall, slope, river distance, soil type, land use, and elevation. Rainfall data were obtained from CHIRPS, while the Digital Elevation Model (DEM) was derived from DEMNAS with a spatial resolution of 30 m. Land use data were obtained from the Ina-Geoportal (RBI dataset) provided by the Indonesian Geospatial Information Agency (BIG). All spatial datasets were processed in ArcGIS and resampled to a uniform spatial resolution to ensure consistency in the overlay analysis. The results indicate that areas classified as high susceptibility cover 1.35 km² (0.52%) and are concentrated along the Ogan River, particularly in low-lying areas located very close to the river channel. Moderate susceptibility areas cover 54.38 km² (21.10%) and generally follow the pattern of valleys and river networks. Meanwhile, low susceptibility areas dominate the study area, covering 201.99 km² (78.37%), and are mostly located in higher topographic regions farther from the main river channel. Despite the dominance of low susceptibility areas, river valley zones remain vulnerable to flash floods due to the localized and rapid nature of flash flood events.
Spatial Analysis of Population Pressure and Agricultural Land Carrying Capacity in Slawi District, Tegal Regency Fandi Maulana Akhmad; M. Fikri Amrullah
Jambura Geoscience Review Vol 8, No 2 (2026): Jambura Geoscience Review (JGEOSREV)
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/jgeosrev.v8i2.37179

Abstract

Population growth and rising demand for housing have accelerated agricultural land conversion in the Slawi District, Tegal Regency, raising concerns about the capacity of available land to support the local population. This study aimed to analyze the spatial patterns of population pressure and the carrying capacity of agricultural land at the village level in the Slawi District. A quantitative approach was employed using the Soemarwoto (1985) Model II framework to calculate the population pressure index (TP) and agricultural land carrying capacity (DDLP). Secondary data were obtained from the Agriculture, Fisheries, and Forestry Extension Center, the Food Security and Agriculture Service, and the Central Bureau of Statistics. The data were quantitatively processed and spatially mapped using GIS to identify variations among villages. The results show that the Slawi District experiences high population pressure, indicated by a TP value of 1.21 people/ha, while its agricultural land carrying capacity is classified as low, with a DDLP value of 0.83. At the village level, areas with higher population pressure generally show lower agricultural land carrying capacity, indicating an inverse relationship between the two indicators. These findings demonstrate that the distribution of land resource capacity in the Slawi District is spatially uneven, and that several villages are under greater pressure than others. The study concludes that strengthening land-use control and protecting sustainable agricultural land are important to reduce the risk of continued land conversion and declining land support capacity.
Coastal Vulnerability Assessment Using CVI in Kedung and Tahunan Raihan Rahmat Darmawan; Tjaturahono Budi Sanjoto
Jambura Geoscience Review Vol 8, No 2 (2026): Jambura Geoscience Review (JGEOSREV)
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/jgeosrev.v8i2.37176

Abstract

Coastal areas are increasingly exposed to environmental pressures, such as erosion, shoreline change, and sea-level rise, which threaten the sustainability of coastal systems and human activities. This study aimed to assess coastal vulnerability in the Kedung and Tahunan subdistricts using the coastal vulnerability index (CVI). The analysis integrated physical and socioeconomic parameters, including shoreline change, geomorphology, wave conditions, sea-level rise, tidal range, coastal slope, land use, population density, sex ratio, age structure, and poverty rate. Data were obtained from field surveys, secondary sources, and Landsat 8 imagery and processed using geographic information systems (GIS) and the digital shoreline analysis system (DSAS). The results showed clear spatial variations in vulnerability at the village level. Panggung exhibited the highest CVI value (25.5), indicating high vulnerability, whereas Kedungmalang (6.81), Bulakbaru (5.11), Semat (6.14), and Telukawur (6.14) fell into the moderate category. Kalianyar (4.09), Surodadi (3.06), Tanggultlare (0.68), and Tegalsambi (3.07) showed lower vulnerability levels. These differences were influenced by the interaction between physical coastal conditions and socioeconomic characteristics, particularly population density, demographic structure, and poverty levels. The findings demonstrate that the CVI approach provides a comprehensive representation of coastal vulnerability and offers a useful basis for spatially informed coastal management and risk reduction strategies.

Page 11 of 12 | Total Record : 115

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