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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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Identification of Environment Chase in Surround of Sermo Reservoir; and the Influence Possibility for Function and at the Age of Reservoi Sudarmadji Sudarmadji
Forum Geografi Vol 16, No 1 (2002)
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v16i1.410

Abstract

Sermo reservoir is the only one belongs to Yogyakarta Special Province; it is relatively a new reservoir with the area of 1.9 kilometer square and its capacity of 25 million cubic meter: It started to operate since 1996 as flood control, irigation, water supply, tourism and fishery purposes. As a reservoir it could be considered to be a manmade lake, as its condition nearly similar to a lake. Since it operated (even during construction period) there were some significant environmental changes within the reservoir and in the area around the reservoir due to the human activities. These changes could threat the sustainability of the reservoir itselfThis research aims to identiflr the human activities living around the reservoir and visitors coming to the area, and to evaluate the potensial of the activities to produce wastes which is discharging in into the reservoir; which may threat the sustainability of the reservoir: The observatorium in the field has been conducted in the area of the reservoir and its sorrounding. I t was firund fiom the observation that activities o f fishery using net (karamba), tourism altogether with its facilities, land use around the reservoir for agriculture purposes, mining of class C ore, have given a lot of contribution to wastes (liquid and solids) and sediments into the reservoir: Those activities may cause water quality of the reservoir lo decrease as well as reducing the reservoir depth. Those situation was observed in the northern and north western parts of the reservoir Water quality degradation of the reservoir may threat reservoir as source of domestic water supply, while the sedimentation may reduce the life time of the reservoir The fishery and tourism activities was estimated as a main cause of water quality degradation, beside agricultural and domestic wastes originated from sattlement area around the reservoir: Sediments coming into the reservoir are derived fiom transported and movement of materials from land slide occuring around the reservoir; due to distruction of land in constructing the relatively new ring-road close to the shore line of the reservoir: Of course, the sediment is also coming from rivers enteringdie reservoir. Sermo reservoir is a relatively young reservoir; the early observation of environmental changes of the reservoir could hopely be used as indicator to study ecological changes of the area within and around of the reservoir; and could be used as a comparison to other reservoirs, as well as basic environmental management of the reservoir and its surrounding.
Faktor-Faktor yang Berpengaruh terhadap Pengambilan Keputusan Wanita Migran Bermigrasi ke Kota Malang B Budijanto
Forum Geografi Vol 25, No 2 (2011): December 2011
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v25i2.5039

Abstract

The low family income, lack of job vacancy other than farmland, the narrow square of land possession, and the high level of household load encourage women deciding to migrate to Malang as an effort to support their household economic welfare improvement. The aim of this research is to find and reveal any condition which causes migrant women household to decide migrating to Malang. The research result shows that demography variables (age, marriage status, and the amount of household load) have significant effect toward migrant women's decision making to migrate to Malang. Also, social-economic variable (migrant women education, household income, farmland square, and type of the job) affects migrant women's decision making to migrate to Malang significantly; but, job vacancy in origin area does not bring significant effect toward migrant women's decision making to migrate to Malang.
Sustainable Landuse Model at Upper Cikapundung River – North Bandung Darsiharjo Darsiharjo
Forum Geografi Vol 18, No 1 (2004)
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v18i1.597

Abstract

Land use in upper catchment of Cikapundung progressively do not in control, so that many land use disagree with required condition. The objectives of the research were to: 1) evaluating of existing land use suitability with to its land suitability; and 2) compiling simulation land use model which have been formulated to study the expense of conservation, beneficial crop type and conservation action alternative. In this research made three submodel (erosion submodel use USLE and Arsyad, runoff submodel use Bransby and Williams, and social economic submodel use B/C ratio and NPV); and than integrated to become one land use model in upper catchment by using computer program package “Poersim Version 2.5c”. The model is simulation by considering aspect land suitability, is then obtained by form land use sustainable. Land use in Cikapundung upper catchment equal to 70,52% disagree with land condition. The rate of occured erosion in dry land, pine forest and plantation of quinine have is abysmal of permissible erosion, while in natural forest, rice field, and grass land still is normal. Run off coefficient from all region per year go up equal to 0,3878%. And B/C dry land equal to 3,33. To maintain thickness of land and reducing runoff coefficient but admiting of to support life  farmer, minimum 10% from rest of obtained production in using to defray activity of conservation. Crop vegetable type which still profit is potato, chickpea, and pepper so long as minimizing 5% from rest of obtained production to be used for the activity of conservation, appropriate action conservation type is credit terrace because can be done step by step every process farm so that farm can be exploited on an sustainable.
Analisis Periodisitas Curah Hujan dengan Pendekatan Deret Fourier (Studi Kasus di Daerah Aliran Sungai Kali Konto Hulu) S Sudibyakto
Forum Geografi Vol 6, No 1 (1992): July 1992
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v6i1.4684

Abstract

Tujuan penelitian ini ialah untuk mendapatkan harmonik-harmonik yang memberi sumbangan terhadap ragam data hujan tahunan rata-rata pada Stasiun Pujon dan Ngantang di DAS Kali Konto Hulu, Jawa Timur, sehingga dapat disusun persamaan Deret Fourier. Data utama ialah data hujan tahunan rata-rata di Pujon selama 26 tahun (1951-1988) dan Ngantang selama 29 tahun (1960-1988). Tahap analisis data adalah uji normalitas, uji homogenitas, rata-rata bergerak, dan analisis harmonik. Hasil uji normalitas dan homogenitas menunjukkan bahwa data di kedua, stasiun menyebar normal dan homogen, sedangkan rata-rata bergerak polynomial menggunakan orde-9 adalah paling sesuai dengan data asli. Analisis harmonik data hujan stasiun Pujon menunjukkan tiga harmonik. Sumbangan ragam terjadi pada harmonik III sebesar 61% dan diikuti oleh Harmonik I dan II masing-masing mempunyai ragam 4% dan 2%. Kurva Harmonik pada stasiun Ngantang relatif hampir sama antara harmonik I, II dan III dengan sumbangan ragam berturut-turut sebesar 7%, 4% dan 3%. Dengan demiktan dapat disusun dua persamaan deret Fourier untuk kedua stasiun tersebut.
Soil Sequence at Western Slope of Lawu Volcano Jamulya Jamulya
Forum Geografi Vol 14, No 1 (2000)
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v14i1.451

Abstract

The objectives of this  study was sto know the soil sequence according to topographic position on west part of Lawu volcano. Interpretation of topographic map and landsat image, making topographic cross section from upper slope, lower slope to fluvio volcanic plain were carried out for reference the location of soil profile morphological description. Soil morphological description in representative soil profile on every landscape unit. Taking soil samples for analysing physical and chemical properties to know soil development. The result indicated  that go down to the slope, from upper slope, lower slope to fluvio volcanic plain, there were 4 soil landscape or 4 soil great group i.e. Melamudands (Andosol), Eutrudepts (Latosol), Ferrudalfs (Mediteran), and Udifluvents (Alluvial).
Analysis of Long-Term Temperature Trend as an Urban Climate Change Indicator Dadang Subarna
Forum Geografi Vol 31, No 2 (2017): December 2017
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v31i2.4189

Abstract

Temperature plays a major role in detecting climate change brought about by urbanisation and industrialisation. Most climatic impact studies rely on changes in the average values of meteorological variables such as temperature. This paper attempts to study the temporal changes in the mean value of the air surface temperature over Jakarta city during the last century, specifically in the period 1901–2002.The data used in this study were taken from the Jakarta Climatology Station because they are of are good quality, there are extensive records and there is little missing or blank data. Statistic descriptive methods were employed, including a description of the type of probabilistic model chosen to represent the monthly mean air surface temperature time series. The long-term change in temperature was evaluated using the Mann-Kendall trend test method and the statistical linear trend test; the results of these two tests agreed. During the last 100 years, data observations from the station indicate that the monthly mean value of the air surface temperature of Jakarta city has increased at a rate of about 0.152°C decade–1 and has not exhibited variability signals but has changed on average. Based on the linear regression model, the mean value of the air surface temperature over Jakarta city is estimated to reach around 28.5°C in 2050 and 29.23°C in 2100.
Geospatial Analysis and Turbidity Measurement for Monitoring Suspended Solid of Hitotsuse Dam in Miyazaki Prefecture, Kyushu, Japan Purnama Budi Santosa; Yasuhiro Mitani
Forum Geografi Vol 29, No 2 (2015): December 2015
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v29i2.991

Abstract

The existence of suspended solids at Hitotsuse dam, Miyazaki Prefecture, Kyushu, Japan, has been the main concern of Kyushu Electric Power Company. These have been carried by rivers flowing into the dam. In a long term, it is worried that this phenomenon will potentially cause the environmental degradation, especially around the dam, where the Kyushu Electric Power Plant is located. Therefore, necessary measures are required to protect the dam from environmental degradation, which in return is to assure its long term power plant operational. Preliminary studies found that the suspended solid, which was generated upstreams and was carried out into the dam by rivers, causes the turbid water resident. Therefore, evaluation on the potential sources of the existence of the suspended solids needs to be carried out. In this research, analysis was conducted to understand the spatial distribution and the quantity of the suspended solid. For this purpose, by focusing attention on the upper river basin of reservoir, several factors which are possible to cause turbid water are extracted and analyzed quantitatively by using GIS. To understand the characteristic of the river turbidity, river flows and river turbidity are measured at several selected stations. Then mechanical factors causing turbid water are identified after analyzing relationship between efflux characteristics and possible factors of suspended solids. The results show that spatial information extraction could be done efficiently by applying spatial analysis method. Furthermore, by applying multiple regression analysis, it was found that landslide scars, artificial forests, drainage area, and terrain undulation are indicated as the dominant factors causing the turbidity.
Role of Remote Sensing Data and Geographic Information Systems to Support in Landuse Planning Activity at Urban Area Sugiharto Budi Santoso
Forum Geografi Vol 12, No 2 (1998)
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v12i2.474

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.
Acknowledgement for Reviewers Volume 32 2018 Jumadi Jumadi
Forum Geografi Vol 32, No 2 (2018): December 2018
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v32i2.7596

Abstract

Aplikasi Penginderan Jauh dan Sig Untuk Penetapan Tingkat Kemampuan Penggunaan Lahan (KPL) (Studi Kasus di DAS Nawagaon Maskara, Saharanpur-India) Beny Harjadi
Forum Geografi Vol 21, No 1 (2007): July 2007
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v21i1.1818

Abstract

The land that was increasingly crowded resulting from the inhabitants’s speeding-up pressure, required the utilisation of the land to be as efficient and as effectively as possible. For this matter must be known by the LUC (Land Use Capability) class respectively the unit of the land management, so as to be known as early as possible the obstacle factor from the land and could be done by the utilisation of the land as optimally as possible. The implementation of the LUC determination must be carried out a stage for the sake of a stage by counting LUC respectively the main factor, so as to be received by LUC-Soil, LUC-Erosion, and LUC-Slope. The next one of the three of this LUC were just counted by the value of the maximum to appoint LUC Final. LUC-Slope by being based on the Wischmeier and Smith (1978), LUC-Erosion was counted by using the quantitative MMF erosion formula (Morgan, Morgan, and Finney), and LUC-Soil by gathering the physical data the field took the form of the texture data of the land, drainage, solum and the percentage of the rock in the surface. LUC-Erosion and LUC-Soil were received by 5 LUC classes (I, II, III, IV, IV, and VI), whereas LUC-Slope was received by 7 LUC classes all of them except the V. LUC I class until IV were recommended for the agricultural crop and LUC V until VIII for the forestry crop. From 11 of Sub Watershed LUC VIII was expanded 107.54 ha to Sub Watershed Sarbar Rao and narrowest to Sub Watershed Maskara Rao (0.12 ha). On the other hand for LUC II was expanded to Sub Watershed Nawagaon Rao (1136.8 ha) and narrowest (1.51 ha) to Sub Watershed Shakumbari Rao. The location of the research in Sub Watershed Nawagaon Rao Mascara the Saharanpur city, India, with the location goegrafis from 30 o 09’ 00" N - 30o 21’ 00" N and longitude 77 o 34’ 00" E - 77 o 51’ 00" E, widely the Watershed whole 205.94 km2 or 20594.49 ha. The analysis of the image satelit with IRS (Indian Remote Sensing) LISS IV in January 2005, the analysis of three dimensions with DEM SRTM, and the map of the topography of the sheet 53 F/11, 53 F/12, 53 F/15 and 53 F/16. The aim of the research of determining the LUC class by counting each one of LUC-Soil, LUC-Erosion, and LUC-Slope. The use of the land in the Nawagaon Maskara Rao Watershed in part: Wheat super (969,26), normal Wheat (2753.7 ha), the Orchard (2103.2 ha), the Forest was rather close (3930.5 ha), the Forest was open (3352.1 ha), Scrub (168.62 ha), Brush rocky (658.56 ha), and Open land (1814.8 ha). Was based on results of this research recomendation for LUC VIII was only for the protected forest that might not be touched or produced.

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