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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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Evaluation of Satellite Image Correction Methods Caused by Differential Terrain Illumination Santosa, Purnama Budi
Forum Geografi Vol 30, No 1 (2016): July 2016
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v30i1.1768

Abstract

The problem due to differential terrain illumination on satellite imagery is experienced by most of areas which are on mountainous terrain. This may cause variations in reflectance of similar ground features which lead to a misclassification of land cover classes due to different topographic positions. This phenomenon most commonly occurred in the areas which are located on southern and northern hemisphere because of the low sun inclination. This problem has been a major interest for researchers to be solved prior to the land cover classification process. For satellite images which experience this kind of problem, topographic correction need to be applied in order to reduce the illumination effects prior to land cover classification process. This research is aimed at conducting topographic correction of multi spectral SPOT satellite data as well as evaluating the three topographic correction methods. They are Cosine which is based on Lambertian reflectance assumption, as well as Minnaert correction and C correction methods which are based on non-Lambertian reflectance assumption. The data used in this study are two scenes of SPOT images of forested mountainous area of Miyazaki Prefecture, Kyushu, Japan. Research steps had been conducted in this study including geometric correction, sample data collection for calculating Minnaert constants and C constants at location which represents the whole study area, topographic correction for two scenes SPOT images, and results analysis. The results show that Cosine method did not show good performance for the study area which is topographically dominated by rugged terrain. Whereas Minnaert method and C method gave satisfactory results as is indicated by the statistical data as well as visual interpretation. However the Minnaert correction method showed slightly better performance than the C correction method.
Identification of Land Degradation and Method of Solution in Zone of Baturagung Hill at Gunung Kidul Regency Santosa, Langgeng Wahyu
Forum Geografi Vol 19, No 1 (2005): July 2005
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v19i1.4571

Abstract

Baturagung hill is a folded hill range consisting mainly of Tertiary volcanic rocks which have been undergoing severe faulting, jointing and weathering. Lies on the altitude between 200 and 700 meter from see level, the area is characterized by sloping to steep relief with 30% to >40% of slope, and shallow soils with scattered outcrops. Such geomorphological setting has made the area subject to intense soil erosion and masswasthing. Mining activates has also been accounted for the explanation of the current heightened land degradation in the area. The present paper, accordingly, is intended to identify the land degradation by considering mass movement, bare land, and mining activity parameters. The present paper founds that the Baturagung hill can be divided into three zones, namely: (1) the zone of no to low degradation (hill slope and inter-hill valley); (2) the zone of high degradation rate (within the area having 30 to 40% of slope); and (3) the zone of severe degradation (within the area having slope of more than 45%).
Groundwater Quality and the Settlements Condition in Cholil, Munawar
Forum Geografi Vol 10, No 1 (1996)
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v10i1.512

Abstract

To comprehend the factors which influence on the juvenile water, it needs paying attention to the rocks permeability, the thickness of the aeration zone, the type of the material composition and the depth of the ground water. The grade of the ground water quality, both ground water in general and juvenile water in the urban, is dependent upon the natural physical, man made physical, and the condition of the local inhabitant besides the another factors. The influence grade of the factors are undersirable yet because among of them there are cross-linkages. The linkage of the ground water quality condition, besides another factor, inconfirmed by the inhabitant and the settelement. The aspect of the man made physical, both sanitation condition and the population density with their activity effect i.e. sewage by product, should fully determine the ground water quality. There is a closed connection between the juvenile water quality and the settlement condition, mainly, in the case is the domestic sewage disposal. It is estimated that the unit of settlement associates with the grade of the juvenile water quality. Some of the variabilities which are desirable to sustain the settlement condition and constitutes the influence variability i.e. the density of the population and buildings, and the condition of the drainage system for sewage.
Aplikasi Model SMAR pada Dua DAS Identik Indarto, I
Forum Geografi Vol 26, No 1 (2012): July 2012
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v26i1.5048

Abstract

This paper shows the evaluation process (calibration and validation) of SMAR (The Soil Moisture Accounting Rainfall-Runoff) model at two identical catchment areas (Rawatamtu and Kloposawit) in East Java – Indonesia. Daily discharge, rainfall data and meteorological data were collected from measurement stations located at the catchments areas. Potential evapotranspiration (PET) was calculated from meteorological data extracted from existing stations located inside of the catchments. Calibration was conducted for periods of: 1991 to 1994, while validation was tested for periode of: 1995 to 2000. Model performance was evaluated by means of: (1) Nash-Sutcliffe coefficient, (2) correlation coefficient and (3) graphical comparation of calculated and measured flow. The result show the Nash-Sutcliffe coeffient = 0,73 and correlation coefficient = 0,86 for calibration period at Rawatamtu, while the same coefficients for Kloposawit are 0,54 and 0,74. Validation periode produce Nash-sutcliffe and correlation coefficients = 0,35 and 0,64 for Rawatamtu. While for Kloposawit the values are 0,48 and 0,81.
The Poverty in Indonesia: Concept, Approach, and the Reduction Strategies Musiyam, Muhammad
Forum Geografi Vol 6, No 2 (1992): December 1992
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v6i2.396

Abstract

Apparently, the policy of raise poverly in Indonesia start to change. In PJPT I, the strategy to raise the poverly acupied the position “Side stream of development” only. That is, the effort to raise the poverly only applied the components of macro economic policy to maintain the growth of the economy in high position. In PJPT II this effort occupy the position “main stream of development”. That is, not only does the effort depend on “trickle down effect’, but also through direct attack that concern to destitude people. The poverly phenomenon is complex problem and multidimensional, that’s not merely concern with welfare aspect (materially). Therefore, in order to the raising of poverly run effectively, we have to look the dimension of poverly as a whole. Complexity of poverly problems vary from place to place. Therefore, it is needed an accurate strategy and it must consider the characteristic of poverly and the potency that suitable to be developed. 
Perbaikan Irigasi dan Kehidupan Petani (Studi Kasus Irigasi dan Perubahan Sosial Ekonomi di Desa Bugo, Jepara) Priyana, Yuli
Forum Geografi Vol 7, No 1 (1993): July 1993
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v7i1.4794

Abstract

Penelitian ini bertujuan untuk mengetabui kondisi irigasi serta pengaruh perbaikan irigasi terhadap perubahan sosial masyarakat desa Bugo, terutama terbadap penguasaan lahan, pola tanam, pendapatan, dan penyerapan tenaga kerja serta hubungan kerja pada bidang pertanian. Pendekatan yang dipergunakan adalah pendekatan kualitatif, dengan pendekatan ini diharapkan akan mendapatkan informasi yang diharapkan, guna menunjang pembahasan penulis berusaha mendapatkan data kuantitatif yang relefan. Dari hasil penelitian ini diketabui bahwa petani pada desa Bugo masih banyak yang merupakan petani tradisional, artinya mereka masih enggan untuk menerima teknologi yang baru, lebih suka pada cara-cara yang biasa dilakukan oleh pendabulunya. Pada perbaikan irigasi menegemen dan saluran sekunder masih kurang sempurna sehingga air kurang biasa merata penyebarannya pada daerah oncoran. Pegaruh yang timbul pada masyarakat yakni; terjadinya perubahan pola tanam dari padi-polowijo-polowijo menjadi padi-padi-polowijo, dari perubahan tersebut secara tidak langsung juga berpengaruh positif terbadap pendapatan rumah tangga petani. Dengan petani-petani tiap bektarnya bertambah, ternyata tidak terjadi polarisasi penguasaan lahan pada petani kaya, dari 142 petani didapatkan 38.7% dari jumlah tersebut petani miskin menguasai 17.2% luas lahan. Hubungan kerja pada petani juga belum nampak adanya komersialisme, hanya saja ada kecenderungan sebagian dari mereka memanenkan hasil panenannya kepada “pengedos”, dan sebagian besar masih dipanenkan pada tetangga dengan sistem “derep”. Tanaman padi ternyata banyak menyerap tenaga kerja dari pada tanaman polowijo pada daerah tersebut. Usaha sektor non pertanian pada daerah tersebut yang berkembang adalah usaha industri rumah tangga pangan, pada usaha ini ternyata juga cukup menyerap tenaga kerja dan memberikan penghasilan pada penduduk yang cukup lumayan.
Easiness of Image Interpretation of Spot XS and Landsat TM for Urban Land Cover Object Identification Suryantoro, Agus
Forum Geografi Vol 17, No 1 (2003)
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v17i1.594

Abstract

The study that has been out for URGE project “Remote sensing for urban study and landuse planning” is a  especially the possibility and the easiness of interpretability. The easiness of interpretation of satellite image is influenced by sensor, and the physical condition of urban area. SPOT image recorded in 1996 and TM Landsat image recorded in 1994 by the process of digital image are used as the comparison of easiness of interpretation. The contras sharpening method using a filter, the arrangement of composite image, and multispectral classification is applied by respective image. The introduction of covered object of urban area is based on the introduction of spatial and spectral pattern. Visual and digital interpretation that based on multispectral classification has been done to get the accurateness of classification result. The result of this study shows that SPOT image has better detail information than TM Lansat image. But the spectral information of TM Lansat image has more varieties than that of SPOT image so that certain objects, especially straight appearance (street, river, etc) can be  know more by TM Lansat.
Hydrogeology of Karang Mumus Watershed in Samarinda, East Kalimantan Province, Indonesia Devy, Shalaho Dina
Forum Geografi Vol 32, No 1 (2018): July 2018
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v32i1.5229

Abstract

Samarinda is part of an anticlinorium, which is marked by the existence of many anticlines. In addition, various types of rock and aquifer can be found in the city due to the uniqueness of geological structure of the area. Nevertheless, the literature are lacking attention of hydrogeological condition of this area. This research aims to determine the hydrogeology of the Karang Mumus watershed, particularly in relation to its geology and land use conditions. The research uses an inductive method, with an analytical approach consisting of a study of the land use, hydrological conditions, geology, geomorphology and hydrogeology. The Karang Mumus watershed can be divided into three hydrogeological layers: (1) an aquitard layer, the top layer, which has a hydraulic conductivity of 4.3 × 10-6 m/sec, and is dominated by siltstone; (2) an aquifer layer in the middle, with a hydraulic conductivity of 2.6 × 10-4 m/sec, dominated by sand and sandstone; and (3) an aquiclude layer occupying the lower layer, with a hydraulic conductivity of 1.6 × 10-11 m/sec, and which is dominated by claystone.
Consumption of Water for Household Needs and the Affecting Factors at Banyudono Boyolali Kaeksi, Retno Woro; Priyana, Yuli; Anna, Alif Noor
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.v14i1.448

Abstract

The consumption of drinking water for a community is different from one area to the other. This is normally influenced by the population development, socio-economic, cultural, and physical conditions mainly related to the supply of drinking water and how to exploit it. Banyudono district is an area located in the regency of Boyolali. The development of this area depends on Boyolali City and Kartasura district. Such a location enables the area to have a process of the physical and socio-economi developments. In addition, it has an influence upon social behaviour to consume water. This research is aimed at knowing the average consumption of household need and analyzing the factors influencing the utilization of water as drinking water. The result of this research indicated that 1) the average consumption of a human being for drinking water was 79,37 litter a day. It means that the onsumption of a human being for drinking ater generally ranged from 60 to 80 litter a day; 2) most of the ater was consumed to meet basic needs such as cooking, drinking, bathing, and washing; 3) the difference of the average consumption was influenced by the kind of water source and how to exploit it; 4) a parameter of the most significant socio-economic condition that took effect on the average consumption for drinking water was the parameter of income with correlation of 0.362 and the significant level of 0.01.
Surface Erosion Impact in Upper Serang Watershed Kemusu Municiaplity Boyolali District Centra Java Priyono, Kuswaji Dwi
Forum Geografi Vol 4, No 2 (1990): December 1990
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v4i2.4854

Abstract

The aim of this reseach are two fold. The first it to clasify and evaluate the surface crosivity and the second is to map the erosivity hazard. The final yield is a map of ... - ... in 1 : 50.000. the classification of surface erosivity is based on top soil loss maximum using the Universal Soil Loss Equation (USLE) of Wischmeir and Smith Method; that is executed on every unit of land. Land unit is detected through interpretation of false colour I.R. air photograph images, shot in 1981/ 1982, scale 1 : 50.000. The classification fields the following data : erosity intensity is 6,687.5 hm (26.78 percent) is ultimate low; 2,962.5 hm (11.86 percent) is low; 5,025.0 hm (20.12 percent) is medium 5,025.0 hm (20.12 percent) is medium 287.5 hm (1.15 percent) is high, while the in habited area has 4,637 hm (18.57 percent) or classified as a very low intensity.

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