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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.
Arjuna Subject : -
Articles 1,205 Documents
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Potential Landuse and Food Production in Watershed Progo Ritohardoyo, Su
Forum Geografi Vol 12, No 1 (1998)
Publisher : Forum Geografi

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Abstract

This paper is an outcome of research concerning spatial differences in forms and coverage of land use in the Progo River Basin. At present the watershed is facing the problem of land use changes from agricultural to non-agriultural ones, leading to the situation of decreasing staple foods. This research is aimed at studying regional variation in the potentials of the research area of the production of staple foods according toland use forms and coverage. Informastion on land use forms and coverage are obtained from the statistical record issued by the Statistical Office of Central Java province and Yogyakarta Speial Provine. As the productivity data on every land use forms are not readily available, the assement on the regional potential is executed on the basis of land use intensity and its apability to produce staple foods. The research reveals that the greatest portion (59 %) of lands in 54 subdistrict in the watershed are highly potential for staple foods production and the rest (41 %) are not potential to moderately potential for staple foods production purpose. The potential for staple foods production in the upper part of the Progo river basin are higher than that in lower part ones. The presence on irrigated land is not always highly potential for staple food production. Although the availability of irrigation water is strongly decisive factor for food prodution (r = 0.661 significant at 99.99 percent), but the presence of built up areas are strongly dictated the potential for food production (r = -0,787 significant at 99.99 percent). The research further shows that the higher the potential for food production, the higher population size (r = 0.791) significant at 99.99 percent). In general it can be concluded that 1) the potentials for food production are determined by the available of irrigation water and the size of the built areas, and 2) the number of population is dictated by the presence of water and potentials for food production.
Gravitation Model and Spatial Interaction: An Application of Geographical Science for Regional Studies Martha, Sukendra
Forum Geografi Vol 10, No 1 (1996)
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Abstract

Geography as a science describing the inter-relationship between nature and human actions, has a particular applicability values. One of the examples is the use of gravity and  space interaction model approach. This approach applies a formula in which inetraction within space an be known; by multiplying total number of population in two (city) areas and the distances between them. This application is very useful to plan infrastructure, particularly for places having low interaction values.
The Role of Sand and Stone Mining to Increase Family Income in Progo Catchment Ritohardoyo, Su
Forum Geografi Vol 17, No 1 (2003)
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Abstract

The conzequence low income of the farmer household in agricultural sector is the increase in their activities as miner of sand and stone. It means for increasing of their household income. However, how important mining role on the increasing of household income has to be studied in deeply. The factual problem is the base for research aims, with the spesific stress on studying socio-economic characteristic of sand and stone miner, and the contribution of the mining income to household income. This research was carried out in Progo catchment area, Yogyakarta Special Region. Survey method was employed by data collecting from respondents. The respondents are head of households (HH) working as sand and stone miner. Sampling technique was proportionally simple random sampling in which 120 HH was taken as respondents sample. They were representatives of upper part, middle part, and lower part of Progo catchments area. Data on socio-economic structure of the household and household income were collected by mean of structured interview. Data analysis was performed through descriptive technique in which frequencies and cross tabulation varians statistic, and multiple regression analysis were mostly used. The research shows that there are relatively similarities on socio-economic characteristic of sand and stone miners, between at lower part, middle part with upper part of Progo catchments area. This existing of sand and stone mining employs about 70% labours are local miners and 30% labours came from out of the area. Landless farmers who land own less than 500 m2 characterize them. The most of them are male, withlow formal education, and as small family (4 people evey HH). Some of them have been as sand and stone miners for more than 4 years. Generally, they work less than 8 hours for mining every day. This research is also finding that the income of the sand and stone miners are seasonal. The averages of mining income on dry season (Rp 571,880 per month) are higher than on wet season (Rp 365,620 per month). The most important factor affecting income in this activity is the working hours spent. In average, the miner’s monthly income is Rp 468,760 is much higher than minimum level of basic need in Yogyakarta Special Region (Rp 328,750 per month). It means that sand and stone miner as a second occupation besides as a farmer increases household income be capable to satisfy the need of household economy. In general, it can be concluded that the activity has an important role on the increasing of household income.
The Effectiveness of Canopy Trees to Reduce Rainfall Acidity in the Industrial Area at Medan Basuki, Tyas Mutiara
Forum Geografi Vol 14, No 2 (2000)
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Abstract

The term of acid rain is referred to the mean rainfall with a pH less than 5,65. The element of Sox and Nox are the major sources of aid rain. These two elements are oxidized into SO4 and NO3 respectively in the air. Sulfate and Nitrate are water soluble and the primary sources of hydrogen ions in acid precipitation. Rain passing through a tree canopy may lose or gain mineral elements trough some combination of natural process of absorption and leaching. By this process, the canopy may reduce rainfall acidity and negatif effects of the acid rain which will enter into the soil. Due to characteristic differences among tree canopies, a study to evaluate effectiveness of the trees in reducing rainfall acidity was done. In this study, rainfall and troughfall were collected every single rain and the pH measure by portable pH-meter. Based on data collection during 3 months in Medan Industrial Estate, it found that the mean pH of rainfall was 5,15. The highest pH of throughfall was found from Gnetum gnemon, that was 5,70; following by Mimusops elengi, Filicium decipiens, Acacia mangium, and the lowest was Nephelium lappacum. G. Gnemon was able to reduce 11% of rainfall acidity, but N. Lappacum caused 13% increasing rainfall acidity. In this study, the main source of rainfall acidity was hidrogen from sulfate acid (54%), following by chloride acid (30%), and nitrate acid (16%).
Identification and Spatial Pattern of Kao Bay Bathymetry Based on UNCLOS Yulius, Yulius; Salim, H L
Forum Geografi Vol 29, No 1 (2015): Forum Geografi
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Abstract

Kao Bay is located in the province of North Maluku between Regency of North Halmahera and West Halmahera. The study aims are to identify bay criteria according to UNCLOS and bathymetry based on Nautical Chart. The methods used in this study are the identification of the bay area under UNCLOS and spatial analysis using GIS software. The result shows that Kao Bay has a coast line length of 127.7 km, a mouth bay cover line of 11.1 km, total surface area of  964.38  km2, and total surface semi-circular bay cover area of 48.4 km2. The total surface area larger than the area of the semicircle bay cover area. It has been full compliance with the criteria required by UNCLOS. Spatial analysis, found that for the depth of water in Kao Bay can be divided into six classes, these are: (1) 0 – 100 meter with area of 964,38 km2, (2) 100 - 200 meter with area of 667.25 km2, (3) 200 - 300 meter with area of 556.95 km2, (4) 300 - 400 meter with area of 376.89 km2, (5) 400 - 500 meter with area of 202.44 km2, (6) 500 - 600 meter with area of 2.22 km2.
Role of Remote Sensing Data and Geographic Information Systems to Support in Landuse Planning Activity at Urban Area Santoso, Sugiharto Budi
Forum Geografi Vol 12, No 2 (1998)
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Abstract

Land order in an urban area that is not based on complete and reasonable spatial information an cause an unintegrated development program. Therefore, spatial information that can analyze the information to make a decision of land order is greatly needed. To present the most reasonable physical data of the urban can use the data of remote sensing as a main source, because the data an present not only a high temporal resolution, but also a complete object. Along with the advance of computer-based GIS, the data of remote sensing can be integrated with GIS. In addition, the data sharing can be used in various sectors. Thus, both updating and mutual exchanging of data can be done easly.
Geomorphic Hazard Map for Spatial Planning Purposes Taryono, T
Forum Geografi Vol 10, No 2 (1996)
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Abstract

In the planning of spatial lay-out oriented to environmental concept, it requires the information input conneting with the condition of local environment. This condition constitutes the features characteristic of the living space which consist of natural and social environment. One of the natural environment elements, neede to the spatial lay-out planning, is the dynamis geomorphology. The process of the dynami is some times accelerated and increased by natural and anthropogenic factors. The abnormality in both acceleration and the increase will cause a natural disaster, which is based on the landscape approach it is called the geomorphologic hazard. In connection with such event thematic map of geomorphologic hazard describes the disaster susceptibility of an area. The geomorphologic hazard map is an output map whose information is obtainable from thematic map conneting with population, land use, topography, geomorphology, rainfall, hydrological data, and slope classification. Both land use and population maps desccribes the anthropogenic factors. The role of the geomorphologic hazard map, in the planning of spatial lay-out and environmental management, i.e. preventive, represive, rehabilitative, and serves as the basis for interpretation and management of living spere. By putting geomorphologic hazard into map compilation of spatial lay-out (cultural and non cultural area map) a footstep advance is the reached to guarantee human security and their treasures, and human well-being as an integral part of human living prosperity.
Regional Planning Cartography Sukoco, M
Forum Geografi Vol 4, No 2 (1990)
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Abstract

On the development of regions, whatever they are cannot be separated from the planning stage before  the development stage it self. This paper aims to investigate the role of artography, in relation  with the study of regional development, especially in relation with the preparation of map types that are relevant and need for both planning and regional development processes. Planners have agreed that maps are highly neede in the planning process, but much is still debated as to ways of presentation, contents of theme, and suitable scala for planning purposed. There are two groups of maps neede by planners, i.e. status maps that are neede before planning and maps that are neede during the planning process. The selection of how much information needed to be drawn on maps for the aims of regional planning, is a difficult problem to solve and also challenge for us, especially geographers. This paper is only a desription of our contribution of thoughts, not based on any research, but is a compilation from various source/ideas, particularly from cartographer who are experienced in their new field, i.e. “Regional Planning Cartography”.
Behavior and Preparedness to Fire Hazard in High Density Settlements in Bandung Sagala, Saut; Wimbardana, Ramanditya; Pratama, Ferdinand Patrick
Forum Geografi Vol 28, No 1 (2014)
Publisher : Universitas Muhammadiyah Surakarta

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Abstract

Fire is one of the hazards that may affect urban areas with high density settlements. Thus, research on fire mitigation is important to be conducted. This paper examines the behavior and preparedness of occupants in high density settlements towards fire risks in urban area. The case study is located at Kelurahan Sukahaji, Kecamatan Babakan Ciparay, Bandung that has very high density settlement as well as prone to fire hazards. This study assess 232 respondents in the study areas on information related to demography, understanding about fire, behavior and preparedness. The respondents understanding on the types of fire sources are still low. Similarly, the behavior related to the activites using fire are still dangerous because some activities are conducted with other activities which make people less aware of the fire hazards. Nevertheless, their knowledge on how to extinguish fires are quite good. This paper recommends more trainings on knowledge of fire source and behavior to be conducted to occupants living in high density settlements in order to reduce fire disaster risk.
Characteristics of Land Resources as Foundation of Watershed Management in Sub Watershed Merawu, Serayu Harjadi, Beny
Forum Geografi Vol 18, No 2 (2004)
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Abstract

In 2000, the area of DAS critical land in Indonesia is approximately 23,242,881 ha which consists of forest area 8,136,646 ha (35%) and non forest area 15,106,234 ha (65%). In the contrary, the fact shows that in 1989/ 1990 (the beginning of ‘Pelita’/ the five years development planning owned by the government), the area of DAS critical land in Indonesia was 13,180,000 ha only that consists of forest area 5,910,000 ha and non forest area 7,270,000 ha. The cause and its location of negative improvement of the above DAS has not been predited yet. The one of the causes is the weakness of information system on very DAS management system in the aspect of biophysical, soial, eonomical, and cultural. Therefore, it needs the improvement of DAS management which is supported by the result of research and development. The purpose of this research is to get the potency information and the possibility of sensitivity of the land resources in the frame of DAS management with biophisical land as the parameter. Sub DAS of Merawu (21,860 Ha) isas one of the parts of ‘bulu’ DAS Serayu with stream flow minimum 0,81 m3/second and maximum 108 m3/second. The sub DAS of Merawu as the part of ‘bulu’ Serayu has the type of climate A and B with annual rainfall approximatelly >2,000 mm and it can support everything in the stream flow of in order to prevent the flood. This ondition is caused by the permanent vegetation such as forest, underbrsuh or srub, tea garden, as well as multi – plantgarden that has around 40% happen in the ineptisol land, although precipitous slope and very precipitous (>25%). The technique of land conversation is good enough in its development, mainly in the dry section of the field by using ‘teras gundul’ and ‘teras bangku’ the society near Sub DAS of Merawu is densely populated, its is around 517 up to 827 persons/ square with their main profession as farmer and their income is around Rp 2.000.000 per year. Bya analysing the above DAS management, it an show that sub DAS of Merawu has the potency of water both for internal and external DAS consuming. The potency of using the land for farimng one season in length (class II, III, and IV) consists of around 50,8%. The development multy plant garden (25% area of DAS) is as the type of potential farming effort because of the diversity of both the result and time; besides it is also as the form of protection toward the effetive land. The possibility of sensitivity is too wide land which is susceptible toward the slide (land slide), mainly in the middle part of the DAS. The live dependee of land which strong enough is as the threat toward the future resoures conservation.

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