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Fahmi Arif Kurnianto
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Department of Geography Education , University of Jember, FKIP Building Jl. Kalimantan 37, Jember, East Java, 68121, Indonesia.
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Geosfera Indonesia
Published by Universitas Jember
ISSN : 25989723     EISSN : 26148528     DOI : https://doi.org/10.19184/geosi
Core Subject : Science, Education, Social,
Earth & Planetary Sciences Education Environmental Science
Geosfera Indonesia is a journal publishes original research, review, and short communication (written by researchers, academicians, professional, and practitioners from all over the world) which utilizes geographic and environment approaches (human, physical landscape, nature-society and GIS) to resolve human-environment interaction problems that have a spatial dimension.
Arjuna Subject : Ilmu Sosial - Geografi, Perencanaan dan Pengembangan
Articles 220 Documents
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Projection of Cooperation Schemes to Address Conflicts Over Spatial Planning Changes in Nusa Dua's Area Management System Simorangkir, Cavin Ornando; Ramadhan, Givano; Manalu, Triana; Sukran, Muhammad Ali
Geosfera Indonesia Vol. 10 No. 1 (2025): GEOSFERA INDONESIA
Publisher : Department of Geography Education, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/geosi.v10i1.52049

Abstract

Bali has become Indonesia's leading destination in the global tourism industry, attracting a growing number of investors and privatization efforts. Nusa Dua has been designated as a site for implementing contemporary tourism concepts in Bali, prompting repurposing several areas for new commercial initiatives. The transition has resulted in conflicts among stakeholders over the decades. This study aims to examine methods for addressing conflicts that occur due to Nusa Dua’s spatial changes by identifying the key stakeholders of spatial planning with various interests. The analysis of stakeholders uses qualitative methods that include content analysis, stakeholder analysis, and literature review. DANA software version 1.3.3 is a semi-quantitative analysis used to determine the root cause of the conflicts. The result shows that conflicts over land use decisions are the most contentious in Nusa Dua’s spatial planning policies. This conflict arises due to misunderstanding and misalignment in spatial planning, leading to policy implementation challenges. This study suggests resolving conflicts and enforcing spatial policies by improving stakeholder understanding and communication. A stronger legislative framework for tourism-related development, enhancing stakeholder cooperation schemes, and encouraging sustainable growth are recommended.
Advanced Machine Learning Techniques for Tidal Marsh Classification: A Random Forest Approach using Sentinel-2A Simarmata, Nirmawana; Wikantika, Ketut; Darmawan, Soni; Harto, Agung Budi
Geosfera Indonesia Vol. 9 No. 3 (2024): GEOSFERA INDONESIA
Publisher : Department of Geography Education, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/geosi.v9i3.52186

Abstract

Tidal marshes play a vital role in coastal ecosystems, functioning in climate change mitigation, water filtration, and protection from coastal erosion. However, mapping and monitoring of these ecosystems is often hampered by difficult accessibility and dynamic environmental conditions. This research aims to improve tidal marsh classification accuracy by applying a Random Forest (RF) algorithm supported by Sentinel-2A satellite imagery. This image provides various spectral parameters and vegetation indices, including B1, GNDVI, BSI, and NDWI. Three RF models with varying parameters were tested to determine their effectiveness in tidal marsh classification. The model with 26 parameters (Model 3) performed best, with the lowest RMSE value of 0.22, the highest AUC of 0.87, and the highest overall accuracy of 95%. These results show that combining critical spectral parameters in the RF model can significantly improve the classification accuracy and biomass estimation in tidal marshes. This study also confirmed the effectiveness of Random Forest in addressing the challenges of high-accuracy mapping and monitoring. These findings provide a solid foundation for tidal marsh ecosystem conservation and management applications and support the application of machine learning in coastal ecosystem mapping for better and more accurate results.
Resilience Index and Non-Structural Mitigation in Facing Earthquakes in Bantul Regency Andikasari, Lian Yuanita; Riyandari, Ritha; Qonita, Zulfa; Utami, Dyah Nursita
Geosfera Indonesia Vol. 10 No. 1 (2025): GEOSFERA INDONESIA
Publisher : Department of Geography Education, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/geosi.v10i1.52332

Abstract

Bantul is one of the regencies in the Special Region of Yogyakarta that was affected by the damage, losses, and casualties due to the Yogyakarta earthquake disaster in 2006. The current condition with the potential for a Megathrust earthquake in the South of Java Island is a special concern in determining the resilience of an area, determining what needs to be improved in preparedness, and providing alternative non-structural mitigation that can be carried out in dealing with earthquakes. This study was conducted to determine the resilience index in social and economic aspects which were then described into six derivative variables. The method used in this study uses literature studies and sequential data analysis. Secondary data is used to calculate the resilience index with predetermined weightings. The results showed that the resilience index in 2021, 2022, and 2023 in the social aspects of 0.985, 0.981, and 0.979 and economic aspects of 1.05, 1.08, and 1.06. During these three years, the index resilience of the social aspect has decreased so mitigation was needed to increase social aspect resilience and prepare the community to face earthquake disasters. One of the non-structural mitigation efforts that can be done is by providing education or training. The economic aspect also needs to be improved with several non-structural mitigation alternatives such as increasing and creating jobs and developing micro, small, and medium enterprises by maximizing the potential of local resources.
Evaluation of Catchment area delineation Methods: Comparison of TOPAZ on WMS with HEC-HMS 4.12 Setiyowati, Yunita Ayu
Geosfera Indonesia Vol. 10 No. 2 (2025): Geosfera Indonesia
Publisher : Department of Geography Education, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/geosi.v10i2.53253

Abstract

This research evaluates the results of the Jatigede Dam Catchment area delineation using two different methods, HEC-HMS 4.12 and WMS TOPAZ, by utilizing three Digital Elevation Model (DEM) resolutions: DEMNAS 8.29 m, ASTER 30m, and SRTM 90 m. The analysis results show that the higher the DEM resolution used, the greater the resulting area similarity between the two methods. At an SRTM resolution of 90 m, the resulting Catchment area is 1474.41 km² (WMS) and 1468.03 km² (HEC-HMS ). At 30 m ASTER resolution, the resulting Catchment area is 1467.88 km² (WMS) and 1465.03 km² (HEC-HMS ). Meanwhile, the DEMNAS resolution of 8.29 m shows a Catchment area of 1462.64 km² (WMS) and 1462.91 km² (HEC-HMS ). Significant differences in results are seen at lower DEM resolution, especially in the aspect of main river length and basin length, which is caused by limitations in topographic representation. At an SRTM resolution of 90 m, the resulting length of the main river is 44368.54 m (WMS) and 34960.17 m (HEC-HMS ), while at a DEMNAS resolution of 8.29 m the length of the main river reaches 58195.707 m (WMS) and 42537.38 m (HEC-HMS ). These findings emphasize the importance of choosing the right DEM resolution to achieve accurate and consistent delineation results, especially in hydrological applications.
Experimental Investigation of Wrap-Faced Reinforced Soil Embankments on Soft Clay: A Sustainable Solution for Infrastructure Development in Bangladesh Hore, Shoma; Alim, Mosharof Al; Hore, ripon
Geosfera Indonesia Vol. 10 No. 2 (2025): Geosfera Indonesia
Publisher : Department of Geography Education, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/geosi.v10i2.53689

Abstract

Wrap-faced reinforced soil retaining walls are a widely accessible solution globally, especially in areas where land use is a concern. The wrap-faced layer requires less space on both sides of the wall, making it a more economical and efficient option, and it is less vulnerable to dynamic loading. Incorporating dynamic loading in the design phase is crucial; however, current embankment projects in Bangladesh do not account for this aspect. Traditionally, sand embankments are constructed atop soft clay layers in road and railway embankment projects in Bangladesh. This research proposes the use of a wrap-faced embankment system on soft clay, piloted based on shake table test results conducted at the Bangladesh University of Engineering and Technology. Various governmental agencies, including the Roads and Highways Department, Local Government Engineering Department, and Bangladesh Railway, are involved in the construction of embankments, which typically require large land areas, especially for embankments with slopes of 1:2 or 1:3. This significant land requirement often becomes a limitation. In contrast, the wrap-faced embankment system offers a viable solution to the land scarcity issue, as it minimizes horizontal space usage and reduces construction costs compared to traditional embankments. This research details the proposed construction process and the modeling of the wrap-faced embankment system, offering insights into its potential for improving embankment design and land utilization in Bangladesh.
Forecasting Rainfall and Temperature Trends in Bangladesh Based on Historical Data Analysis Hore, Shoma; Kamrul, Md Kamruzzaman; Alim, Mosharof Al; Hore, ripon
Geosfera Indonesia Vol. 10 No. 3 (2025): Geosfera Indonesia
Publisher : Department of Geography Education, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/geosi.v10i3.53690

Abstract

This study examined temperature and precipitation trends and spatial variations over a 40-year period at 34 meteorological stations in Bangladesh. Climate variability was assessed using a variety of statistical techniques, such as geographic information systems (GIS), inverse distance weighting (IDW) interpolation, linear regression, and coefficient of variation. The temperature and precipitation data were simulated using an autoregressive integrated moving average (ARIMA) model. With an average temperature increase of 0.20 °C every ten years, the results showed a significant warming trend. Northern, central, and southern regions saw the largest increases in minimum temperatures (from 0.80 to 2.4 °C), while southern and southeastern regions saw the largest increases in maximum temperatures (1.20 to 2.48 °C). Although pre-monsoon and post-monsoon rainfall showed declines of 0.75 mm and 0.55 mm per year, respectively, with significant variability in these seasons (44.84% and 85.25%, respectively), annual precipitation showed an upward trend (+7.13 mm per year). Projections for 2011–2020 suggest a temperature rise of 0.018 °C annually, potentially resulting in a 1.0 °C increase compared to 1971. Minimum temperatures are expected to rise more sharply (0.20 °C) than maximum temperatures (0.16 °C). Annual precipitation is predicted to decrease by 153 mm, with drying conditions anticipated in northwestern, western, and southwestern regions during pre- and post-monsoon periods.
The Impact of Residents’ Involvement in the Spatial Transformation of Inner-City Slums in Ibadan Adeniji, Temitope Abigail
Geosfera Indonesia Vol. 10 No. 2 (2025): Geosfera Indonesia
Publisher : Department of Geography Education, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/geosi.v10i2.53697

Abstract

Residents' active participation is crucial in influencing the transformation of inner-city slums, especially in fast-growing cities like Ibadan. Recognizing this role is crucial for developing inclusive planning strategies that effectively address the actual needs of the urban poor. This research examined the impact of community involvement on urban changes in Ibadan’s core areas, Oyo State, Nigeria, from 1990 to 2020. A structured survey of 552 residents from selected slum communities measured their participation in city transformation efforts, focusing on social and environmental improvements, resource allocation, the effectiveness of interventions, and challenges to slum redevelopment. Analysis using the Social Sciences Statistical Package (SPSS) showed that residents’ participation had limited influence on revitalizing Ibadan’s inner-city slums. The primary participation methods were consultations (35.7%) and incentives, such as gifts (27.2%). Despite efforts to involve communities in planning, major obstacles persisted, including corruption, bureaucratic delays, political interference, mismanagement of funds, limited capacity, poor coordination, delays, and insufficient funding (30%) of urban renewal funds were reportedly misused. Persistent challenges such as degraded infrastructure, poor socio- environmental conditions, and ineffective transformative initiatives remain prevalent, with a Slum Deprivation Index (SDI) indicating high levels of residential and environmental deprivation (RED) and water, sanitation, and hygiene (WASH) deprivation across the study areas. The study concludes that comprehensive and inclusive participation is essential for sustainable urban development. It contributes to ongoing discourse on the effectiveness of spatially and politically driven participatory approaches in urban settings, advocating for policies that prioritize periodic urban renewal and robust community involvement.
Carbon Sequestration Strategies: Evaluating the Potential of Reforestation and Soil Management Vijai, C
Geosfera Indonesia Vol. 10 No. 2 (2025): Geosfera Indonesia
Publisher : Department of Geography Education, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The increasing awareness of atmospheric carbon dioxide is the first driver of weather exchange, prompting pressing global efforts to identify effective carbon sequestration strategies. Among these, reforestation and soil management have emerged as promising natural solutions. This study evaluates the capability of these strategies in taking pictures and storing atmospheric carbon sustainably. Reforestation, through the healing of wooded area ecosystems, enhances biomass accumulation and long-term carbon storage, at the same time as advanced soil management practices, which include conservation tillage, biochar application, cover cropping, and growth of soil organic carbon levels. This study severely analyses the carbon sequestration capacity, price-effectiveness, and co-benefits, which include biodiversity conservation and soil fitness development related to every technique. It also addresses the challenges, together with land availability, maintenance prices, and socio-monetary elements influencing large-scale implementation. By synthesizing current case studies and scientific facts, the paper provides a complete evaluation of how reforestation and soil control can contribute meaningfully to worldwide climate change mitigation techniques.
Spatial Determinants of Recurrent Landslides Revealed Through Multi-Source GIS–Remote Sensing Integration in Kindo Didaye, Wolaita Zone, Ethiopia Dabara, Deneke Dana
Geosfera Indonesia Vol. 10 No. 3 (2025): Geosfera Indonesia
Publisher : Department of Geography Education, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/geosi.v10i3.53699

Abstract

Landscape failure and associated landslide occurrence is one of common problem in many parts of the world in hilly and mountain areas. Study in such areas could enhance proper land use management practices. The objective of this study was to assess root causes of landslides occurrence with the use of Remote Sensing (RS) and GIS. In this study analytical hierarchy process (AHP), Spatial Multi-criteria evaluation (SMCE), and weighted linear combination (WLC) were used to produce landscape and landslide susceptibility map. In order to identify major causes of landscape failures and associated landslide problem field observation, Focus Group Discussion, and Key Informant Interview methods were employed. Geology (0.32), Slope steepness (0.24), soil texture (0.19), aspect (0.08) and drainage density (0.05) were found major causes for landslide susceptibility. Five susceptibility zones were identified in the study area. From the total area(308.44km2): very high susceptibility (28.75%), high susceptibility (22.46%), moderate susceptibility (20.97%), low susceptibility (8.01%), and very low susceptibility (19.81%). This shows that about 70.21% of the region in the south and east are prone to moderate to very high levels of landslide susceptibility. Information obtained from FGD and KII revealed that major causes of landslide occurrences besides to physical problems were landscape failures due to removal of indigenous plants around farmland boundaries, stream courses, hill sides and absence of modern landscape based soil and water conservation practices. Therefore, intervention with integrated indigenous and modern farmland management as well as income diversification for the farming communities is highly recommended.
Exploring the Role of Socio-Economic Factors in Maintaining Biodiversity in Protected Biosphere Reserve Nuwarinda, Henry
Geosfera Indonesia Vol. 10 No. 3 (2025): Geosfera Indonesia
Publisher : Department of Geography Education, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/geosi.v10i3.53700

Abstract

Socio-economic factors and conservation of biodiversity interplay is very important but understudied especially in the biosphere reserves. This paper evaluates the contribution of socio-economic factors in sustaining biodiversity in Vhembe Biosphere Reserve, which is abundant in biological diversity and heritage. The study employs the mixed-methods strategy in which the quantitative method is applied using the data provided by the Statistics South Africa (SSA) census on education, employment, and income level to determine the relationship between this data and the concept of biodiversity conservation. The factors are identified as major contributors to biodiversity destruction in the region. The data on loss of biodiversity were obtained through SSA and analysed using R-Studio with multiple logistic regression. The model that best fit was the level of education, the lowest AIC was 66.33, which indicates that the level of education is a significant contributor to the degradation of biodiversity. It is worth noting that the education levels of “No schooling”, “Some primary” and “Some secondary” had a great impact on the biodiversity variable. “No schooling” was the most significant negative variable that influenced the loss of biodiversity. The research highlighted how environmental education and awareness can be utilised to conserve natural resources. The solution to these socio-economic driving factors would contribute to achieving a sustainable equilibrium between human development and the ecological conservation of the Vhembe Biosphere Reserve. The study will help in comprehending the effects of socio-economics on biodiversity and offer practical implications to policymakers and conservationists around the world.

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