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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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Spatial Modeling of Flood Sea Tides (Case Study: East Coast Semarang) Marfai, Muhammad Aris
Forum Geografi Vol 18, No 1 (2004)
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Abstract

The aims of this research are 1) to construct a spatial model of tidal flood hazard, 2) to do hazard analysis of tidal flood. Spatial modelling has been generated using Geographic Information System (GIS) software and ILWIS software was seleccted to do the model operation. Neighborhood function and digital elevation model (DEM) have been applied on the modelling calculation process. DEM data was correted and menipulated using map calculation on the digital form. Tidal flood hazard analysis has been done by means of map calulation on the tidal flood hazard map and detail landuse map. Histogram and tabulation from the result of the map calculation have been analyzed to identify the impact of the tidal flood hazard on the landuse. The highest impact of the tidal flood hazard occurs on the 1 meter of tidal flood level, where in the inundation occurs mainly on the fishpond and yard/ open space area.
Utilization of Groundwater, Spring, and the Surface Water for Drinking Water Service for the People of Surakarta PDAM Surakarta, Team
Forum Geografi Vol 14, No 1 (2000)
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Abstract

Case study: utilizing the groundwater, water resources, and surface of water to supply the drinking water for the inhabitants is Surakarta. Of the early target at 75%, the supply of drinking water for the inhabitants in Surakarta only achieves 44%. Because of this, the Regional Drinking Water ompany (PDAM) of Surakarta made a decision to: 1) utilize the debit of water production by making a deep well at a capacity of 30 liters a second for a short term, and on the basis of the study of water resource for Surakarta, for a long term; 2) minimize the water loss from 37% to 22%; and 3) fix and extend the network of distribution. In a comprehensive consideration, there are two alternatives to add the debit of water production water: 1) utilazing the water supply at 50 liters a second from Mount Lawu. However, this is not sufficient to supply the drinking water at a capacity of 200 liters a second; and 2) utilizing the water from Colo Dam with the IPA system. This can hopefully fulfill a lack of drinking water supply at 200 liters a second. However, utilizing the natural water from the groundwater must be continued to decrease PDAM’s supply.
Surface Water Hydrology Conditions in Alabio Polder for Irrigation Soewarno, Soewarno
Forum Geografi Vol 12, No 1 (1998)
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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.
The Role of Tourism in Regional Development (Case of Klaten District) Sujali, Sujali
Forum Geografi Vol 10, No 1 (1996)
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Abstract

The title of the reasearch is the role of tourism in regional development. This is a case study in Klaten regency because of the appearance and the activities on tourism to support the regional and national development. The purpose of this research are 1) to explore the potency, the spreads of regional tourism resorts; 2) to describe the supporting facilities to regional tourism towards the regional income and development. The data of this research are secondary data taken from the Regional Tourism Service Office, Regional Income Service Office, Agency for Planning of Regional Development, and the related department. The data are also taken from the interview of outstanding persons. The method of analysing the data is relative descriptive analysis supported by tendency analysis gained from time series data.Demand and supply approachs are used to develop the tourism. Based on the data we an know the profiles of the tourists. The tend to visis (the tourism of) entertainments. Most tourists are adult and old. The greatest resource of the Original Regional Income (PAD) is from local retribution. This include the income from (the tourism of) entertainments and recreation which have low contribution. The role of tourism in Klaten regency should be kept increasing to support the Original Regional Income and development. To keep the tourism inreaseing the supported capital, engineering, and skills from the developers are badly neede. It is important to increase the role of Tourism Service and managing the tourism. It an be concluded that tourism hasn’t improved yet the regional income and economy. That is why the tourism should be kept increasing.
Comparison of Stream Characteristics of Forested Subwatershed and Deforested Watershed in Mangunan Area, DIY Sudarmadji, S
Forum Geografi Vol 5, No 1 (1991)
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Abstract

Land use changes from forested  into unforest catchment result negative effects to the environment, including to the hydrological and soil condition of the area. To improve the hydrological and soil conditions serious attemps are required, and they take a long period to realize. The Mangunan Girirejo area (which is located in the Bantul regency, Yogyakarta Special Province) is one of pilot projects managed by the Gadjah Mada University. Among it’s activities the project tried to improve critical land by reforesting the area with  some kinds of plant. From the hydrological points of view this attemps should be evaluated, by comparing runoff from two adjacent catchments having similar conditions expect those on the land use. One of them is forested catchment, while the other is unforest catchment. The study  was conducted in the Mangunan Girirejo area using two small subcatchments. The forested subccatchment used for the study having an area 2.225 hectares. The forested subcatchment in now mostly covered by the pinus mercusii, acacia auliculiformis and malaleuca leucacendra, while the unforested subcatchment is used for the dry field ultivation, and dominantly casava, beam, and corn were planted in the subcatchment. About three month was needed for observing hydrological parameters (from January to March 1993). During the research some hydrological component such as rainfall, overlandflow, seepages, and runoff were observed. Rainfall in the study area generally  having less than 100 mm depth, falling in shorter than 4 hours duration. As an input in the hydrological system of the subcatchment, the rainfall did not always result runoff. In the forested subcatchment rainfall did not always result runoff. In the forested subcatchment rainfall higher than 10 mm depth result runoff, while in the unforested subcatchment the 5 mm rainfall is concidered as minimum rainfall to result runoff. The runoff hydrolographs of the two subcatchment having different characteristics. Although they have quick rise, the time of rise in the unforested subcatchment is shorter that those to the forested subcatchment. The hydrographs of the forested subcatchment have lower peaks than the unforested subcatchment, however the time base of hydrographs in the unforested subcatchment are longer. Chemical substances those which dominated the rock forming minerals (Ca, Mg, Na, K, HCO3, SO4, and SiO2) significantly increased from rainfall to runoff. The highest concentration found in the surface runoffand seepages. However if the one compared the concentration of the chemicals in the water originated from forestsed and underforested watershed he may say that the concentration of the chemical in water from unforested subcatchment is generaly higher than those from the forested subcatchment is generaly higher than those from the forested subcatchment. Runoff draining from unforested subcatchment having a higher SO4 and PO4 concentration sompared to those originated from forested subcatchment. The high concentration of the substances may bee caused by use of fertilizer by farmers in the unforested subcatchment.
Flood Modelling of Banjir Kanal Barat (Integration of Hydrology Model and GIS) Marfai, Muhammad Aris
Forum Geografi Vol 17, No 1 (2003)
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Abstract

Hydrological modelling has an advantage on river flood study. Hydrological factors can be easily determined and calculated using hydrological model. HEC-RAS (Hydrological Engineering Centre-River Analysis System) software is well known as hydrological modelling software for flood simulation and encroachment analysis of the floodplain area. For spatial performance and analysis of flood, the integration of the Geographic Information Systems (GIS) and hydrological model is needed. The aims of this research are 1) to perform a flood encroachment using HEC-RAS software, and 2) to generate a flood hazard map. The methodology for this research omprise of 1) generating geometric data as a requirement of the data input on HEC-RAS hydrological model, 2) Hydrological data inputting, 3) generating of the flood encroachment analysis, and 4) transformation of flood encroachment into flood hazard map. The spatial pattern of the flood hazard is illustrated in a map. The result shows that hydrological model as integration with GIS can be used for flood hazard map generation. This method has advantages on the calculation of the hydrological factors of flood and spatial performance of the flood hazard map. For further analysis, the landuse map can be used on the overlay operation with the flood hazard map in order to obtain the impact of the flood on the landuse.
New Settlement Areas at Forbiden Zone of Merapi Volcano (Case at Srumbung, Magelang) Ritohardoyo, Su
Forum Geografi Vol 14, No 2 (2000)
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Abstract

One of the chronicle problem in the disaster control of volcano eruption is the resettlement of relocated or transmigrated people to prohibitive region of the volcano. The more serious problem is happened when some of the labourers sand and stone mining living in those prohibitive region. Starting from those stated sttlement problem, this research aims at exposing the change, process, and continuity of setlement in the prohibitive region. This study employs so called sampling technique. Quota sampling is carried out according to village type. Two agricultural and mining village types in the prohibitive region are selected representing the sampling areas, encompassed administrative divisions of Srumbung subdistrict. The number of respondents are 60 households, selected unproportionally based on the village type. Primary data is collected diret communication with informants are key persons. Data analysis employs frequenccy and cross tabulation, and t test analysis. The study reveals that settlement changes in prohibitive region of Merapi vulcano has been fluctuatively recorded since 1006 based on the strength of Merapi vulcano eruption. However intensively settlement changes as an impact of the Merapi vulcano eruption have been recorded sine 1930 up to 1975 followed by more than 1742 people be dead as a victims and environment deterioration. The eruptions in 1954 and 1969 have resulted in drastically changes of physical and administrative condition village of Kaligesik and Gimal. At least 9 hamlets in both villages have been destroyed by ‘nue ardente’ and cold lava. Those eruptions have than change the administrative status of villages to be. Resettlement process within two hamlets in prohibitive region have taken place due to differences in origin area of the shelter, motivation to settle, and settlement pattern. Those two settle in mining villages are mining are mining labourer and mostly comes from outer subdistricts or districts, whereas those who stay in agriculture village are local people. The latter mostly joined transmigration program, which are supposed to stay in outer islands. A part from origin area, the difference of two settlers is also indicated by motivation. Economic motives are more dominant for those who settle in mining village than those who settle in agriculture village. The latter tend to have social motives to stay. The difference in settlement pattern between the vilages lays in ‘intermediary settlement’. This means that mining settlers have previously stayed in transmigration area. The duration to stay is between 15 to 20 years as compared to  mining settlers whose duration to stay are between 5 to 10 years. Although the average household monthly inome  in the respective two vilages is relatif the same (i.e. Rp 323,366 in Kaligesik and Rp 335,557 in Sumberejo), the physical condition of housing in Sumberejo look a little better than in Kaligesik. Despite the respective differences, people in the two villages tend to stay permanently. This means that the effort to vacant these prohibitive region will become more difficult.
Mapping Social and Economic Vulnerability in Forest and Peatland Fire Disaster in Bengkalis Regency, Riau Province Riyanto, Eko Ahmad
Forum Geografi Vol 29, No 1 (2015): Forum Geografi
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The aims of this research are (1) analyzing social and economic vulnerability of forest and peat land fire disaster in Bengkalis Regency; (2) Mapping social and economic vulnerability of forest and peat land fire disaster in Bengkalis Regency.  Research Variable is social and economic vulnerability. The data that used is primary and secondary data with survey method. Analysis method is scoring and weightings. After that classified based on the value of the score to determine the level of vulnerability. The analysis based on the head of National Agency for Disaster Management (Perka BNPB) Number 02.2012 and literatures study. The results of research show that social vulnerability of forest and peat land fire in Bengkalis Regency is medium vulnerability because it has value of social vulnerability is 0.46663. While economic vulnerability in Bengkalis Regency is low vulnerability because economic vulnerability is 0.3333. In addition, required mitigation that is quick and appropriate by governments of Bengkalis Regency and the local community in management of forest and peat land fire disaster.
Characteristics of Urban Poverty Case Study in Sangkrah, Surakarta City Astuti, Wahyuni Apri
Forum Geografi Vol 12, No 2 (1998)
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This research was intended to analyze on the characteristics of a poor household. The number of respondents in this research was 68 respondents who consisted of the poor households. The  what their characteristics were. To analyze data, the researcher used a descriptive analysis with the concentration on understanding from the researched community. This research made an effort to implement a poor community based approach in the urban area including understanding problems, and characteristics with the method of the poor community based participants. The result of this research indicated that the characteristics of the poor household included: their job was subject to changing the season and dependent on consumer’s need and want, a tendency to deviate from a law, the old and housewives and were involved to make a living, spending an inappropriate income, their survival dependend on the other people; their children were uneducated; they had not got a house and rented the house for a long time; and they could merely utilize the limited social failities.
Peranan Kota Kecil dalam Pengembangan Wilayah Musiyam, Muhammad
Forum Geografi Vol 10, No 2 (1996)
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Abstract

Tulisan ini berusaha untuk mengidenfitikasi peranan kota kecil (small towns) dalam pengembangan wilayah, terutama wilayah pedesaan. Bahasan dimulai dari pertama, konsep keterkaitan; kedua pendekatan peranan kota kecil dalam pengembangan wilayah pedesaan, dan diakhiri dengan bahasan megenai pendekatan saling ketergantungan antara kota kecil dengan pedesaan. Pengetahuan mengenai keterkaitan dapat membantu dalam mengidentifikasi sifat dan dampak interaksi antar kegiatan ekonomi. Secara teoritis, keterkaitan baik antar sektor maupun dalam sektor dapat terjadi melalui berbagai cara. Keterkaitan secara vertikal, yakni keterkaitan yang tercipta karena kerja sama atau hubungan antara perusahaan kecil dengan perusahaan besar. Keterkaitan dapat terjadi pula melalui keterkaitan konsumsi (consumption linkages) dan keterkaitan produksi (production linkages). Bentuk keterkaitan lainnya adalah keterkaitan keruangan, yang mencerminkan luasnya pengaruh sebuah perekonomian dan sebagai petunjuk adanya interaksi ekonomi antar wilayah. Berdasarkan pada serangkaian kajian mengenai keterkaitan desa kota, setidaknya ada dua hal yang perlu diperhatikan. Pertama, pertumbuhan kegiatan sosial ekonomi di pedesaan dan kota kecil merupakan dua hal yang saling bergantung. Oleh karenanya, kajian mengenai keterkaitan desa – kota disamping perlu dilihat dari perspektif kota, juga perlu dilihat dari pespektif desa. Kedua, keterkaitan desa – kota, di samping bervariasi antara wilayah satu dengan lainnya, secara internal juga menunjukkan variasi keterkaitan antar kelompok masyarakat, tergantung dari konteks regional, ekonomi, dan sosial. 

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