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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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Inventerisasi Hutan dengan Teknik Penginderaan Jauh Multitingkat Sugiharto Budi Santoso
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.v7i1.4796

Abstract

Hutan mempunyai peranan yang sangat penting dalam pembangunan berkelanjutan. Hutan tidak hanya mempunyai fungsi ekonomi tetapi juga mempunyai fungsi ekologi. Pengelolaan hutan harus dilaksanakan secara berkesinambungan agar terjaga dari kehancuran. Hal ini tak mungkin dapat dilaksanakan tanpa adanya kegiatan inventarisasi. Inventarisasi hutan dapat dilakukan melalui survai darat maupun dengan menggunakan teknik penginderaan jauh, atau keduanya. Dengan survai darat akan diperoleh infomasi yang akurat namun dalam pelaksanaannya memerlukan banyak waktu, biaya, dan tenaga. Dengan menggunakan teknik penginderaan jauh yang dibantu dengan survai darat akan diperoleh data yang relative lengkap dengan waktu, tenaga dan beaya yang lebih rendah.
Geographical Distribution of Dairy Cattle in Boyolali Yuli Priyana; Soenarso Simoen; Suyono Suyono
Forum Geografi Vol 13, No 1 (1999)
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v13i1.462

Abstract

The researcch about the geographic distribution of diary cattle breeders, is held in Subdistrict of Selo, Cepogo, Musuk, Boyolali, Mojosongo, Teras, and Banyudono, Boyolali regency. This research aims to investigate potential areas for dairy attle breeding and the physical factors (availability of groundwater, average temperature, altitude, accesibility) that contribute most to the density of cattle in the research site. In addition, it investigates the differences m water supply for dairy cattle breeding and the ratio of income to cost at every morphological units as well as the effect of the amount of water supply on milk production and the effect of the Ca content of groundwater on the density of dairy cattle. The methods use in the research is survey method. The data colleted in the research consist of 200 primary data of the respondents taken from head of dairy cattle breeders families using a questionnare. Secondary data are obtained from related agencies, reference books and other authorized source dealing with the research yopic. In order to find out the differences in water supply for dairy cattle breeding and the ratio of income to cost, a statistical measurenment with Anova test is carried out. A multiple regression test is used to find out the effects of the availability of groundwater, altitude, average temperature, and accesibility on the density of dairy cattle. A simple regression test is used to find out the effects of water supply on milk producctin and the Ca sontent of groundwater on the density of dairy cattle.The result of the research indicate that the research  site consist of four morphological units, namely the Volcanic slope, Volcanic foot, fluvio Volcanic foot, fluvio volcanic plain. The potential areas for dairy cattle breeding are situated at an altitude of 700 meters, temperature 17o C – 21o C especially the areas in the subdistrict of Selo and Cepogo. The result of the statistical test indicate that the most differences in the amount of water supply for dairy attle breeding as well as in the rasio between income and cost among morphological units. Water supply for dairy cattle breeding has no effect on milk production, whereas the Ca content of groundwater has no effect on the density of dairy cattle.
Distribution of Accuracy of TRMM Daily Rainfall in Makassar Strait G Giarno; Muhammad Pramono Hadi; Slamet Suprayogi; Sigit Heru Murti
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.v32i1.5774

Abstract

This research aims to evaluate rainfall estimates of satellite products in regions that have high variations of rainfall pattern. The surrounding area of Makassar Strait have chosen because of its distinctive rainfall pattern between the eastern and western parts of the Makassar Strait. For this purpose, spatial distribution of Pearson’s coefficient correlation and Root Mean Square Error (RMSE) is used to evaluate accuracy of rainfall in the eastern part of Kalimantan Island and the western part of Sulawesi Island. Moreover, we also used the contingency table to complete the parameter accuracy of the TRMM rainfall estimates. The results show that the performance of TRMM rainfall estimates varies depending on space and time. Overall, the coefficient correlation between TRMM and rain observed from no correlation was -0.06 and 0.78 from strong correlation. The best correlation is on the eastern coast of South West Sulawesi located in line with the Java Sea. While, no variation in the correlation was related to flatland such as Kalimantan Island. On the other hand, in the mountain region, the correlation of TRMM rainfall estimates and observed rainfall tend to decrease. The RMSE distribution in this region depends on the accumulation of daily rainfall. RMSE tends to be high where there are higher fluctuations of fluctuating rainfall in a location. From contingency indicators, we found that the TRMM rainfall estimates were overestimate. Generally, the absence of rainfall during the dry season contributes to improving TRMM rainfall estimates by raising accuracy (ACC) in the contingency table.
Total Suspended Load and Sediment Yield of Kayan River, Bulungan District, East Kalimantan Suprapto Dibyosaputro
Forum Geografi Vol 19, No 2 (2005): December 2005
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v19i2.4842

Abstract

This research was carried out the the drainage system of Kayan river, Bulungan District, East Kalimantan. The purpose of the research were to study the physical conditions of the Kayan catchment area, calculate the suspended sediment load, and to define the total sediment yield of Kayan River. Observation method were used in this research both of direct field observation as well as laboratory observation. Data acquired in this study were include of climatic data, geology, geomorphology, soil and land cover data. Besides also rain-fall data, temperature, river discharge and suspended sediment load. The total sediment yield were calculated by mean of mathematical and statistical analysis especially of linier regression analysis. The result of the research show that total the sediment yield of Kayan River with drainage area of 6,329.452 km² is about 236,921.25 m³/km²/year. The interesting result of the statistical analysis was that the existing negative correlation between river discharge and suspended sediment load. It is the effect of the location of discharge and suspended measurement. This condition caused by sea tide effect on river discharge at the apex delta. During high tide water river trend rising up on discharge but not on suspended sediment load. Instead, also existing setting down processes takes places of the suspended sediment load into the river bottom upper stream and the apex.
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.
Thematic Geovisualization of the Data Profile of Kaligesing, Purworejo, Central Java Sudaryatno Sudaryatno; Shafiera Rosa El-Yasha; Zulfa Nur'aini 'Afifah
Forum Geografi Vol 33, No 2 (2019): December 2019
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v33i2.8876

Abstract

The scientific field has a variety of purposes, one of which is the presentation of data and information which can be used by other parties to support their decision making. Moreover, the information is presented spatially. This research aims to map the data profile of Kaligesing district to establish the region’s potential through thematic geovisualization of its data profile, such as slopes, land use, livelihoods and population. The primary data were obtained from visual interpretation of remote sensing images to extract land use information, and DEM processing to extract slope information. Secondary data were provided by the Kaligesing district government. In order to build tiered spatial modelling, each thematic map was classified and weighted according to its contribution to the potential of the region. Based on this modelling, each village was given a compilation of weights, which were used as a basis for regional potential analysis. From the results of the thematic mapping, Kaligesing has three villages that have the potential for development in the agricultural, trade and service sectors, supported by the potential of human resources, and the abundant non-residential land available.
Radar Data for Identifying the Characteristics of Tropical Forest Stands Agus Wuryanta
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.v30i1.1501

Abstract

Radar is one of remote sensing technology which utilizes active electromagnetic energy and are able to provide information about the characteristics of forest stand. This study utilized JERS-1 and ERS-1 radar images to analyze the relationship between the radar backscatter and forest stand characteristics such as Diameter Breast Height (DBH), basal area, and canopy cover. This research was conducted in Jambi Province, Bungo Tebo District, Sumatra, Indonesia. The research site covered the forest concession, Suku Anak Dalam, the area adjacent to Pelepat and Batang Tebo River, and Kuamang Kuning village. Gamma Map Filter with 7 x 7 window size was applied to reduce speckle noise of the SAR images (ERS-1 and JERS-1). This study found out the positive significant correlation between basal area and DBH with JERS-1 radar backscatter (i.e., r = 0.75 and r = 0.70), while ERS-1 radar backscatter has correlation (r = 0.64) with the canopy cover.
Terrain Characterization and Soil Erosion Risk Assessment for Watershed Prioritization Using Remote Sensing and GIS (A case study of Nawagaon Maskara Rao Watershed, Saharanpur, India) Beny Harjadi
Forum Geografi Vol 23, No 1 (2009): July 2009
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v23i1.5001

Abstract

Soil erosion is crucial problem in India where more than 70% of land in degraded. This study is to establish conservation priorities of the sub watersheds across the entire terrain, and suggest suitable conservation measures. Soil conservation practices are not only from erosion data both qualitative SES (Soil Erosion Status) model and quantitative MMF (Morgan, Morgan and Finney) model erosion, but we have to consider LCC (Land Capability Classification) and LULC (Land Use Land Cover). Study demonstrated the use of RS (Remote Sensing) and GIS (Geographic Information System) in soil erosion risk assessment by deriving soil and vegetation parameters in the erosion models. Sub-watersheds were prioritized based on average soil loss and the area falls under various erosion risk classes for conservation planning. The annual rate of soil loss based on MMF model was classified into five soil erosion risk classes for soil conservation measures. From 11 sub watersheds, for the first priority of the watershed is catchment with the small area and the steep slope. Recommendation for steep areas (classes VI, VII, and VIII) land use allocation should be made to maintain forest functions.
The Role of Tourism in Regional Development (Case of Klaten District) Sujali Sujali
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.v10i1.517

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.
Management of an Underground River to Overcome Water Scarcity in the Gunung Sewu Karst Area, Indonesia Choirul Amin; Priyono Priyono; Arif Jauhari; Yuli Priyana; Kuswaji Dwi Priyono; Munawar Cholil
Forum Geografi Vol 31, No 1 (2017): July 2017
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v31i1.4502

Abstract

Since people living in a karst area periodically face a crisis due to a lack of fresh water, it is necessary to re-evaluate the ability to use water resources. An appropriate and effective management is required to use available water resource sustainably. We describe a management process of exploring underground river in karst region as water resources. The activities completed included four phases, namely exploration, pre-lifting activities, the water lifting and post-lifting activities. The exploration phase included speleological surveys and data collection for the cave mouth using remote sensing instrument. The pre-lifting was done to prepare various requirements before the lifting process was completed. The water lifting phase consisted of the construction of an underground river dam, the installation of submersible pumps, the construction of reservoirs and the installation of piping to connect to the public hydrant. The post-lifting phase was mainly conducted to organise water distribution evenly. This management model was evidenced to successfully overcome drought in Pucung village by providing fresh water to the local community. Moreover, this model promoted residents’ cost savings by reducing their expenses for buying water from IDR 50,000/m3 to IDR 3,500/m3 (1,300 percent).

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