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Forum Geografi
Published by Universitas Muhammadiyah Surakarta
ISSN : 08520682     EISSN : 24603945     DOI : -
Core Subject : Science,
Earth & Planetary Sciences
Forum Geografi, Indonesian Journal of Spatial and Regional Analysis (For. Geo) is an open access, peer-reviewed journal that will consider any original scientific article for expanding the field of geography. The journal publishes articles in both physical and human geography specialties of interest to spatial analysis and regional analysis in (but not limited) Indonesia by applying GIS and/or remote sensing techniques.
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Articles 20 Documents
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Search results for , issue "Vol 21, No 2 (2007): December 2007" : 20 Documents clear
Sistem Akuifer dan Potensi Airtanah Daerah Aliran Sungai (DAS) Opak Purnama, Setyawan; Suyono, Suyono; Sulaswono, Budi
Forum Geografi Vol 21, No 2 (2007): December 2007
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v21i2.2356

Abstract

Opak River Basin is an area with high concentration of settlement. Generally, the settlement use groundwater as a water source. Variation of groundwater condition cause differentiation of water usage in some regions. There are two objectives of this research. First, to determine aquifer system in the research area and second, to calculate the groundwater potential in each aquifer system. To achieve these objectives, aquifer system is determined base on its geology and geomorphology, whereas groundwater potency is calculated by static and dynamic approach. As a result, show that the aquifer system in Opak River Basin can be distinguished into seven aquifer system. There are The Upper Merapi Aquifer System, The Middle Merapi Aquifer System, The Lower Merapi Aquifer System, Baturagung Range Aquifer System, The Aquifer System of Baturagung Range Foot Slope, Sentolo Hill Aquifer System and Sanddune Aquifer System. Among the seventh aquifer system, The Middle Merapi Aquifer System, The Lower Merapi Aquifer System and The Sanddune Aquifer System have high productivity. Sentolo Hill Aquifer System and The Aquifer System of Baturagung Range Foot Slope Aquifer have low productivity, whereas The Baturagung Range is categorized as non akuifer.
Kajian Peran Waduk Sebagai Pengendali Kualitas Air Secara Alami Supangat, Agung B.; Paimin, Paimin
Forum Geografi Vol 21, No 2 (2007): December 2007
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v21i2.2357

Abstract

In Indonesia it was identified that there were much of polluted stream flow which cause improper consumed water. One of the rivers which has low of water qualities is Citarum River, West Java. However, along the Citarum river, there were built three reservoir dams (Saguling, Cirata and Jatiluhur) that can control the condition of river water regime. Research was conducted in Citarum watershed to determine the role of those reservoirs on water quality control. Seven stations along the river were selected as observation posts of water samples. Based on the observation results it was indicated that water pollutants within Citarum river was very high. However, those pollutants could be purified or reduced by those reservoirs, hence water discharge from the reservoirs has better quality. In the future, deposition of those pollutants within the dam may has negative environment impact. Therefore, to sustain that function of the dam, comprehensive efforts on reducing pollutants from the catchment area is urgently required.
ANALISIS PROSES DEGRADASI LAHAN DAN DAMPAKNYA TERHADAP PRODUKTIFITAS LAHAN PERTANIAN DI KABUPATEN KLATEN Sigit, Agus Anggoro; Suharjo, Suharjo
Forum Geografi Vol 21, No 2 (2007): December 2007
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v21i2.10174

Abstract

The aim of this research are : (1) identity the process of land degradation happened in the study area; (2) evaluation of agriculture land productivity with land degradation process in the study area; (3) analysis impact process of land degradation to agriculture land productivity in the study area. This research using survey method and spatial analysis by application of Geographical Information Sistem (GIS).According to data analysis, obtained by the following research result are: (1). Have been happened by process of land degradation in regional part of the study area which tend to degrade quality of land resources by type natural process influence (subsidence, slide, crack) and anthropogenic process (making of brick). Subsidence happened in Gantiwarno; crack in Gantiwarno and Bayat; slide in Bayat. Making o brick a lot of happened in Jogonalan, Ngawen, Jatinom, Karanganom and Ceper; (2). Region with compatibility ?harmony? in the study area take of area for the width of 28930,10 Ha or 44,13 % (regional half almost Klaten District of productivity of its rice crop as according to its land suitability); ?harmony (-)? taking of area for the width of 2973,15 Ha or4,53 % (there are partial; a little region in Klaten District which manifestly do not good for effort to agriculture of rice crop, specially the paddy); ?not harmony (+)? taking of area for the which of 7929,25 Ha or 12,10 % (there are some region in Klaten District bad its of land condition, but its productivity is goodness); ?not harmony? taking of area for the which of 25724,10 Ha or 39,24 % (there are region with big enough area in Klaten District which to make a effort of agriculture of its rice crop not yet been done in an optimal fashion). Region with compatibility ?not harmony? need deeper attention of its land management; (3). Land degradation of most be happened to regions with compatibility status ?not harmony?. Although is not be absolute in character, but this matter represent and existence indication of s possibility of influence of land degradation to lowering mount land productivity to rice crop in the study area. Land degradation at region of have compatibility status  ?harmony? as in Gantiwarno (in this time) reality not yet affect its influence to level of land productivity for the rice crop.
Analisis Proses Degradasi Lahan dan Dampaknya Terhadap Produktifitas Lahan Pertanian di Kabupaten Klaten Agus Anggoro Sigit; Suharjo Suharjo
Forum Geografi Vol 21, No 2 (2007): December 2007
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v21i2.10174

Abstract

The aim of this research are : (1) identity the process of land degradation happened in the study area; (2) evaluation of agriculture land productivity with land degradation process in the study area; (3) analysis impact process of land degradation to agriculture land productivity in the study area. This research using survey method and spatial analysis by application of Geographical Information Sistem (GIS).According to data analysis, obtained by the following research result are: (1). Have been happened by process of land degradation in regional part of the study area which tend to degrade quality of land resources by type natural process influence (subsidence, slide, crack) and anthropogenic process (making of brick). Subsidence happened in Gantiwarno; crack in Gantiwarno and Bayat; slide in Bayat. Making o brick a lot of happened in Jogonalan, Ngawen, Jatinom, Karanganom and Ceper; (2). Region with compatibility ‘harmony’ in the study area take of area for the width of 28930,10 Ha or 44,13 % (regional half almost Klaten District of productivity of its rice crop as according to its land suitability); ‘harmony (-)’ taking of area for the width of 2973,15 Ha or4,53 % (there are partial; a little region in Klaten District which manifestly do not good for effort to agriculture of rice crop, specially the paddy); ‘not harmony (+)’ taking of area for the which of 7929,25 Ha or 12,10 % (there are some region in Klaten District bad its of land condition, but its productivity is goodness); ‘not harmony’ taking of area for the which of 25724,10 Ha or 39,24 % (there are region with big enough area in Klaten District which to make a effort of agriculture of its rice crop not yet been done in an optimal fashion). Region with compatibility ‘not harmony’ need deeper attention of its land management; (3). Land degradation of most be happened to regions with compatibility status ‘not harmony’. Although is not be absolute in character, but this matter represent and existence indication of s possibility of influence of land degradation to lowering mount land productivity to rice crop in the study area. Land degradation at region of have compatibility status  ‘harmony’ as in Gantiwarno (in this time) reality not yet affect its influence to level of land productivity for the rice crop.
Sistem Akuifer dan Potensi Airtanah Daerah Aliran Sungai (DAS) Opak Setyawan Purnama; Suyono Suyono; Budi Sulaswono
Forum Geografi Vol 21, No 2 (2007): December 2007
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v21i2.2356

Abstract

Opak River Basin is an area with high concentration of settlement. Generally, the settlement use groundwater as a water source. Variation of groundwater condition cause differentiation of water usage in some regions. There are two objectives of this research. First, to determine aquifer system in the research area and second, to calculate the groundwater potential in each aquifer system. To achieve these objectives, aquifer system is determined base on its geology and geomorphology, whereas groundwater potency is calculated by static and dynamic approach. As a result, show that the aquifer system in Opak River Basin can be distinguished into seven aquifer system. There are The Upper Merapi Aquifer System, The Middle Merapi Aquifer System, The Lower Merapi Aquifer System, Baturagung Range Aquifer System, The Aquifer System of Baturagung Range Foot Slope, Sentolo Hill Aquifer System and Sanddune Aquifer System. Among the seventh aquifer system, The Middle Merapi Aquifer System, The Lower Merapi Aquifer System and The Sanddune Aquifer System have high productivity. Sentolo Hill Aquifer System and The Aquifer System of Baturagung Range Foot Slope Aquifer have low productivity, whereas The Baturagung Range is categorized as non akuifer.
Kajian Peran Waduk Sebagai Pengendali Kualitas Air Secara Alami Agung B. Supangat; Paimin Paimin
Forum Geografi Vol 21, No 2 (2007): December 2007
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v21i2.2357

Abstract

In Indonesia it was identified that there were much of polluted stream flow which cause improper consumed water. One of the rivers which has low of water qualities is Citarum River, West Java. However, along the Citarum river, there were built three reservoir dams (Saguling, Cirata and Jatiluhur) that can control the condition of river water regime. Research was conducted in Citarum watershed to determine the role of those reservoirs on water quality control. Seven stations along the river were selected as observation posts of water samples. Based on the observation results it was indicated that water pollutants within Citarum river was very high. However, those pollutants could be purified or reduced by those reservoirs, hence water discharge from the reservoirs has better quality. In the future, deposition of those pollutants within the dam may has negative environment impact. Therefore, to sustain that function of the dam, comprehensive efforts on reducing pollutants from the catchment area is urgently required.
Residential Mobility di Pinggiran Kota Semarang Jawa Tengah (Studi Kasus Kaum Miskin Kota di Kota Semarang) Moh. Gamal Rindarjono
Forum Geografi Vol 21, No 2 (2007): December 2007
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v21i2.2358

Abstract

This research was aimed in analyzing and examining the development of slum residential in Semarang, including its center of the city urban, urban-fringe and sub-urban area. Within the development of the slum residential due to mobility of the urban poor, the phenomenon in the term of residential mobility occurred. Using both qualitative and quantitative methods, this research was applying distant-interpretation data in examining slum residential phenomenon and terrestrial data in analyzing both social and cultural issues related to development of slum residential. This research resulting a residential mobility model throughout areas of research, especially sub-urban including the Chinese cemetery area; the new migrant was the urbanist namely the bridge headers group, consists of tramp and hobos whom should be concerned more. Though they just have settled in short-period within the area, their income was categorized financially settled. They owned their own home not as the renter and even, built housing for their subordinates amounted 7-15 families in a complex of residential. Stability of the income was also supported by resident-owning whereas selecting its location based on the land-availability which initially settled the location illegally among the graves. This location was selected since its less-maintained condition by neither their descendant nor cemetery officer which then densely covered by bushes. Availability of the sufficient land leads them to build their residential which also used as the scrap collection space. During the times, their number was increased referred to their raising income. Legalizing their residential was the next step for their existence and sustainability by purchasing or renting the land. Eventually this bridge header was earning a stable income, owning their own home, and locating their residential in the sub-urban area furthermore but unfortunately less-supported by a highly established life style but an early category one . These were indicated by several factors, either employer or subordinate tramps which cooking foods altogether, unfashionably worn, and behavior of their youngster of asking consideration and advice to the consolidator and status seeker.
Analisis Spasial Ekologikal Sumberdaya Lahan di Provinsi Daerah Istimewa Yogyakarta Suratman Worosuprodjo
Forum Geografi Vol 21, No 2 (2007): December 2007
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v21i2.2354

Abstract

Land resources is an important geographical aspect related to landuse allocation for human living.  The aim of this research is to study the spatial ecological analysis for land resources in related to landuse type in the Province ofYogyakarta Special Region, the approach used in the research is landscape analysis based on geomorphological mapping, topographic map at scale 1:100000. Land resources potential in the study area can be classified based on landscape such as volcanic landscape, fluvial landscape, marine and eolion landscape, karst landscape (Gunung Sewu), structural - denudational landscape (Balur Agung). Landuse can be alocated based on the landscape condition, and limitation. Land limitation such as slope steepness, soils, natural hazard, water resources in each landscape can be used as detrminant factors in the landuse plan.
Penggunaan Sistem Informasi Geografis untuk Menghitung Dimensi Lumpur Panas di Porong, Sidoarjo Gatot H. Pramono; Seno P. Sardjono
Forum Geografi Vol 21, No 2 (2007): December 2007
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v21i2.2359

Abstract

The hot mud extrusion in Porong, Sidoarjo since May 29, 2006 has impacted many aspects including social, culture, economy and transportation. Several weeks later, a collaborative team was formed to investigate the factors controlling the hot mud extrusions. One important aspect is concerning the mud dimensions such as its perimeter, area, volume and discharge. Bakosurtanal was assigned to carry out this task. Field surveys to acquire the mud heights were conducted twice within one month interval. Geographic Information System (GIS) using 3 dimentional approach was employed to compute the mud dimesions. One of the results show that the mud discharge is about 50.000 m3/day. This value was later commonly used to refer the magnitude of the hot mud.
Characterizing the Urban Growth from 1975 to 2003 of Hanoi City Using Remote Sensing and a Spatial Metric Pham Minh Hai; Yasushi Yamaguchi
Forum Geografi Vol 21, No 2 (2007): December 2007
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v21i2.2355

Abstract

This study explores an approach of combining remote sensing and a spatial metric to characterize land use change in Hanoi, Vietnam. The work is based on the land cover information of 4 different times derived from Landsat and ASTER data from 1975 to 2003. This study adopted the spatial metrics; the percentage of like adjacency (PLADJ), which calculates the number of like adjacencies involving the focal class, divided by the focal number of cell adjacencies involving the focal class, multiplied by 100 to convert to a percentage. The result successfully showed proportions of the fragmented and the aggregated areas in urbanization for each development time. During the rapid urbanization periods in 1975 – 1984 and 1984 – 1992, a large proportion of the interior non developed and aggregated non developed was converted to developed landscape, whereas fragmented non developed to developed markedly happened in 2001 – 2003. The study provided intuitive description and separation of three urbanization patterns such as infill, expansion, and outlying. Quantitative assessment revealed that the proportion of the expansion and infill steadily increased, whereas the proportion of the outlying decreased in past 30 years. The combined approach using remote sensing and a spatial metric is an effective method to improve understanding of urbanization patterns and to provide visualization of spatial – temporal change due to urbanization.

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