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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 16 Documents
Search results for , issue " Vol 12, No 1 (1998)" : 16 Documents clear
Dynamics Process of Geomorphology at North Coast of Java between the river and the river Pemali Cisanggarung Brebes Central Java Priyono, Kuswaji Dwi
Forum Geografi Vol 12, No 1 (1998)
Publisher : Forum Geografi

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Abstract

This research was carried out in the Coastal Area of North Java, District Brebes, Central Java. It aims at finding the mechanism of factor that influence the dinamics of coastal geomorphological process and the distribution of the dynamics of the geomorphological process. The primary data consist of coastal forms, coastal building/ human activity, sea current, and distribution of the coastal sediment were collected by field observation and measurement. The secondary data consists of the climate, wave, bathimetry, tide, and regional sea current were collected from the related institutions. The technique of data analysis includes Beaufort Scale is employed to find out the characteristics of wind and wave. The laboratory analysis is used to find out the distribution of the coastal sediment. The discriptive analysis is used to desribe the sea current, tide, bathimetry, and human activity.The outcome of this research indicates that Mousoon wind making waves and longshore current can transport sediments which come from Cisanggarung and Pemali river. The small range tide (95 cm), the fine coastal sediment (clay), the shallow bathimetry (0 – 5 m), and human activity (building coastal pand) to provoke the dynamical changing of coasline. The dynamics of the geomorphologycal process from 1944 to 1964 indicates that the coastal area progressed dynamicly; from 1964 – 1997 indicates that the some coastlines (location 1, 4, 5, and 6) progressed, some coastline (location 2, 3, 7, and 8) regressed, and some coastlines (between location 3 to 4 and location 6 to 7) were relativelly stable.
A concept of Surveying and Mapping Vulnerability and Flood Hazard (with Hydro-Geomorphological Approach) Dibyosaputro, Suprapto
Forum Geografi Vol 12, No 1 (1998)
Publisher : Forum Geografi

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Abstract

The general event of natural process phenomena on lowland areas is flood as an effect of the overtooping stream water over natural levees and inundate the area of surrounding the river. Most of the lowland surround the rivers is used by man for settlements, agriculture land, high way, and other activities to support their life intensively. Therefore flood is not only the physical phenomena but also a socio – economic phenomena. One of the way to understand the spatial distribution of flood prone areas an be done by means of survey and mapping of the flood susceptibility and hazard using an hydro- geomorphological approach. The fluvial landform units on the lowlands reflect the effet of the geomorphological and hydrological processes in the past. Therefore those phenomena can be applied to explain the recent flood characteristics such as inundation  area, depth and flood duration, as well as flood frequencies and sources of floods. This explanation can be used as the starting point of the existing information which an be used as a basic survey and mapping of the flood suspectibility and hazard. The exiting of the interaction between man and natural event (flood) information, can also be applied as a fundament to define the hazard levels of every landform units own flood susceptibility levels.
Rural Depopulation Pattern at Yogyakarta Special Province (DIY) Baiquni, M; Muta’ali, Luthfi
Forum Geografi Vol 12, No 1 (1998)
Publisher : Forum Geografi

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Abstract

Rural population in Yogyakarta Special Province (DIY), in the last two decades, have shown dramatical changes in its quantity and quality. Depopulation is one of the interseting hanges which may considered as unique in term of its spatial distribution. Rural depopulation is a nebulous phenomenon which many factors, actors, and other  phenomenon are involved in shoping depopulation. It is related to socio – economic hanges such as a) shifting economic structure and labour in rural areas from agricultural to non – agriculture sectors; b) growing urban economy leads by industry which may creates employment opportunities and adsorb labours or migrants; c) improving social development related to technological innovation, accessibility and resource availability. Besides the sicio – economic factors, physical geographycal factors may influence to depopulation pattern.This paper is based on a secondary data research i.e. statistical data at rural levels in Yogyakarta, thematics maps and other documents. Statistical methodes and map pattern analysis are employed to analysis data. The result of this research are as follows: a) the rural depopulation in DIY can be found in 189 rural areas of 393 rural areas (48.09%); b) the spatial distribution of the rural depopulation are in Gunung Kidul District (80 rural areas), Kulon Progo District (59 rural areas) Sleman District (33 rural areas), and Bantul District (17 rural areas); c) the rural depopulation in Yogyakarta at least related to six factors whih have been identified as out – migration, local resources, carrying capacity, geographycal location or accessibility, rural infrastructure, and service availability.
Potential Landuse and Food Production in Watershed Progo Ritohardoyo, Su
Forum Geografi Vol 12, No 1 (1998)
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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.
Urgensi Aspek-Aspek Sosial dalam Kajian Dampak Lingkungan Hardjono, Imam
Forum Geografi Vol 12, No 1 (1998)
Publisher : Forum Geografi

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Abstract

Segala aktivitas masyarakat memiliki dampak positif dan negatif, dampak tersebut harus tidak menganggu keharmonisan hidup masyarakat. Aktivitas atau suatu usaha kegiatan selalu berubah-ubah dan sekaligus dihadapkan pada dinamika masyarakat yang merupakan aspek-aspek sosail. Padahal aspek-aspek sosial memiliki peran yang penting dalam kajian dampak lingkungan. Aspek-aspek sosial yang dikaji dalam analisa dampak lingkungan meliputi komponen-komponen yang terdiri dari variabel-variabel, seperti demografi, ekonomi, dan budaya. Variabel aspek-aspek sosial ini ternyata tidak kalah pentingnya dengan analisis dampak lingkungan dalam pengertian aspek fisik.
The Development of Geographic Information System Santoso, Sugiharto Budi
Forum Geografi Vol 12, No 1 (1998)
Publisher : Forum Geografi

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Abstract

Early geographyc information systems facused on processing attribute data and geographic analysis, and had only rudimentary graphic and mapping capabilities. Phenomenal increase in computer processor speed and power in 1970s and 1980s had a major influence on GIS development. By the late 1980s, the technologies of the three main types of geo-based system had merge to various degrees. Most systems today offer powerfull capabilities for graphic production, processing of attributes, and analysis
Application of Remote Sensing and GIS for Monitoring and Evaluation of the Reforestation Activities in Kupang district of East Nusa Tenggara Nahib, Irmadi; Wijaya, Jaya
Forum Geografi Vol 12, No 1 (1998)
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Abstract

To support reforestation activities, spatially forestry data are inexorably needed to support the activities. By using multi –temporally data, reforestation activities an be identified and detected. To accomplish the purpose, this research uses Landsat TM data aquired in 1990 and 1995. Remotely sensed data and Geographyc Information System (GIS) are methods that can be applied to gather, monitor as well as analyse data swiftly and accurately. This research uses remotely sensed data to collect land cover features in given area. Geographyc information System is used to capture and to analyse reforestation data. The expected is GIS based forest management strategy making.
Surface Water Hydrology Conditions in Alabio Polder for Irrigation Soewarno, Soewarno
Forum Geografi Vol 12, No 1 (1998)
Publisher : Forum Geografi

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Abstract

The Alabio polder irrigation which area of 6000 ha is situated at the Negara river basin in Kalimantan Selatan province, consist of agricultural land which major part is approximately used for paddy-fields (60%), swamp zone (30%), and other (10%). During rainy season are usually flooded, which water level of 0,50 – 1,50 m above the ground surface. The flooding is due to the slight slope of the Alabio, Panggang, and Negara river. During field investigatiton period from Desember 1989 to Pebruary 1990, inflow discharge measured in the Tabukan intake was 14,9 – 17,1 m3/det, which water elevation was 2,62 – 2,74 m MSL, in Mahar intake was 0,52 – 2,67 m3/det, which water elevation was 2,94 – 3,25 m MSL. The outflow discharge measured in the Kalumpang drainage main canal was 1,68 – 17,1 m3/det, and in the Luang drainage canal was 13,62 – 16,92 m3/det. The Alabio Polder outside slope was 0,00011 – 0,00025, the inside slope was 0,00002 – 0,00010. The difference of water level elevations for the various discharge in the Alabio canals network is due back water in the downstream Polder area. Sedimentation was accour in the intake and drainage canals. The chemical analyze show that surface water meet to the standard for irrigation. The hydrologycal optimation and water balance study should be necessary.
Application of Remote Sensing and GIS for Monitoring and Evaluation of the Reforestation Activities in Kupang district of East Nusa Tenggara Nahib, Irmadi; Wijaya, Jaya
Forum Geografi Vol 12, No 1 (1998)
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v12i1.480

Abstract

To support reforestation activities, spatially forestry data are inexorably needed to support the activities. By using multi –temporally data, reforestation activities an be identified and detected. To accomplish the purpose, this research uses Landsat TM data aquired in 1990 and 1995. Remotely sensed data and Geographyc Information System (GIS) are methods that can be applied to gather, monitor as well as analyse data swiftly and accurately. This research uses remotely sensed data to collect land cover features in given area. Geographyc information System is used to capture and to analyse reforestation data. The expected is GIS based forest management strategy making.
Surface Water Hydrology Conditions in Alabio Polder for Irrigation Soewarno, Soewarno
Forum Geografi Vol 12, No 1 (1998)
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v12i1.485

Abstract

The Alabio polder irrigation which area of 6000 ha is situated at the Negara river basin in Kalimantan Selatan province, consist of agricultural land which major part is approximately used for paddy-fields (60%), swamp zone (30%), and other (10%). During rainy season are usually flooded, which water level of 0,50 – 1,50 m above the ground surface. The flooding is due to the slight slope of the Alabio, Panggang, and Negara river. During field investigatiton period from Desember 1989 to Pebruary 1990, inflow discharge measured in the Tabukan intake was 14,9 – 17,1 m3/det, which water elevation was 2,62 – 2,74 m MSL, in Mahar intake was 0,52 – 2,67 m3/det, which water elevation was 2,94 – 3,25 m MSL. The outflow discharge measured in the Kalumpang drainage main canal was 1,68 – 17,1 m3/det, and in the Luang drainage canal was 13,62 – 16,92 m3/det. The Alabio Polder outside slope was 0,00011 – 0,00025, the inside slope was 0,00002 – 0,00010. The difference of water level elevations for the various discharge in the Alabio canals network is due back water in the downstream Polder area. Sedimentation was accour in the intake and drainage canals. The chemical analyze show that surface water meet to the standard for irrigation. The hydrologycal optimation and water balance study should be necessary.

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