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Jurnal Geografi : Media Informasi Pengembangan dan Profesi Kegeografian
Published by Universitas Negeri Semarang
ISSN : 25493078     EISSN : 25493094     DOI : -
Core Subject : Science,
Earth & Planetary Sciences
Jurnal Geografi : Media Informasi Pengembangan dan Profesi Kegeografian welcomes high-quality, original and well-written manuscripts on any of the following topics: 1. Geomorphology 2. Climatology 3. Biogeography 4. Soils Geography 5. Population Geography 6. Behavioral Geography 7. Economic Geography 8. Political Geography 9. Historical Geography 10. Geographic Information Systems 11. Cartography 12. Quantification Methods in Geography 13. Remote Sensing 14. Regional development and planning 15. Disaster
Arjuna Subject : -
Articles 555 Documents
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HIGH RISE BUILDING IDENTIFICATION FROM SPOT 6 MULTISPECTRAL AND DIGITAL SURFACE MODEL (DSM) USING OBJECT BASED IMAGE ANALYSIS Zylshal, Zylshal; Nugroho, Jalu Tejo; Prasasti, Indah
Jurnal Geografi : Media Informasi Pengembangan dan Profesi Kegeografian Vol 14, No 2 (2017): July 2017
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jg.v14i2.11583

Abstract

This study focuses on one aspect of urban geometry called urban canyon. Urban canyon defined by a relatively narrow street lined by tall buildings. The initial step to extract the urban canyon is to identify the tall buildings. This study aims to discuss the potential use of the SPOT-6 multispectral data and its digital surface model (DSM), using object-based image analysis methods and terrain analysis, to identify the high-rise buildings in some part of Jakarta, Indonesia. Using slope and elevation percentile from the DSM as well as the spectral information of the SPOT-6 image, we then processed using the Object Image Analysis (OBIA) method and decision tree algorithm (crisp classification), we are able to obtained the identification rate of 78% with mean location accuracy of 30 meter (5 pixels).
OBIA CLASSIFICATION AND BUILT-UP LAND INDICES NDBI FOR ESTIMASTION OF SETTLEMENT DENSITY IN PONTIANAK CITY Fariz, Trida Ridho
Jurnal Geografi : Media Informasi Pengembangan dan Profesi Kegeografian Vol 14, No 2 (2017): July 2017
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jg.v14i2.11518

Abstract

Settlement density data is very important because the density of settlements is one of the main indicators of slum settlement in Pontianak City. The one of way to obtain settlement density information is to use remote sensing data like satellite imagery or aerial photo. This is a problem considering the budget and more time to get high resolution satellite imagery and extract the information we want.The one method for the detection of settlements using Landsat 8 satellite imagary is the built-up land indices NDBI (Normalized Difference Build-up Index). Objective of this research is build spatial model of settlement density in Pontianak City using built-up land indices NDBI (Normalized Difference Build-up Index), moreover combining with OBIA Classification (Object Base Image Analysis).The results of this research indicate that built-up land indices NDBI has a value of determination (R2) is high that is equal to 0.628 and has a strong correlation of 0.792 to the density of settlements calculated from aerial photo. The spatial model of settlement density estimation has a R2 of 0.75 and a RMSE value of 5.10
INVESTIGATING THE EFFECT OF CONSERVATION TECHNIQUES ON THE LAND DEGRADATION OF TROPICAL CATCHMENT PRONE TO LANDSLIDE Christanto, Nugroho; Sartohadi, Junun; Setiawan, Muhammad Anggri; Hadi, M Pramono; Jetten, Victor G; Shrestha, Druba Phika
Jurnal Geografi : Media Informasi Pengembangan dan Profesi Kegeografian Vol 14, No 2 (2017): July 2017
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jg.v14i2.11513

Abstract

Land degradation in Serayu watershed is a major concern in central Java and in Indonesia. As part of a broader effort to develop a land degradation assessment tool in tropical area, this study implemented a process-based watershed hydrology to assess the effect of conservation technique upon land degradation by using PCRaster. STARWARS was used to assess the watershed hydrology in the area based on their land use/ land cover, soil, and slope profiles. The results from STARWARS were used as inputs for the PROBSTAB model to simulate the slope stability in the area. DEM scenario were used, they are with terraces and without terraces.The models show that the landuse practice in the study area work like two edges of sword. The promoting of bench terrace can be reducing the risk of soil erosion but in the other hands it increases in the risk of landslide. From the slope-stability modeling, we can see that the terrace increases the pore-water pressure significantly which lead to the ideal conditions for the failures. The extremely high intensity rainfall, in the other hands, may build a sharp increase of pore-water pressure. The increasing probability of failure might cause the soil erosion even worse. Therefore, in order to make the terrace practice is effective to control the land degradation process; the terrace has to be well maintained.
PEMANFAATAN TEKNOLOGI PENGINDERAAN JAUH UNTUK DETEKSI KEKERINGAN PERTANIAN MENGGUNAKAN METODE NORMALIZED DIFFERENCE DROUGHT INDEX DI KABUPATEN KENDAL Sukmono, Abdi; Rahman, Fadli; Yuwono, Bambang Darmo
Jurnal Geografi : Media Informasi Pengembangan dan Profesi Kegeografian Vol 14, No 2 (2017): July 2017
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jg.v14i2.11521

Abstract

Drought of agricultural land is one of the most frequent disasters in Indonesia. This disaster greatly affects food security. Kendal Regency is one of the areas in Indonesia that often experience drought of agricultural land. In the year 2015 in Kendal regency there are 1055 Ha paddy field was crop failure. The threat of drought on agricultural land can be minimized if the monitoring of drought potential in a region can be known.One way that can be used for spatial drought monitoring is to use applications from remote sensing based on a particular algorithm. In the research, Normalized Difference Drought Index (NDDI) algorithm is used to distribution and extent of agricultural drought in Kendal District by 2015 using Landsat 8 satellite imagery. NDDI is the ratio between Normalized Difference Vegetation Index (NDVI) and Normalized Difference Water Index (NDWI).The results indicate agricultural drought using NDDI method in July 2015 with normal drought area 6980,362 ha, mild drought 13364,155 ha, moderate drought 682,847 ha and dry drought 281,81 ha. Validation results show the accuracy of the NDDI method is 82%. 
POHON AREN SEBAGAI TANAMAN FUNGSI KONSERVASI Mulyanie, Erni; Romdani, Andhy
Jurnal Geografi : Media Informasi Pengembangan dan Profesi Kegeografian Vol 14, No 2 (2017): July 2017
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jg.v14i2.11514

Abstract

Cimanggu is the largest villages in Kecamatan Langkaplancar and still has many palm trees. These potentials need to be conserved to ensure environmental sustainability and the welfare of surrounding communities. Efforts to maintain its sustainability is to sharing knowledge and understanding of the importance of palm trees existence as a erosion or landslide conservation plant to be developed or cultivated in earnest by various parties. The purpose of this research is to know the benefits factors of sugar palm tree (Arenga Pinnata) as a conservation plant function in the Cimanggu Village Langkaplancar Pangandaran District. The research method is quantitative descriptive research. In addition, the authors also use the data survey because to generate quantitative data, also illustrates the sample studied. The results showed that the palm trees (arenga pinnata) have benefits as a plant conservation in the Cimanggu Village Langkaplancar Pangandaran District. Cimanggu village is eligible to grow palm trees that able to prevent floods and landslides. Besides, palm trees that can grow well on the cliffs will be very good as erosion prevention or landslides.
ARAHAN KOMODITAS UNGGULAN PERIKANAN TAMBAK DI PESISIR KABUPATEN KENDAL (EVALUASI KESESUAIAN LAHAN BUDIDAYA PERIKANAN TAMBAK) Sriyanto, Sriyanto; Sanjoto, Tjaturahono Budi
Jurnal Geografi : Media Informasi Pengembangan dan Profesi Kegeografian Vol 14, No 2 (2017): July 2017
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jg.v14i2.11522

Abstract

Many factors are taken into consideration when it will breed pond fishery. Location clearance, soil ph, soil texture, land slope, distance to sea, distance to river, rainfall, and axisibility are some of the necessary equilibrium. The right conditions with these parameters will provide maximum results for fish farmers, otherwise if these parameters are not met it will affect the results that will be obtained. Kendal Regency is one of the regencies in Central Java with coastal area. There are 7 districts in Kendal Regency whose territory is on the coast, Kaliwungu, Patebon, Brangsong, Rowosari, Kangkung, Kendal, and Cepiring. The purpose of this study is to assess the suitability class of ponds in coastal areas of Kendal. The method used is the scoring analysis of the parameters of the location of a good pond, among others, land slope, soil texture, soil ph. Based on the parameters used in the evaluation of land suitability, in the coastal region of Kendal Regency can be classified into three classes, namely very appropriate (S1) covering the District Kangkung and District Rowosari. The corresponding class (S2), the region's distribution in this class is almost in most coastal areas of Kendal Regency. In the quite appropriate class (S3) is the class of land that if it will be cultivated ponds need special treatment is located in Kendal and Kaliwungu District because most of the land for settlement and moor. To achieve the target of pond production, it needs to be cultivated in a very suitable class (S1). This is considering almost no obstacles in cultivating ponds.
LAND COVER CHANGES STUDY OF UPSTREAM COKROYASAN WATERSHED ON MAXIMUM RETENTION Hanafi, Fahrudin; Budi Nur Sidiq, Wahid Aksin
Jurnal Geografi : Media Informasi Pengembangan dan Profesi Kegeografian Vol 14, No 2 (2017): July 2017
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jg.v14i2.11515

Abstract

This research takes location on upstream of Cokroyasan watershed, especially on Bandung weir catchment on Purworejo and Wonosobo District. Research objective is knowing maximum retention changes which represented by upstream Cokroyasan watershed curve number, related to land cover data series, soil type, rain, and peak flow (Qp). Research data quality controlled with data survey and overland flow data observed. Thus the relationship of particular land cover and watershed responses in generating peak flow can be determined.The land covers determine using multispectral classification of Landsat which detailed with manual interpretation and Google Earth image. Sampling selection defines by stratified random sampling technique of the smallest unit of land form. Effective rain determines by consistency test of rainfall data, frequency analysis, survey data and curve number composites. The effective rainfall generate using SCS model (Soil Conservation Service) which influenced by design rainfall, soil type, texture, and land cover.The results showed that within 15 years, the land cover of Bandung weir catchment change significantly. Especially plantation was reduced by 56% or 40.76 km2 while the settlements increased 412% to 64.20 Km2, and other land cover changes not significant (2% <). The analysis showed the peak flow in the upstream of Cokroyasan watershed changes on different return period. Although the different can only see on a more than two years return period. This means there was an increase of peak flow (discharge), as a result of maximum retention DAS dropped from 16- 18.29 m3/ s.The conclusion of this research indicate that land cover changes that occur within 15 years, influence on Curve Number changes, maximum retention, effective precipitation, and peak flow of upstream Cokroyasan watershed.
KLASIFIKASI BENTUKLAHAN SECARA OTOMATIS MENGGUNAKAN TOPOGRAPHIC POSITION INDEX Putro, Sutanto Trijuni; Fitria, Nucifera
Jurnal Geografi : Media Informasi Pengembangan dan Profesi Kegeografian Vol 14, No 2 (2017): July 2017
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jg.v14i2.11523

Abstract

Landform is an essential aspect for environmental and disaster studies. Automated landform classification has been developed due to the importance role of landrom for many studies. Automated landform classification can be applied for general purposes.TPI (Topographic Position Index) is one of automated landform classification method. TPI measures the difference between center elevation and mean elevation in its surroundings within certain radius. This study used SRTM data with 90 meters resolution and ASTER GDEM data with 30 meters resolution for the south part of Yogyakarta. Data processing is conducted by using SAGA GIS. The research documented here aims to clarify how TPI support the landform classification thus for practical use can be utilized effectively for analysis any aspect related to landform classification.Generally, automated landform classification for two datas results the same spatial pattern. Study area is mostly classified as plains. But feature number of landform in ASTER GDEM data is larger than STRM data. Because ASTER GDEM data has higher spatial resolution so that the result is more detail. Based on Tobler`s Law, ASTER GDEM work best for 1:50.000 scale, while SRTM fit for 1:180.000 scale.
EVALUASI KESESUAIAN LAHAN UNTUK TANAMAN KELAPA SAWIT DI KECAMATAN MARABAHAN KABUPATEN BARITO KUALA Arisanty, Deasy; Syarifuddin1, Syarifuddin1
Jurnal Geografi : Media Informasi Pengembangan dan Profesi Kegeografian Vol 14, No 2 (2017): July 2017
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jg.v14i2.11516

Abstract

Barito Kuala District experienced a land use change from swamp forests and rice fields to palm oil fields. This study aims to evaluate the land suitability for oil palm plantation in Marabahan sub-district, Barito Kuala District. Samples were obtained on each map of the land unit. The number of land units is 32 units of land. Land unit map is obtained from overlay landform, land use, land, and slope map. Data were analyzed by matching method. The land suitability class for oil palm plantations is somewhat suitable (S3) with a drainage and unconditionally constrained (N1) boundary with drainage barrier. The area with a suitable land suitability (S3) is 138.7 km2. The area of land suitability of unconditional land (N1) is 91.0 km2. Drainage becomes a barrier because the research area is a swamp area that is always inundated, especially for peat antiklinal basin land form.
DETERMINATION THE OCCURANCE OF MERCURY IN SOIL IN THE MINING AREA OF ROMANG ISLAND Hendarto, Rudhy
Jurnal Geografi : Media Informasi Pengembangan dan Profesi Kegeografian Vol 14, No 2 (2017): July 2017
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jg.v14i2.11524

Abstract

The occurance of mercury in the environment whether on land, water and air can occur because of human activities or naturally existed. In gold mining activities, the source of mercury occurrence can be from the mining activity or being naturally exist in the land and water. Romang Island is one of the islands in the Maluku Islands. In the Romang Island, currently being done the process of exploring the potential of mining materials. Metallic minerals to be explore on Romang Island included Gold (Au) and associated metal minerals such as Silver (Ag), Copper (Cu), Zinc (Zn), Lead (Pb) and Manganese mineral (Mn ). This study aims to determine the occurrence of mercury in the soil in Romang Island. This research is very important to understand whether the mercury in Romang Island is natural existed or available due to the mining activities. In order to determine the mercury in the soil, laboratory test was conducted. Soil samples were taken using non-probability sampling method: accidental sampling and purposive sampling. Selection of this sampling method is done with consideration of limited road accessibility on Romang island and security. From the results of laboratory tests, we found that mercury in Romang Island is naturally existed. The value range from 0.223 to 1.627 ppm. The natural existence of mercury in the Romang Island is quite possible given the geological conditions on this area.

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