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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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Women and The Poverty Trap (Study on The South Merapi Slope) Hastuti Hastuti; Sri Agustin Sutrisnowati
Geosfera Indonesia Vol. 8 No. 2 (2023): GEOSFERA INDONESIA
Publisher : Department of Geography Education, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/geosi.v8i2.34798

Abstract

The infection rate of COVID-19 has forced many households into economic hardship when poverty strikes, women are the most affected. In rural areas, the beginning of the poverty trap is economic difficulties in addition to reduced arable land. The research was conducted in Girikerto Kapanewon Turi District, women in the research areas experience increasingly complicated poverty traps. This study aims to find out the social conditions and economic conditions of women during COVID-19, the second objective is to find out the efforts made by women to escape from household poverty during the COVID-19 pandemic, and third to find out how women find alternative social and economic activities during COVID-19. To examine primary and secondary data related to demographics, descriptive quantitative data analysis is essential. Frequency tables are utilized to describe the distribution and pattern of features of particular variables. The demographic characteristics of women in the research region are dominated by their productive age, high school/vocational education, their status as housewives, and their employment in agriculture. The result show women can still meet their food needs from their limited agricultural land. The poverty trap experienced by women is the difficulty in fulfilling household needs other than food such as the cost of educating children, the health of household members, and transportation. Women manage household finances by tightening the fulfillment of household needs, even women have to sacrifice setting aside the fulfillment of their own needs in order to meet the minimum household needs. Women to get out of the poverty trap take advantage of social relations, family ties, and government assistance, even when women have access to look for alternative income, women try to find additional income by working modestly. Keywords : Women; poverty trap; south merapi slope Copyright (c) 2023 Geosfera Indonesia and Department of Geography Education, University of Jember This work is licensed under a Creative Commons Attribution-Share A like 4.0 International License
Analysis of the Spatial Distribution of Seawater Intrusion Using a Hydrogeochemical Approach: A Study of the Coastal Geology of Kebumen Regency, Indonesia Faidatuz Zahroh; Muhammad Asyroful Mujib; Sri Astutik; Bejo Apriyanto; Era Iswara Pangastuti
Geosfera Indonesia Vol. 9 No. 2 (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.v9i2.34885

Abstract

This study examines seawater intrusion in the southern part of Kebumen District, focusing on the impact of various geological formations on groundwater salinity. Groundwater samples were systematically collected from 11 locations representing alluvial, volcanic, coastal sediment, and karst geological conditions. The samples were analyzed for major ions, including calcium (Ca²⁺), magnesium (Mg²⁺), chloride (Cl-), and bicarbonate (HCO₃-), as well as Total Dissolved Solids (TDS). Ion ratios such as Mg²⁺/Ca²⁺, Cl⁻/HCO₃⁻, and Mg²⁺/(Mg²⁺+Ca²⁺), along with the Fraction of Seawater (fsea), were calculated to assess the extent of seawater intrusion. The study employed the Gibbs diagram method to identify the primary processes controlling groundwater chemistry, revealing that water-rock interactions are dominant in most samples, particularly in those affected by seawater intrusion. The results indicate significant seawater intrusion in alluvial and karst regions, especially at sampling points TP 2, TP 4, and TP 10, while volcanic and coastal sediment areas show minimal intrusion. These findings underscore the critical influence of geological conditions on seawater intrusion and highlight the need for targeted groundwater management strategies. Further research focusing on long-term monitoring is recommended to better understand and mitigate the impacts of seawater intrusion in this region.
The Development of Sustainable Tourism Destination Area: Spatial Planning in The Tuktuk Siadong Tourist Village, Samosir Regency Wahyu Hidayat; Muhammad Baiquni; Andri Kurniawan
Geosfera Indonesia Vol. 8 No. 2 (2023): GEOSFERA INDONESIA
Publisher : Department of Geography Education, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/geosi.v8i2.35002

Abstract

Lake Toba is still surrounded by a stunningly lush environment and one of the biggest lakes in Asia and the world. Gradually, this tourist destination began to be recognized by the people of Indonesia and also the world. The tourist village located in Tuktuk Siadong Village is in an area of the peninsula of Lake Toba, in this tourist village you can find many hotels with various choices and always offer direct views of Lake Toba. This study aimed to describe the spatial development of Tuktuk Siadong Village in Samosir Regency based on tourist destination attributes such as tourist attractions and tourist characteristics. This study used a qualitative descriptive methodology to assess spatial development considering the attributes of popular tourist sites, including tourist attractions and visitor traits. The results showed that the spatial development in the study area was more spread out following the existing circulation path and following the traditional Batak development pattern which produces clusters and is unrelated to the major transportation channel. Tuktuk Siadong Village will become a tourist destination, with cultural tourism attractions from Huta Batak in sight. The landscape, which is a component of the spatial structure, must be preserved along with traditional settlements. The spatial development of the tourism area on Lake Toba can refer to the model that has been prepared so that it can make tourism on Lake Toba in a better and more sustainable direction. Keywords : Sustainable Tourism; Tourism Village; Local Wisdom; Lake Toba Copyright (c) 2023 Geosfera Indonesia and Department of Geography Education, University of Jember This work is licensed under a Creative Commons Attribution-Share A like 4.0 International License
Exploration of Knowledge and Community Preparedness in Flood Disaster Mitigation Erman Syarif; M. Maddatuang; H. Hasriyanti; Alief Saputro
Geosfera Indonesia Vol. 7 No. 3 (2022): GEOSFERA INDONESIA
Publisher : Department of Geography Education, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/geosi.v7i3.35066

Abstract

Floods are natural disasters that should be highly considered due to their threats to human lives and the economy. It is also the third largest natural disaster in the world, which has claimed many lives and properties. Therefore, this study aims to identify community knowledge about floods and determine the efforts to increase preparedness strategies. A qualitative study was conducted in the village of Sapanan, Binamu District, Jeneponto Regency, Indonesia. Subsequently, data collection was carried out by observation, interviews, and documentation with various selected informants. Based on the results, the following were obtained, 1) The level of knowledge and actions performed by the Sapanan people was quite good regarding flooding. This was due to the experience of the community with the disaster, which they had decided to use as a learning platform, 2) The impacts often caused after flooding were the outbreaks of many diseases, which hindered the community from performing their usual activities. This was because they were busy cleaning their homes, with children consequently unable to attend school regarding the muddy state of the chairs and environment, and 3) The community's efforts to increase preparedness for the disasters included land use monitoring and prone location planning in safe areas. In this case, the level of knowledge and actions performed by the people of Sapanan village was quite good concerning flooding. This was because of their numerous experience with the disaster, which they had decided to use as a learning platform. Keywords : knowledge; preparedness; the community; flood Copyright (c) 2022 Geosfera Indonesia and Department of Geography Education, University of Jember This work is licensed under a Creative Commons Attribution-Share A like 4.0 International License
Analysis of Sea Surface Dynamics during the Coastal Floods in Manado Audia Azizah Azani; Usman Efendi
Geosfera Indonesia Vol. 8 No. 1 (2023): GEOSFERA INDONESIA
Publisher : Department of Geography Education, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/geosi.v8i1.35091

Abstract

Coastal flooding is one of the serious problems facing most coastal areas in the world. On January 17 and December 7, 2021, coastal flooding hit the coastal area of Manado, North Sulawesi, Indonesia. The disaster disrupted economic activities on the coast of Manado Bay. This study analyzed the dynamics of the atmosphere and the sea during coastal flood events using water level data from the Geospatial Information Agency, which was then filtered to separate residual and atmospheric tide, and oceanographic reanalysis data of Wavewatch-III from BMKG Ocean Forecast System (OFS). The results show that events on January 17 and December 7, 2021, coincided with the occurrence of the maximum tide. The residual water level shows a significant value of around 0.2 – 0.3 m, indicating the influence of atmospheric phenomena on sea level rise. According to oceanographical data, the local wind is the main factor of flood occurrence, which is shown by wind speed data which increased wave height significantly to 1,5 m on January 17, 2021, and to 2,0 m on December 7, 2021, around Manado Bay coast. Another factor that might contribute to the event is Manado's land morphology. Further study must be conducted to discover the influence of land morphology on coastal floods.
Emergency Response Demand and Supply: A GIS-Based Network Analysis for Fire Station’s Service Coverage Delineation in Kano Metropolis, Nigeria Sulaiman Yunus; Julius Afolabi Falola; Ibrahim Musa Jaro
Geosfera Indonesia Vol. 8 No. 1 (2023): GEOSFERA INDONESIA
Publisher : Department of Geography Education, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/geosi.v8i1.36694

Abstract

Inadequate fire emergency response infrastructure and a lack of defined service coverage remain key barriers to timely fire disaster response. This study is applied research which employed geospatial techniques and aimed at examining fire disaster emergency response demand and supply relationships with the view to delineating service coverage and locating more facilities for optimum coverage in Kano metropolis. Locations of the existing fire stations and fire incidents (2009-2019) were gathered through GPS surveying. Network data set were generated. Nearest Neighbor and Network Analysis (origin-destination, service coverage and location-allocation) were conducted to determine emergency response demand and supply relationships, service coverage area delineation and identifying best site for allocating new facilities within the metropolis respectively. It was found that no clearly defined service coverage exist as emergency response supply takes more than 4-8 times the NFPA travel standard, and with a great deal of overlapping response patterns. New service coverage areas were proposed and best sites for 8 firefighting facilities identified for optimum coverage. It is concluded that emergency fire disaster response demand and supply relationships within Kano metropolis is imbalanced, with extensive recurrent demand especially within the core area served by overstretched and inefficient response supply. This, therefore, implies continuous exposure of lives and properties to the menace of fire disaster in Kano metropolis.
Contamination of E.coli Bacteria in Spamdus Genjahan Water Distribution Network from Karst Groundwater Source Eko Budiyanto; Nugroho Hari Purnomo; Muzayanah Muzayanah; Aida Kurniawati
Geosfera Indonesia Vol. 9 No. 1 (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.v9i1.37040

Abstract

Karst groundwater is raw water used by Spamdus Genjahan to fulfill domestic water needs. Considering the vulnerability of karst groundwater to pollution and its distribution process, the research aimed to describe the suitability of water in the network as well as the spatial distribution of E.coli and the relationship between distance and it’s concentration. The concentration of E.coli was tested from water samples taken from 20 outlets as representatives of the close, medium and farthest distances from the source. The feasibility of water is carried out by comparing the results of laboratory tests with the water quality threshold value for clean water and domestic purposes. Spatial distribution was analyzed through spatial analysis using Geographic Information Systems, while the relationship between distance and E.coli concentration was carried out using the scatterplot method in GIS. The results showed that the concentration of E.coli in most of the samples was above the allowable threshold for sanitation hygiene purposes. Meanwhile, the distance from the outlet to the source did not show a strong correlation with the level of E.coli concentration. However, there are weak indications that lead to an increase in concentration with the E.coli.
The Use of Sentinel-2A Images to Estimate Potential Flood Risk With A Multi-Index Approach in The Mempawah Watershed Ajun Purwanto; Paiman Paiman; Agus Sudiro
Geosfera Indonesia Vol. 8 No. 1 (2023): GEOSFERA INDONESIA
Publisher : Department of Geography Education, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/geosi.v8i1.37156

Abstract

Natural disasters in Indonesia have become an annual cycle, an example is flooding. This study aims to determine the flood risk potential in the Mempawah watershed and the places likely to be flooded. The method used was a survey and interpretation of secondary data from topographic maps, Sentinel-2A images, and Digital Elevation Model images. Furthermore, the secondary data analysis used includes the Standardized Precipitation Index (SPI), Normalized Difference Vegetation Index (NDVI), Normalized Difference Water Index (NDWI), Soil Adjusted Vegetation Index (SAVI), and Inverse Distance Weighted (IDW). The result showed that the Mempawah watershed has high, medium, and low flood risk potential. Areas with high flood potential have an area of 1,511,967 ha, those with medium potential were 2,606,778 ha, and the places with low potential were 12,644,034 ha. The changes in class user's accuracy results reached 90.909%, while those with no change were 83.333%. It was also discovered that when the satellite analysis was > 70%, it was regarded as good. This means that the accuracy of the interpretation results and flood change detection approach was also good.
2D and 3D Modelling Electrical Resistivity Tomography (ERT) of Landslide Sliding and Weak Bedding Plane Along Mountain Road North Bengkulu-Lebong, Indonesia Suhendra Suhendra; Jesika Erni Elfrita Sinaga; Darmawan Ikhlas Fadli; Halauddin Halauddin; Supiyati Supiyati
Geosfera Indonesia Vol. 9 No. 1 (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.v9i1.38065

Abstract

The North Bengkulu-Lebong Mountain Road is prone to landslide disasters due to its geological susceptibility to land movement. This study aims to measure and assess the sliding plane on the mountain road, particularly in the layer with a soft rock structure, such as clay rock. The study utilizes 2D and 3D Electrical Resistivity Tomography (ERT) methods with the Wenner-Schlumberger configuration to measure the resistivity of the rock layers.The research includes one 2D measurement point and one 3D ERT measurement point, estimating actual resistivity values in each rock layer. Our results identify triggering and controlling factors for landslide disasters in the research area. The geological conditions consist of layers of clay (200-500 Ωm), wet clay (500-900 Ωm), dry clay (1000-3000 Ωm), weathering clay (500-1000 Ωm), aquifer (10-65 Ωm), perched aquifer (100-200 Ωm), weathering igneous rock (>10000 Ωm), and massive intrusive rock (>20000 Ωm). These geological conditions significantly influence the strength of landslide materials, with the sliding of the soft rock layer causing landslides and resulting in a large volume of landslide material. Other contributing factors to landslides in this location include slope, topography, and hydrology, with extreme slopes ranging from 33° to 55°, making it a very steep area with high potential for landslides.
Heavy Rain Episodes Identified by L-band InSAR and Limitations of Split-Spectrum Method in Indonesia Naufal Setiawan; Masato Furuya
Geosfera Indonesia Vol. 9 No. 1 (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.v9i1.38154

Abstract

Located in a tropical area with abundant precipitation, Indonesia is highly prone to heavy rain hazards, in particular landslides and floods. Thus, rainfall observation is vital. Nonetheless, the topography, the fund availability, as well as the archipelagic state of Indonesia may raise difficulties for in-situ observation, such as rain gauge and weather radar. Currently, the advance of radiometer satellites, such as the Global Precipitation Mission delivers rain estimation and has proven to show good association with in-situ observation on a monthly basis, not daily over the Indonesia area. Therefore, it is vital to have additional measurement methods. For the first time, we apply L-band Interferometric Synthetic Aperture Radar (InSAR) to observe heavy rain in Indonesia. From our three study cases, we successfully identified localized anomalies due to the dense water vapor during heavy rain in the InSAR images. The localized anomalies vary from 10.9 cm in West Java, 7.8 cm in East Kalimantan, and 7.7 cm in West Kalimantan. Furthermore, we utilize the split-spectrum method for our InSAR result; the high-water vapor occurrence in the troposphere associated with heavy rain should be identified in the non-dispersive term. Nevertheless, due to long temporal separation and thinner bandwidth, the split-spectrum method results display unsatisfactory results. We conclude that, while InSAR has the ability to identify heavy rain, having SSM to distinguish between non-dispersive and dispersive phases is not currently practical in Indonesia.

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