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INDONESIA
Indonesian Journal of Geography
ISSN : 00249521     EISSN : 23549114     DOI : -
Core Subject : Science,
Indonesian Journal of Geography ISSN 2354-9114 (online), ISSN 0024-9521 (print) is an international journal of Geography published by the Faculty of Geography, Universitas Gadjah Mada in collaboration with The Indonesian Geographers Association. Our scope of publications includes physical geography, human geography, regional planning and development, cartography, remote sensing, and geographic information system. IJG publishes its issues three times a year in April, August, and December.
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Articles 14 Documents
Search results for , issue "Vol 51, No 2 (2019): Indonesian Journal of Geography" : 14 Documents clear
Groundwater Vulnerability from Sea Water Intrusion in Coastal Area Cilacap, Indonesia Setyawan Purnama
Indonesian Journal of Geography Vol 51, No 2 (2019): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (635.627 KB) | DOI: 10.22146/ijg.18229

Abstract

The important issue relating to water resources is sea water intrusion (SWI) phenomena. Nowadays, the phenomena has become serious problem in the urban coastal area. Groundwater as main sources for domestic usage cannot be used again because of its salinity.Cilacap as one of urban coastal area also face the problem. In 1977 SWIwas detectedand experienced significant developmentsin 1996,This research was conducted to: (1) analyze agroundwater vulnerability to the SWI; (2) determine adistance and adepth theinterface; and (3) analyze relationship of the groundwater vulnerability to the interface depth.It was performed an analysis of the groundwater vulnerability to the SWI using the method of GALDIT, whereas the distance and depth of the interface was determined using the method of DupuitGhyben-Herzberg. The linkage analysis of the groundwater vulnerability to the depth of the actual interface was conducted by quantitative descriptively.The results showed that the distance from the shoreline was the most determined factor of the groundwater vulnerability to the SWI, the closer to the shoreline the more swallow the depth of the interface.  It existed the relevance between the vulnerability level of groundwater to the SWI with the depth of actual interface. The regions with low level of vulnerability had deep interface depth, whereas the regions with moderate level of vulnerability had swallow interface depth.  Nevertheless, the SWI has not yet affected the groundwater in people wells because of its depth that was not yet exceeded of 25 m.so that this depth can be used as a reference in digging wells in the research area++
The Effect of Baseline Component Correlation on the Design of GNSS Network Configuration for Sermo Reservoir Deformation Monitoring Subagyo Pramumijoyo; Nurrohmat Widjajanti; Yulaikhah Yulaikhah
Indonesian Journal of Geography Vol 51, No 2 (2019): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (146.707 KB) | DOI: 10.22146/ijg.44914

Abstract

The condition of the geological structure in the surrounding Sermo reservoir shows that there is a fault crossing the reservoir. Deformation monitoring of that fault has been carried out by conducting GNSS campaigns at 15 monitoring stations simultaneously. However, those campaigns were not well designed. With such a design, it took many instruments and spent much money. For the next GNSS campaign, it should be designed so that the optimal network configuration is obtained and the cost can be reduced. In the design of deformation monitoring network, sensitivity criteria become very important for detecting the deformations. In GNSS relative positioning, the baseline components are correlated, but this correlation is often ignored. This research examined the effect of baseline component correlations on the design results of the GNSS configuration of the Sermo Fault network based on sensitivity criterion. In this case, the western side of the fault was taken as a reference, while the other side as an object moving relatively against the western side. This study found that the baseline component correlation affects the results of GNSS network configuration. Considering the correlation could result a sensitive network configuration with a fewer baseline; therefore, the cost and time of field surveys can be reduced. It can be said that the baseline component correlation needs to be taken into account in the configuration design of deformation monitoring network.
Map of Sky Brightness over Greater Bandung and the Prospect of Astro-Tourism Rhorom Priyatikanto; Agustinus Gunawan Admiranto; Gerhana Puannandra Putri; Elyyani Elyyani; Siti Maryam; Nana Suryana
Indonesian Journal of Geography Vol 51, No 2 (2019): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (611.195 KB) | DOI: 10.22146/ijg.43410

Abstract

In this paper, result of moving campaigns of night sky brightness measurement over Greater Bandung area is reported. Though the campaigns were not commenced in ideal condition in terms of cloud cover and moon light contamination, the result is quite convincing. The obtained value of sky brightness range from ~17 mpsas at downtown region to ~20 mpsas at Haurgombong, Sumedang which is more than 30 km away from the city center. It is in agreement with months-length stationary measurements of sky brightness over Bandung, Lembang, and Sumedang. This result can be combined with nighttime satellite imagery from Defense Meteorological Satellite Program Operational Linescan System (DMSP-OLS) to produce the map of sky brightness over Greater Bandung area. This map is important product for regional planning and discussing the prospect of astro-tourism.
Waste Scavenging and Its Contribution for Survival and Urban Recycling in Kota Kinabalu City, Sabah, Malaysia Mohammad Tahir Mapa
Indonesian Journal of Geography Vol 51, No 2 (2019): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (231.207 KB) | DOI: 10.22146/ijg.42301

Abstract

 High generation of solid waste has been identified as one factor contributing to the world’s environmental problems, and the decrease in suitable landfill sites and scarcity of natural resources is creating greater demand for remanufacturing and reuse. This study aims to examine the contribution and issues embedded in scavengers group to achieved high rate of recycling in waste management program. In order to answer the research objective, this research utilized in-depth interviews conducted with scavengers group. This study revealed scavenging activity is an important element in waste management with positive impact on the economic and environment. Therefore, to support this, the scavengers group need to be part of the government’s attempt to realise its recycling objectives.
Habitat Suitability Mapping of Rastrelliger Brachysoma Using MODIS Image in WPP 711 Prama Ardha Aryaguna
Indonesian Journal of Geography Vol 51, No 2 (2019): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (798.923 KB) | DOI: 10.22146/ijg.39919

Abstract

Important factors that needs to be understood in the management of fishery resources is fish habitat. Fish habitat is an ideal water conditions of a fish species to spawn, breed, feed and grow into adults. Distribution of fish habitat can be approach using variety method, such Habitat Suitability/Species Distribution Modeling. Remote sensing analysis is effective method in providing daily oceanography information. Modis is Remote sensing imagery can be used for modeling Rastrelliger brachysoma fish habitat. Date acquired MODIS image at 28 March 2015, depend on existing field data. The results indicate that, the highest probability of Rastrelliger brachysoma fish habitat location in WPP 711 are in the middle waters of the WPP border between the deep sea of Indonesia and the Pacific Ocean. The lowest probability value for habitat of Rastrelliger brachysoma fish is in the southern shallow waters of Bangka Belitung island which is around 0.1-0.25.
Digital Divide and Poverty Eradication in the Rural Region of Northern Peninsular Malaysia Sharifah Rohayah Dawood
Indonesian Journal of Geography Vol 51, No 2 (2019): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1396.224 KB) | DOI: 10.22146/ijg.37758

Abstract

 One of the ways to eliminate poverty is through Information and Communication Technologies (ICTs) that is often promoted as central to reviving and sustaining regional communities. In the context of Malaysia, however, the level of communication in urban and rural areas has seen a gap in terms of access to ICTs. Though various initiatives are taken to close the digital gaps, more efforts are needed. This paper intends to explore the extent to which ICTs in rural areas of northern Peninsular Malaysia are able to raise the socio-economic development of the communities. Using questionnaires and in-depth interviews, emphasis is given to analyze the role of ICTs in poverty reduction processes upholding regional developments. It has been observed that solving common causes for the communities’ access and socio-economic growth needs strategic implementation of policies at the central core and pragmatic implementation of actions at the grass root level.
Implication of Catchment Morphometric on Small River Discharge of Upper Citarik River, West Java Edi Tri Haryanto; Emi Sukiyah; Pradnya Paramarta Raditya Rendra; Hendarmawan Hendarmawan; Suratman Suratman
Indonesian Journal of Geography Vol 51, No 2 (2019): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (722.896 KB) | DOI: 10.22146/ijg.36472

Abstract

Upper Citarik River is the Inter Mountainous Valley of Volcanic Denudational Landform in the eastern part of Bandung basin, West-Java. The research area compounds of several degraded small catchments with very low water flow in dry season. This research aims  to understand the implications of morphometric characteristics (Slope, Cr, Dd, Hi) on average river flow discharge of small sub-catchments of Upper Citarik River. Discharge data collected based on measurements, while catchments morphometric identified and analyzed based on topographic map using GIS techniques.  Correlation graphs were used to understand the relationship among the morphometric parameter and the average river flow discharges. The result were as follow  the steeper the slope, the more elongated the shape of catchment, the more distant was the river density,  meaning the more younger the erosion cycle of the landform.  The younger the erosion cycle of the landform, the smaller was the average river discharge per areal unit of catchments.
Change Detection in Landuse/ Landcover of Abeokuta Metropolitan Area, Nigeria Using Multi-Temporal Landsat Remote Sensing Adebayo Oluwasegun Hezekiah; Otun. W. O; Daniel, I. Samuel
Indonesian Journal of Geography Vol 51, No 2 (2019): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2981.376 KB) | DOI: 10.22146/ijg.35690

Abstract

This research paper examined the changes in land use/ land cover of Abeokuta, Nigeria between 1984 and 2015 using Multi-Temporal Landsat Remote Sensing paired with Geographic Information System (GIS) techniques. The evaluation of the trend, rate and magnitude changes was the objectives of this study.  Five Landsat satellite images of different dates,  i.e., Landsat Thematic Mapper (TM) of 1984, 2001, 2006, 2011 and 2015 with spatial resolution ranging from 15, 30 and 60metres were obtained from National Aeronautics Space Administration(NASA),United State Geological Survey Website and  GIS facility of Sioux Falls Website  and quantify the changes  over a period of thirty-one (31) years. Supervised classification methodology was applied to the acquired multi-band raster imageries using maximum livelihood technique in ERDAS Imagine 9.3. The images of the study area were classified into three (3) classes namely; vegetation, water body and built-up area and were overlay with vector maps of the study area generated in ArcGIS 10. The results show that for the period of 31years (1984-2015), vegetation which covered 76.20% of the total area has decreased to 39.29%, water body decreases from 6.63% to 1.89% while the built –up area which initially was 17.14% as at 1984 increased to 58.82%. The study, however, recommended that there is a need for a timely Land use/ Land cover mapping of the entire Abeokuta and its environs in order to reduce the effects of undiscrimate land utilization in the area. This will also facilitate necessary Land use planning and forestall the rising sprawl not only in Abeokuta but also in other urban centres.
Investigating Groundwater Quality in the Flood Prone Neighborhood Area in Malaysia Nasir Nayan; Yazid Saleh; Mohmadisa Hashim; Hanifah Mahat; Koh Liew See
Indonesian Journal of Geography Vol 51, No 2 (2019): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1180.569 KB) | DOI: 10.22146/ijg.35589

Abstract

The purpose of this study is to compare the quality of groundwater during wet and dry seasons in Malaysia especially in Kuala Krai District which frequently involved in annual monsoon floods and the question whether the wells can be used during floods as well as an alternative source when there are no floods. Six sampling stations were selected using six main parameters which included DO, pH, BOD, COD, TSS and NH3N. The assessment was conducted based on the standards set by Malaysian INWQS and the classification of WQI. The results of the analysis showed that most of the water samples taken during the wet season had concentration values that did not meet the DOE standards such as the DO, BOD, and NH3N parameters. Based on the WQI classification, majority stations during the wet season were in moderately contaminated except for station T6 which was clean. On the contrary, during a dry season were found to be clean except for station T1 which was moderately contaminated.
The Intervention of Rural Enterprise Development Hub Project on Maize Production in Mqanduli: The Implication on Food Security Status of Maize Farmers Sonwabo P. Mazinyo; Werner Nel; Enoch Terlumun Iortyom
Indonesian Journal of Geography Vol 51, No 2 (2019): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3716.584 KB) | DOI: 10.22146/ijg.34644

Abstract

The research analyzed the impact of the Rural Enterprise Development Hub Project (RED Hub Project) on food security of maize farmers. The data were analyzed using both inferential and descriptive statistics. Values were considered to be significant statistically where the P-value was less than 0.05. The study reveals a significant average increase in annual yield from 39.52 bags (50kg) to 87.02 bags (50kg) with a percentage increase of 120.19% per maize farm (t-statistics of 32.7 t-value and p-value of <0.05). Also, none of the maize farmers were food secure before the RED Hub project, 1 (0.5%) were mildly food insecure, 97 (48.5%) were averagely food insecure, and 102 (51%) were critically food insecure. After the RED Hub project intervention, 3.5% (7) are food secure, 104 (52%) are mildly food insecure, 76 (38%) are averagely food insecure and 13 (6.5%) critically food insecure. There was also more access and affordability of other food to meet maize farmers’ nutritional needs after the project intervention. An average of 72.5 (29.2%) beneficiaries and 99.3 (47.6%) beneficiaries respectively had access to other foods to meet their nutritional needs before and after the project intervention.

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