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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 360 Documents
APPLICATION INTEGRATION METHODS ON LANDSAT ETM + TO DETERMINE EARTHQUAKE POTENTIALS IN PALU GRABEN H, M. Rusydi; ., Hartono; Hadi, M. Pramono; ., Sunarto
Indonesian Journal of Geography Vol 42, No 1 (2010): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

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Abstract

This study aims to assess the ability of the integration method at LandsatETM + imagery in recognizing object fault, main fault and secondary fault in PaluGraben. Mapping of fault and calculate earthquake potential, based of fault that isfound in Graben of Palu. The image used in this study is Landsat ETM +.Techniques used to process Landsat ETM + is a method of integration. LandsatETM+ imagery processed with ENVI software 4.4, while the mapping of faults anddetermining of length using ArcGIS 9.2.The potential of earthquakes is calculatedfrom the length of faults found in the Graben of Palu. Results obtained showed thatthe patterns of lineament as a picture of fault in the Palu Graben can be extractedfrom Landsat ETM +. Lineament of fault is seen clearly on Landsat ETM + imageprocessed with integration method and band combination, 45PC1_8. Faults arearranged in the form of map. There are 66 faults found at research sites.Magnitude earthquake 5,5 SR can be produced from the fault with a length greaterthan or equal to 9 km. If each faults contributes the same to earthquakeoccurrence, the potential incidence of earthquake with magnitude greater than orequal to 5.5 SR in the Graben of Palu is 33.8%, while the magnitude is smallerthan 5.5 SR is 66.2%. The largest magnitude that can occur in Palu Graben, 7.1SR. These results indicate that the potential earthquake destructive (≥ 5.5 SR) ofapproximately 33.8%.
FLOW PATTERNS OF VEHICULAR TRAFFIC ALONG HIGHWAY TOLL PLAZA IN OGUN STATE Raji, Bashiru A.; Muse, O. Solanke
Indonesian Journal of Geography Vol 41, No 1 (2009): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

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Congestion on our highways, freeways and arterials are increasing at an alarming rate. This occurs because there is an increase in vehicular growth without a corresponding increase in road size, and this has made free flow of traffic a preponderant problem in our highways. Toll plaza causes delay on our highways and results are formation of queue. This paper examined how simple queuing model can be used to determine traffic intensity and the flow pattern of car traffic at a toll plaza. The study was carried out with twelve field assistants at Ogere toll plaza in Ogun State. Findings show a significant variation in the degree of hourly traffic intensities at the four pay points for cars at the toll plaza. However, variation in the daily traffic intensities at the four pay points for cars showed no significant variation. The study also revealed that bumps constructed to check vehicles speed, hawker’s trading activities are among other factors that constitute hindrance to free flow of traffic other than service time and inter-arrival time of cars at the toll plaza. It is therefore recommended that appropriate authority should look into these factors and take necessary steps towards ensuring free flow of traffic at the plaza.
THE DISTRIBUTION OF FLOOD HYDROGRAPH RECESSION CONSTANT FOR CHARACTERIZATION OF KARST SPRING AND UNDERGROUND RIVER FLOW COMPONENTS RELEASING WITHIN GUNUNG SEWU KARST REGION Adji, Tjahyo Nugroho; Misqi, M.
Indonesian Journal of Geography Vol 42, No 1 (2010): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

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This research is carried out within two caves with underground river andone karst spring, which is located in Gunung Sewu karst area, Gunung Kidul. Theobjective of this research is to recognize some flood hydrograph properties of karstaquifer characterization in order to compare the comportment of aquifer to releaseits flow components between underground river and karst spring. Water level dataloggers are installed within two caves and one karst spring represent upper,middle, and lower elevation of karst topography, which are Beton, Seropan, andToto Cave, respectively. In addition, time series discharge measurement incorrespond to minimum, average, and maximum flow events is conducted toformulate the Annual Stage Discharge Rating Curve. Thereby, the full year riverhydrograph may be defined. Afterwards, by selecting several flood hydrographevents, the recession constant in each cave including diffuse flow (Kb), and fissureflow (Ki), and conduit flow (Kc) recession constant, is then calculated andcompared in every location. The result shows that Beton Spring that represents theupper part of research area confirms the quickest respond towards rainfall events.Also, this point specifies the medium number of diffuse recession constant(Kb=0.983), compared to Seropan (0.996), and Toto (0.937), means that theaquifer surrounding Toto Cave release its groundwater storage faster than BetonSpring and Seropan Cave. On the contrary, Seropan Cave performs the highestvalue of diffuse recession constant (0.996) and this situation is confirmed by its dryseason discharge that still above 810 lt/second.
LAND DEGRADATION ASSESSMENT, IN THE PERI-URBAN AREA OF KADUNA METROPOLIS, NIGERIA Oluwafemi, Adewuyi Taiye
Indonesian Journal of Geography Vol 41, No 1 (2009): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

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This study assessed land degradation in the peri-urban area of Kaduna metropolis from the perspective of land use and land cover with the aim of ascertaining the role of these variables and to suggest on how to manage their existing nature and characteristic. Random sampling method was used to collect data from field observation, measurement and semi-structured interview which are summarized and analyzed using descriptive statistics and presented in the form of tables and photographs. The results indicated that the existing nature and characteristic of land use and land cover cannot be exonerated from contributing to ongoing land degradation in the area for the following reasons: first, 6% of the area is already degraded, second, low average values for surface cover index (12.7%), leaf cover index (11.4%) and tree density (101 per 25,000m2), third, lost of vegetation biodiversity, fourth, absent of adequate conservation techniques to reduce the effects of crop farming and animal husbandry and lastly, evidence of problems already created by soil mining and refuse dumping. The situation in the study area calls for adequate land use and land cover planning, monitoring and management. 
URBAN SPRAWL OF THE CITY OF YOGYAKARTA,SPECIAL REFERENCE TO THE STAGEOF SPATIAL TRANSFORMATION (Case Study at Maguwoharjo Village, Sleman District) Giyarsih, Sri Rum
Indonesian Journal of Geography Vol 42, No 1 (2010): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

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The study was conducted in Maguwoharjo Village, Depok Sub-District,Sleman District, which is part of urban fringe area experiencing regionaltransformation. This study aims at understanding the regional transformationstages in the location studied. The survey method using in-depth interviews withsome informants was implemented. The data analysis was done descriptivequalitatively. From this study, it is found out that spatial distribution of regionaltransformation stages is closely associated with street connection and growthareas. Some areas directly bordering on Yogyakarta-Surakarta roads have higherregional transformation intensity than villages distant from the streets and growthareas.
LAND USE PLANNING FOR SETTLEMENTS AREA IN CONSIDERATION OF FLOOD AND LANDSLIDE HAZARDS IN BAGELEN SUB-DISTRICT, PURWOREJO INDONESIA Wulan Mey, Estuning Tyas; ., Sudibyakto; Kingma, Nanette C.
Indonesian Journal of Geography Vol 41, No 1 (2009): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

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The objective of this research is  determining alternative land use for settlement development considering  its hazards susceptibility.  Data were obtained by interviews, participatory GIS, direct-observation, sampling of soil  and secondary data analysis. The flood hazard map was produced using Kriging interpolation techniques; flood depth map for the largest flood in the year 2004 was created. The area with high landslide hazard is located on the hilly area in the eastern part of the area of study. The result from overlaying two hazard maps indicates that the area which considered as having less hazards  is located on the colluvial plain. The result of suitability analysis including hazard and people perception-based criteria showed that the area suitable is mostly located in Bagelen and Krendetan Villages. The result of suitability analysis of the non-hazard criteria showed that the area suitable  of which 338.1 Ha is an existing settlement. 
CARBON GAS CALCULATION AS A RESULT OF LANDUSE CHANGE BY USING MULTI TEMPORAL LANDSAT TM 7 IMAGES OF 1992-2007 IN LIMA PULUH KOTA REGENCY ., Ernawati; Suasanti, Yurni; Antomi, Yudi
Indonesian Journal of Geography Vol 42, No 1 (2010): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

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The objective of this research is to map landcover change, and releasedcarbon emission in Lima Puluh Kota Regency and Payakumbuh Municipality since1992 – 2007 by using rapid assessment approach based on Multi TemporalLandsat TM 7 Images (1997-2007) of the Remote Sensing Technology. The findingspresent nine landcover classifications identified in Lima Puluh Kota Regency andPayakumbuh Municipality. The current largest landcover change areas arePrimary Forest, and Secondary Forest. Land cover change in Lima Puluh KotaRegency and Payakumbuh Municipality during the period of 1992 – 2007 indicateseven distribution of biomass content in both areas. In total, land cover changesince 1992 - 2007 in Lima Puluh Kota Regency and Payakumbuh Municipalitycontributes to the release of 1,141,458,592 tons of carbon or 76,097,239 tons ofcarbon per year, with 4,185,348,171 tons of CO2 emissions. The data suggest thatduring that period, both areas contributed 279,023,209 tons of CO2 as greenhousegas affecting the Earth’s temperature which then led to global warming.
REGIONAL SPECIALIZATION AND INDUSTRIAL CONCENTRATION IN THAILAND, 1996-2005 Pansuwan, Apisek
Indonesian Journal of Geography Vol 41, No 1 (2009): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

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This paper provides a descriptive analysis of the changes in the industrial and spatial concentration that occurred in Thailand from 1996 to 2005. Based on the data from the Department of Industrial Work of the Ministry of Industry and using the Hirschman-Herfindahl index of concentration, the geographical concentration of industries in the study regions was measured. The Hirschman-Herfindahl index has the useful property of being decomposable into sources of changes in the concentration. Moreover, location quotient was also used to measure the regional specialization of the manufacturing industries in Thailand. Results of the analysis indicated that from 1996 to 2005, the decrease in the spatial concentration of manufacturing as well as in the regional specialization in manufacturing in Thailand remained stable to a lesser extent. The results have also indicated that most factories continue to be concentrated in Bangkok and its neighboring areas. It can therefore be best argued that in the case of Thailand, the effect of its trade liberalization policy has been more powerful than its industrial decentralization policy. 
ANALYSIS OF SOLID WASTE MANAGEMENT IN KOSOFE LOCAL GOVERNMENT AREA OF LAGOS STATE Ogundele, Fatai Olakunle
Indonesian Journal of Geography Vol 42, No 1 (2010): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

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Solid waste is a significant and growing problem in many urban areas ofthe Developing world. Current systems of waste management in most developingcountry cities are very rudimentary at best and are grossly inefficient and effective.Uncontrolled landfill disposal of solid waste is a pervasive problem which causes arange of external costs, including human health hazards. This research analyzesthe solid waste management and its problems in Lagos. The research makes use ofboth structured questionnaire survey to the state of solid waste managementactivities as well as the challenges while published data from Lagos state wastemanagement Agency as well as other published documents were used tosupplement the primary data sources . It is concluded that the most fundamentalrequirement is an integrated regulatory framework and supporting institutions.Once this framework is established then the problems of waste management will bereduced to the minimal level.
APPLICATION OF US-SCS CURVE NUMBER METHOD AND GIS FOR DETERMINING SUITABLE LAND COVER OF SMALL WATERSHED Widiyati, Christanti Nana; ., Sudibyakto
Indonesian Journal of Geography Vol 42, No 1 (2010): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

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This study aims to reveal the appropriate land cover which can reduce runoffusing US-SCS Curve Number method with GIS. Four land cover scenarios aredeveloped to reveal which one of existing land cover types is appropriate for thearea. To make a validation of the application US-SCS Curve Number Method,calculating observational run-off is required. Statistical analysis is than used totest those two run-off data. The result of this study shows that actual run-off depthis 2143, 0 mm and peak discharge is 91, 76 m3/s. The result also reveals that forestcoverage can reduce dramatically surface run-off until 48, 38 percent. Potatoincreases surface run-off 1, 59 percent, on the contrary, applying cacica papayacan reduce surface run-off 24, 6 percent. Scenario 4 is developed based on theresult of the previous scenario on run-off yield. Run-off yield result from scenario 4is 1690, 40 mm (decrease 21, 14 percent from actual run-off). Statistical analysisshows that there is no difference between observed run-off depth and estimatedrun-off depth in the level of significance 5 %.

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