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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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Tipologi Pedogeomorfik Longsorlahan di Pegunungan Menoreh Kabupaten Kulonprogo Daerah Istimewa Yogyakarta Priyono, Kuswaji Dwi; Sunarto, S; Sartohadi, Junun; Sudibyakto, S
Forum Geografi Vol 25, No 1 (2011): July 2011
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v25i1.5035

Abstract

Pedogeomorphology tipology was applied in this research to determine the occurrence of landslide in the Menoreh Mountains, Kulonprogo District, Yogyakarta Special Region. The research aimed to know (1) soil characteristics where landslide events occurred in the research area, (2) characteristic of landslide prone landform in the research area, and (3) typology pedogeomorphic of landslide events in the research area. Pedogeomorphologic approach was represented through the steps of mapping the occurrence of landslides and landform, soil profile pedogenitic analysis and geomorphologic analysis at the point of occurrence of landslide. The results show that landforms characteristic on the occurrence of landslide with slope 16-75%, elevation 210-807 m dpal, weathered zone depth 25-80 cm, and the position of contacts on the opposite slope is flat and parallel. The soil characteristics on the occurrences of landslides have a 20-186 cm soil depts with the content 21,50-95,00% of caolinite clay, and clay content ratio between horion A dan B 0,22-0,91. Pedogeomorphic typology landslides prone classified into 3 levels, namely: low, moderate, and high level of vulnerability. The low level are indicated by the thickness of soil depth 0,60, slope < 25%, elevation 120 cm, caolinite clay content >70%, clay content ratio of A and B horizon < 0,40, slope >60%, elevation >600 m dpal, the depth of weathered zone > 60 cm, and the position of field contact against the slopes is parallel.
Applied Multitemporal Image and Geography Information System to Analyze Region Potential in Part of Slump of Jebres Subdistrict in Surakarta Rindarjono, Moh. Gamal
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.v16i1.413

Abstract

This research is aimed at detecting the areas having potential to be the slums by looking at the decrease of population index and physical environment from year to year. In this way, a model of analysis for the area with the potential of being slummed can be resulted.The research was conducted in some parts of Jebres Subdistrict in Surakarta Municipality by employing qualitative method approach. There were two types of data used in this research. The first were prime data inform of black and white Panchromatic aerial photographs with the scale of 1 :5 O00 at the year of 1982, and small format colorful anchromatic aerial photographs at the year of 1992. The second were secondary data related to the population condition i.e. demography, economy, health, social and culture, as well as physical environment covering water and land for 20 years (1982 j 2000).All the data in this research were analyzed by Geographical Infiormation Systems at arc Info. The final result of the research showed that based on the 1982 black and white Panchromatic aerial photographs, slum areas did not exist at all. Meanwhile, based on the 1992 small format colorful Panchromatic aerial photographs with the scale of 1:5 000, 140.882 hectares of slum areas were found at jagalan and Gandekan Villages. Overlay from the maps of quality development in dwelling area and the decrease in environment index produced a map showing the area with the potential of being slummed covering 240.14 Hectares.
Pencemaran Air Tanah di Perkotaan Priyana, Yuli
Forum Geografi Vol 5, No 2 (1991): December 1991
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v5i2.4679

Abstract

Air merupakan kebutuban hidup bagi manusia, baik sebagai mahkluk hayati maupun untuk kehidupan sehari-hari (MCK), irigasi maupun industri. Sebagian dari kebutuhan tersebut diambilkan dari air tanah. Dengan semakin meningkatnya jumlah penduduk terutama di perkotaan secara tidak langsung akan berpengaruh terhadap persediaan air tanah yang ada baik kualitas maupun kuantitas. Pengambilan air tanah yang terus meningkat dan melebibi save yield pada daerah pantai akan mengakibatkan intrusi air laut yang mengakibatkan air tanah menjadi asin. Demikian juga semakin banyaknya limbah yang dibuang oleh manusia ke dalam tanah baik limbah rumah tangga maupun industri akan mrngakibatkan pencemaran air tanah. Pada umumnya limbah yang berpengaruh terhadap air tanah di perkotaan adalah limbah rumah tangga (MCK) maupun limbah industri. Pengotoran atau kontaminasi air tanah ini akan berbahaya pada manusia yang telah meminumnya. Oleh karena itu dalam pemanfaatan sumber daya air tersebut hendaknya dapat dimanfaatkan clengan sebaik-baiknya dan dijaga kelestariannya.
Benefit Evaluation of Human Settlements Development Funded by SPL JBIC INP-23 in Indonesia Sunarhadi, Muhammad Amin
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.v18i1.600

Abstract

The Government of Japan and the Government of Indonesia has signed a loan agreement Sector Program Loan (SPL) INP 23 for Settlement Sector (Human Settlement) through the Japan Bank for International Cooperation (JBIC) which is intended to overcome the economic crisis and its impact in Indonesia since 1997. Research this carry out an evaluation of the benefits of settlement activities that have been implemented in order to know how much contribution the benefits of the settlement Sector program implemented through the SPL IVI-23, both the recipient community, relevant agencies that manage the project, and local governments that implement and oversee the development of the project . The survey was conducted by using a regional approach, ex post facto, and institutional. The selection of cities and counties samples were selected based on three things: the completeness of the program, the amount of funds, and the number of packets. Next, the results of the rank- ings were selected based on 1) the highest ranking, middle, and low; 2) distribution based on the distribution of the three parts of Indonesia, the western, central, and east; and 3) exclude conflict areas. The results showed that in general the development and results of settlement construction is quite beneficial for the government and society. Among other things more organized neighborhoods, neighborhoods healthier, improved infrastructure, and increased mobility of society. Special benefit shows the influence of the change in service, use of services, and its impact. Development of clean water service level (L) is satisfactory, the level of use (U) range in the level of useful and very useful, and beneficial impact. Drainage construction provide the level of service (L) is very satisfactory, the level of use (U) ranged between levels is useful and very useful, and beneficial impact. For the construction of basic infrastructure settlement (IS and hi, i) provide the level of service (L) is very satisfactory, the level of use (U) range from useful to extremely useful, and gives effect (B) is useful.
Adaptive Capacity Mapping of Semarang Offshore Territory by the Increasing of Water Level and Climate Change Suhelm, Ifan Ridlo
Forum Geografi Vol 27, No 1 (2013): July 2013
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v27i1.5084

Abstract

Tidal inundation, flood and land subsidence are the problems faced by Semarang city related to climate change. Intergovernmental Panel on Climate Change (IPCC) predicted the increase of sea level rise 18-59 cm during 1990-2100 while the temperature increase 0,6°C to 4°C during the same period. The Semarang coastal city was highly vulnerable to sea level rise and it increased with two factors, topography and land subsidence. The purpose of this study was to map the adaptive capacity of coastal areas in the face of the threat of disasters caused by climate change. The parameters used are Network Number, Employee based educational background, Source Main Livelihoods, Health Facilities, and Infrastructure Road. Adaptive capacity of regions classified into 3 (three) classes, namely low, medium and high. The results of the study showed that most of the coastal area of Semarang have adaptive capacities ranging from low to moderate, while the village with low capacity totaling 58 villages (58.62%) of the total coastal district in the city of Semarang.
Hydrological Characteristics of Kaligarang Watershed Soewarno, Soewarno; Yuningsih, Srimulat
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.v14i1.454

Abstract

This paper is a result of research concerning hydrological characteristic in the Garang Catchment Area. At present tha catchment area is often facing the problem of flooding in the dense populated area with cause a lot of loos in Semarang City. This research is aimed at studying hydrological harateristic in the Garang Catchment Area. Hydrological data are obtain from direct measurement at the stream gauging stations in the Garang Catchment Area and collected from Balai Hidrologi Office at Pusat Litbang Teknologi Sumber Daya Air in Bandung and from Hydrological Unit of Central Java Province. From this research were known the rainfall depth, their distribution and their return period; runoff coefficient; streamflow volume; dependable flow; flood discharge characteristi; and minimum discharge. From the some occuring flood indicates of the runoff coefficient is about 0.70. The water volume wasted to the sea is about 195 million m3/year. Yearly average of the dependable flow at stream gaunging stations: Garang – Pajangan  is about 2.28 m3/sec; Garang – Patemon is about 0.92 m3/sec and Kreo – Pancur is about 1.26 m3/sec. Yearly mean of annual flood discharge at Garang – Pajangan is about 435 m3/sec. The maximum capacity of river channel is about 485 m3/sec. The flood discharge characteristic are as follows: time of travel of flood is generally one km/hour approximately, rising time is about 3 hours and time of recession is about 6 – 11 hours. The floods, they are generally occur at the night. Flush flood of 1022 m3/sec occured on January 26, 1990 is estimated on 50 year return period, with 15 year return period of rainfall. The range of minimum discharge is about 0.43 – 3.15 m3/sec. The maximum discharge is about 47.2 – 1118 times of the minimum discharge. Design of the dam in Kreo River at Jatibarang and Kripik River at Mundingan, also increasing of the reforestation area in the upstream catchment are an alternative to reduce the Garang River peak flood.
Penggunaan Data Penginderaan Jauh dalam Perencanaan Pembangunan Permukiman Transmigrasi Wagiran, W
Forum Geografi Vol 8, No 2 (1994): December 1994
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v8i2.4823

Abstract

Ada banyak tahap yang harus dikerjakan dalam program perencanaan pemungkinan transmigrasi. Tahap awal dari kegiatan ini adalah menentukan area untuk lokasi transmigrasi. Informasi fisik area terse but dapat diperoleh dari data penginderaan jauh, baik citra satelit maupun foto udara. Tidak semua tahap dalam kegiatan ini memerlukan data bantu foto udara. Tahap yang memerlukan data bantu foto udara adalah tahap: perencanaan jangka panjang, perencanaan jangka menengah, "SKPT" dan "RTKIM".
Spatial Pattern of Bathymetry in Wangi-Wangi Island and Its Surrounding Based on GEBCO Data and Nautical Map Yulius, Yulius; Salim, H L; Ramdhan, M
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.v29i2.1113

Abstract

The study aims is to define bathymetry based on General Bathymetric Chart of the Oceans (GEBCO) and Nautical Map using GIS technique. The methods used in this study are the kriging method which combines the spatial correlation among the data using GIS and Remote Sensing software. The result shows that bathymetry at research area can be divided into five classes, these are: (1) 0-2 meter with area of 1.797,61 hectare, (2) 2-5 meter with area of 2.059,06 hectare, (3) 5-10 meter with area of 1.184,02 hectare, (4) 10-25 meter with area of 3.025.00 hectare, (5) 25-200 meter with area of 5.648.62 hectare.The spatial pattern of bathymetry dispersed from the shallow water at the edge of beach and more deep at the offshore, except at the eastern side of Wangi-Wangi island which has barrier reef and created basin between them.
The Influence of Cultivation System on Distribution Profile Of 137cs and Erosion / Deposition Rate Suhartini, Nita
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.v21i1.1821

Abstract

137Cs radiogenic content in the soil can be used to estimate the rate of erosion and deposition in an area occurring since 1950’s, by comparing the content of the 137Cs in observed site with those in a stable reference site. This experiment aimed to investigate the influence of cultivation type on distribution profile of 137Cs and distribution of erosion and deposition rate in cultivated area. A study site was small cultivated area with slope steepness <10o and length 2 km located in Bojong – Ciawi. For this purpose, the top of a slope was chosen for reference site and three plot sites were selected namely Land Use I that using simple cultivation, Land Use II that using simple cultivation with ridge and furrow, and Land Use III using machine cultivation. The results showed that cultivation could make a movement of 137Cs to the deeper layer and ridges and furrows cultivation system could minimized an erosion process. The net erosion and deposition for land Use I, II and III were -25 t/ha/yr , 24 t/ha/yr and -58 t/ha/yr, respectively.
System Dynamic Approach to Support Decision in Maintaining Water Availability (Case Study in Aek Silang Sub-Watershed, the Lake of Toba) Sihotang, Irwan Valentinus; Sudarmadji, S; Purnama, Ig.L. Setyawan; Baiquni, Muhammad
Forum Geografi Vol 30, No 2 (2016): December 2016
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v30i2.2719

Abstract

Water availability is immensely affected by the correlation among land use change, rainfall change, and population growth. One of analysis tools to discover how the correlation goes on in a hydrological process is by dynamic modelling approaching. The dynamic modelling result can be used for a substructure in decisions making as supports to maintain water availability for fulfilling domestic needs, agriculture, and Micro-Hydro Power (MHP). The aims of this study are to evaluate water availability as a long-term impact on land use change, rainfall change, and population growth with dynamic modelling and as a scenario which is required as basic information to make decisions in maintaining water availability. Analysis method which is applied in this study is dynamic modelling to long term evaluate water availability and validate using Mean Average Percentage Error method (MAPE). The analysis showed that the combination of rainfall of 2312.09 mm/yr, rainfall intensity of 0.340 mm/h, population growth rate of 7.23%, declined forest area of 1.513 ha/yr, declined shrub/unproductive land of 318.113 ha/yr, increased agricultural land of 7.627 ha/yr, and increased settlement area of 0.473 ha/yr, yielded the estimation of the fail in sustaining water sources in 2090 or the next 79 years from 2011 since the water deficit has reached approximately 3,249,881.02 m3. The value of validation modelling with MAPE method is 8.90, it is a dynamic modelling which is managed nearly the same with actual condition.

Page 39 of 121 | Total Record : 1205

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