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INDONESIA
Forum Geografi
ISSN : 08520682     EISSN : 24603945     DOI : -
Core Subject : Science,
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 12 Documents
Search results for , issue " Vol 17, No 2 (2003)" : 12 Documents clear
Community-Based Rehabilitation of Critical Land at Jenar, Sragen, Central Java Suharjo, Suharjo
Forum Geografi Vol 17, No 2 (2003)
Publisher : Forum Geografi

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Abstract

The aims of the study of critical land rehabitation basing on the society in Jenar Sragen are to know: 1) the factory which cause the critical land; 2) the way to solve critical land; and 3) the role society in solving critical land. The collected date are 1) topography, 2) litologhy, 3) geomorphology, 4) soil, 5) hydrology, 6) land use, 7) the apportion of critical land, and 8) the way to solve critical land. The choice of sample uses purposive method, while the data analysis to get result uses descriptive method. The result of the study show that: 1) the distribution of critical land is in land unit of anticline hills of tuff rocks, marl, clay, and sand tuff which are denudated process by rensina soil and litosol from light to heavy which lie in dry land cultivation and forest. The factors which influence critical land are high rainfall (2178 mm), inclination slope (8 – 20%), solun soil whih is less than 20 cm and denudation process high is active; 2) the way that has been done is solving critical land rehabilitation is cooperation among the society, the forestry and commercial agricultural department and cone sugar factory of Mojo Sragen. The critical land which has been rehabilitated is state forest (266.95 ha) and the dry lang cultivation of the society (772.50 ha); 3) the society has responsibility for the growth, the development and preservation of the long term plants (jati, sonokeling, mahoni). The participation of the society in that programme is about 3.117 people.
Utilization of Remote Sensing Techniques for Monitoring and Evaluation of Solo Watershed Management Gunawan, Totok
Forum Geografi Vol 17, No 2 (2003)
Publisher : Forum Geografi

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Abstract

This research is an application of remote sensing technology for monitoring and evaluation of watershed management, which was conducted is Solo Watershed, Central and East Java. The research objectives were 1) to investigate the capability of photomorphic analysis of Landsat Thematic Mapper (TM) and Enhanced Themmatic Mapper (ETM +) imagery as the basic for analyzes of landforms, landuse, and morphometry of the land surface; 2) to calculate the overland flow – peak discharge and erosion – sediment yield as indicators of land degradation of the area; 3) to use the indicators as set of instrument for monitoring and evaluation of watershed management. In this study, visual interpretation by means of on-screen digilization of the digital imagery was carried out in order to identify and to delineate land parameters using photomorphic approach. Based on the photomorphic analysis, several image – based parameters such as relief topography, physical soil characteristic, litho – stratigraphy, and vegetation cover were integrated with other themati maps in a geographic information system (GIS) environment. Estimation of overland flow (C) based on Cook methods (1942) and calculation of peak disccharge (Qmax) based on rational method (Qmax = C. I. A) were applied. Meanwhile, estimation of surface erosion was carried out using Universal Soil Loss Equation (USLE, A = R. K. L. S. CP). The sediment yield (Sy) was estimated using seddiment delivery ratio ( SDR) based on the following formula: Sy = [A + (25% x A)] x SDR. Both pairs of C – Qmax and A – Sy, were utilized as the basis for monitoring and evaluation of the watershed. The combination of C – Qmax and A – Sy were also used as the basis for selection of stream gauge setting / AWLR within particular sub – catchment. It was found that the photomorphic analysis is only color/tone, slope aspects, pattern, and texture, unit boundaries between volcanic – origin landscape (Wilis volcanic complex) and folded – hills landforms (Kendeng ridges) can be delineated. Within the volcanic features, coarse – textured units indicating pyroclastic materials with high drainage density (western part of Lawu volcano). In terms of calculated overland flow and peak discharge of 100 sub – catchment within the Solo Watershed, it was found that there are four sub – catchment with relatively high values (> 0.60 and > 1200 m3s1 for overland flow and peak discharge repectively), namely Samin (Karanganyar), Keduang (Wonogiri), Dengkeng (Klaten), and Sungkur (Ponorogo). Five sub-catchment might be categorized as having moderate peak discharge (Qmax ranges from 1000 – 1200 m3s1), namely Ketonggo (Ngawi), Keyang (Ponorogo), Gandong – Semawur (Magetan), Pepe (Boyolali), and Soko (Bojonegoro), while the remaining 91 sub-catchments are categorized as having low peak discharge. Based on the calculation of erosion and sediment yield, there was no sub-catchment with moderate category (60 – 180 ton ha1yr1), i.e. Samin (Karanganyar), Gonggong (Magetan), Ngisip and Kedung Cilik (Tuban), and Pepe (Boyolali). The other 95 sub-catchment might be categorized as gentle to good. In terms of values representing overland flow – flood and erosion – sediment yield, there are several sub-catchments require first priority in monitoring and evaluation, and are recommended as suitable sites for stream gauge setting, i.e. Samin (Karanganyar), Gonggong (Magetan), Ngisip and Kedung Cilik (Tuban).
Feasibility Study of Padarangin Cave Slogohimo Wonogiri for Eco-Tourism Priyono, Kuswaji Dwi
Forum Geografi Vol 17, No 2 (2003)
Publisher : Forum Geografi

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Abstract

Area of Karst of mount Sewu in countryside of Padarangin own immeasurable of potency to be developed by besides activity of mining namely the tourism activity. Cave of nature found enable to can be developed as tourism, but date not yet been known how big potency of relevant tourism with the cave.  In line with the problems, this research aim to provide basic data of potency of cave and assess elegibility of cave. Padarangin for ecotourism in Wonogiri Regeny. Method used by survey of field and interview resident. Result of research indicate that cave of Padarangin have mount of cave at height 848 m msl which relative narrow, chamber horizontal as long as 63,8 m and vertical in 32,5 m. Needed by a special equipment to enter cave with capasities 10 – 15 people once the visit/incoming, owning value of sakral trusted by local society. The cave competent to be developed as tourism object of special enthusasm with visit limited. 
Modeling Hot Spot Motor Vehicle Theft Crime in Relation to Landuse and Settlement Patterns Marwasta, Djaka; Suharsono, Suharsono
Forum Geografi Vol 17, No 2 (2003)
Publisher : Forum Geografi

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Abstract

The crowd of Yogyakarta urban has impacted its surrounding area, including Depok sub district, which is indicated by the rising of physical development, for example education facilities and settlements. The progress does not only bring positive impact, but also negative impact for instance the rising of crime number i.e. motor vehicle robbery. The aims of this research are 1) mapping motor vehicle robbery data as the distribution map and identifying motor vehicle robbery hot spot base on distrbution map; and 2) studying the correlation of motor vehicle robbery hot spot with physical environment phenomena, i.e. land use type and settlement pattern. The research method consists of two parts; they are motor vehicle robbery cluster analysis and the relation of motor vehicle robbery and physical environment analysis. Motor vehicle robbery cluster analysis is using distribution data, which analyzes the distribution into motor vehicle robbery hot spot with nearest neighbor tehnique. Contingency coefficient and frequency distribution analysis is used to analyze the correlation of motor vehicle robbery hot spot and physical environment. Contingency coefficient is used to study the relation of motor vehicle robbery hot spot polygon with physical environment condition, whereas frequency distribution is used to study the distribution of motor vehicle robbery in the hot spot with physical environment condition. Physical environment which consists of land use type, housing density, house regularity pattern, and the average of building size, are obtained from interpretation of black and white panchromatic aerial photograph year 2000, in the scale 1 : 20.000. the most motor vehicle robbery hot spot is found on the settlement area, 68,3% from 378 motor vehicle robbery cases in the hot spot. The seond level is found on the education area (16.4%). The most motor vehicle hot spot in the settlement is found on the hight density and irregular settlement, which have big size buildings. The calculation of contingency coefficient shows that there was a significant correlation between motor vehicle robbery hot spot with land use type and settlement pattern, but it has low correlation value. It means that land use type and settlement pattern have weak influence to the hot spot existence.
Aerial Photo Utilization in Estimating Suspended Sediment in the Wuryantoro Watershed, Wonogiri Santoso, Sugiharto Budi; Priyono, Kuswaji Dwi; Anna, Alif Noor
Forum Geografi Vol 17, No 2 (2003)
Publisher : Forum Geografi

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Abstract

Suspended sediment load flowing out from a watershed is normally predicated by analysis os suspended sediment of water sample, and the volume of suspended sediment be calculated based on sediment concentration and river discharge. Such field measurements need a lot of field data and they are time consuming. Another method for prediction of suspended sediment by using remote sensing imagery data and recorded rainfall data. The objective of this research is to 1) examine the capability of remote sensing technique to obtain the parameters of the physical data of land in the prediction of suspended sediment; 2) examine the accuracy of the model for prediction suspended sediment. This research is carried out in Wuryantoro watershed, Wonogiri. The main data to obtain the parameters of the physical data of land is infrared aerial photograph on scale 1 : 10.000. the method that used in this research is interpretation of remote sensing imagery data, combined with rainfall data. The result show that the accuracy of landuse is 88.5%, the accuracy of slope is 87.67%. the accuracy of the prediction of suspended sediment by model A3 87.07%, model C1 86.63%, model C2 90.57%, model A8 84.13%, model A9 80.1%, and model C4 78.6%.
Impact of the Presence of Bunker of Liquid Organic Fertilizer (POC) on Groundwater for Drinking in Sambungmacan Sragen Anna, Alif Noor; Suharjo, Suharjo; Kaeksi, Retno Woro
Forum Geografi Vol 17, No 2 (2003)
Publisher : Forum Geografi

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Abstract

The study of impact of the banker of liquid organic fertilizer (POC) on groundwater is carried out in Sambungmacan Sragen. The banker is made of concrete cement and it is located in the settlement area. This bunker causes obstruction for population, such as the smell bad, many died cassava, plants, and well pollution. The source of these obstruction is the leakage that permeates on groundwater used for drinking water. The aims of this study are know 1) the apportion of the groundwater pollution; 2) the level of groundwater pollution of drinking water. The result of the study shows that POC has permeated two population’s wells that are located in radius eight meters. The water of wells is muddy and smells bad. Finally the well in north side of the banker is not used anymore, while the well in the west side of the banker, its water is still fresh after it has been drained twice. After the banker of liquid organic fertilizer (POC) is not be used anymore and the well which is polluted by POC has been drained, cause of that, the quality of groundwater in the research area generally still fullfills the requirement of drinking water, except the well in north side of the banker because it is polluted (the smell and color). So that, classification groundwater pollution in research area is still in very low level.
Impact of the Presence of Bunker of Liquid Organic Fertilizer (POC) on Groundwater for Drinking in Sambungmacan Sragen Anna, Alif Noor; Suharjo, Suharjo; Kaeksi, Retno Woro
Forum Geografi Vol 17, No 2 (2003)
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v17i2.535

Abstract

The study of impact of the banker of liquid organic fertilizer (POC) on groundwater is carried out in Sambungmacan Sragen. The banker is made of concrete cement and it is located in the settlement area. This bunker causes obstruction for population, such as the smell bad, many died cassava, plants, and well pollution. The source of these obstruction is the leakage that permeates on groundwater used for drinking water. The aims of this study are know 1) the apportion of the groundwater pollution; 2) the level of groundwater pollution of drinking water. The result of the study shows that POC has permeated two population’s wells that are located in radius eight meters. The water of wells is muddy and smells bad. Finally the well in north side of the banker is not used anymore, while the well in the west side of the banker, its water is still fresh after it has been drained twice. After the banker of liquid organic fertilizer (POC) is not be used anymore and the well which is polluted by POC has been drained, cause of that, the quality of groundwater in the research area generally still fullfills the requirement of drinking water, except the well in north side of the banker because it is polluted (the smell and color). So that, classification groundwater pollution in research area is still in very low level.
Community-Based Rehabilitation of Critical Land at Jenar, Sragen, Central Java Suharjo, S
Forum Geografi Vol 17, No 2 (2003)
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v17i2.536

Abstract

The aims of the study of critical land rehabitation basing on the society in Jenar Sragen are to know: 1) the factory which cause the critical land; 2) the way to solve critical land; and 3) the role society in solving critical land. The collected date are 1) topography, 2) litologhy, 3) geomorphology, 4) soil, 5) hydrology, 6) land use, 7) the apportion of critical land, and 8) the way to solve critical land. The choice of sample uses purposive method, while the data analysis to get result uses descriptive method. The result of the study show that: 1) the distribution of critical land is in land unit of anticline hills of tuff rocks, marl, clay, and sand tuff which are denudated process by rensina soil and litosol from light to heavy which lie in dry land cultivation and forest. The factors which influence critical land are high rainfall (2178 mm), inclination slope (8 – 20%), solun soil whih is less than 20 cm and denudation process high is active; 2) the way that has been done is solving critical land rehabilitation is cooperation among the society, the forestry and commercial agricultural department and cone sugar factory of Mojo Sragen. The critical land which has been rehabilitated is state forest (266.95 ha) and the dry lang cultivation of the society (772.50 ha); 3) the society has responsibility for the growth, the development and preservation of the long term plants (jati, sonokeling, mahoni). The participation of the society in that programme is about 3.117 people.
Utilization of Remote Sensing Techniques for Monitoring and Evaluation of Solo Watershed Management Gunawan, Totok
Forum Geografi Vol 17, No 2 (2003)
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v17i2.532

Abstract

This research is an application of remote sensing technology for monitoring and evaluation of watershed management, which was conducted is Solo Watershed, Central and East Java. The research objectives were 1) to investigate the capability of photomorphic analysis of Landsat Thematic Mapper (TM) and Enhanced Themmatic Mapper (ETM +) imagery as the basic for analyzes of landforms, landuse, and morphometry of the land surface; 2) to calculate the overland flow – peak discharge and erosion – sediment yield as indicators of land degradation of the area; 3) to use the indicators as set of instrument for monitoring and evaluation of watershed management. In this study, visual interpretation by means of on-screen digilization of the digital imagery was carried out in order to identify and to delineate land parameters using photomorphic approach. Based on the photomorphic analysis, several image – based parameters such as relief topography, physical soil characteristic, litho – stratigraphy, and vegetation cover were integrated with other themati maps in a geographic information system (GIS) environment. Estimation of overland flow (C) based on Cook methods (1942) and calculation of peak disccharge (Qmax) based on rational method (Qmax = C. I. A) were applied. Meanwhile, estimation of surface erosion was carried out using Universal Soil Loss Equation (USLE, A = R. K. L. S. CP). The sediment yield (Sy) was estimated using seddiment delivery ratio ( SDR) based on the following formula: Sy = [A + (25% x A)] x SDR. Both pairs of C – Qmax and A – Sy, were utilized as the basis for monitoring and evaluation of the watershed. The combination of C – Qmax and A – Sy were also used as the basis for selection of stream gauge setting / AWLR within particular sub – catchment. It was found that the photomorphic analysis is only color/tone, slope aspects, pattern, and texture, unit boundaries between volcanic – origin landscape (Wilis volcanic complex) and folded – hills landforms (Kendeng ridges) can be delineated. Within the volcanic features, coarse – textured units indicating pyroclastic materials with high drainage density (western part of Lawu volcano). In terms of calculated overland flow and peak discharge of 100 sub – catchment within the Solo Watershed, it was found that there are four sub – catchment with relatively high values (> 0.60 and > 1200 m3s1 for overland flow and peak discharge repectively), namely Samin (Karanganyar), Keduang (Wonogiri), Dengkeng (Klaten), and Sungkur (Ponorogo). Five sub-catchment might be categorized as having moderate peak discharge (Qmax ranges from 1000 – 1200 m3s1), namely Ketonggo (Ngawi), Keyang (Ponorogo), Gandong – Semawur (Magetan), Pepe (Boyolali), and Soko (Bojonegoro), while the remaining 91 sub-catchments are categorized as having low peak discharge. Based on the calculation of erosion and sediment yield, there was no sub-catchment with moderate category (60 – 180 ton ha1yr1), i.e. Samin (Karanganyar), Gonggong (Magetan), Ngisip and Kedung Cilik (Tuban), and Pepe (Boyolali). The other 95 sub-catchment might be categorized as gentle to good. In terms of values representing overland flow – flood and erosion – sediment yield, there are several sub-catchments require first priority in monitoring and evaluation, and are recommended as suitable sites for stream gauge setting, i.e. Samin (Karanganyar), Gonggong (Magetan), Ngisip and Kedung Cilik (Tuban).
Feasibility Study of Padarangin Cave Slogohimo Wonogiri for Eco-Tourism Priyono, Kuswaji Dwi
Forum Geografi Vol 17, No 2 (2003)
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v17i2.537

Abstract

Area of Karst of mount Sewu in countryside of Padarangin own immeasurable of potency to be developed by besides activity of mining namely the tourism activity. Cave of nature found enable to can be developed as tourism, but date not yet been known how big potency of relevant tourism with the cave.  In line with the problems, this research aim to provide basic data of potency of cave and assess elegibility of cave. Padarangin for ecotourism in Wonogiri Regeny. Method used by survey of field and interview resident. Result of research indicate that cave of Padarangin have mount of cave at height 848 m msl which relative narrow, chamber horizontal as long as 63,8 m and vertical in 32,5 m. Needed by a special equipment to enter cave with capasities 10 – 15 people once the visit/incoming, owning value of sakral trusted by local society. The cave competent to be developed as tourism object of special enthusasm with visit limited. 

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