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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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Genesis Pedon Tanah yang Berkembang di Atas Batuan Karbonat Wonosari Gunungkidul Djoko Mulyanto; S Subroto P.S.; Herwin Lukito
Forum Geografi Vol 25, No 2 (2011): December 2011
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v25i2.5038

Abstract

The variation of soil color that developed on carbonate rocks which are generally white, very interesting to be studied. The aim of the study is to examine the formation of two pedons of black soil and red soil by hue 10 YR and hue 5 to 2.5 YR which successively developed on marly limestones and calcarenite. Analysis of mineral properties consist of the total minerals of sand fraction, clay fraction and rock powders. Soil chemical properties include: pH, organic C, exchangeable cations and cation exchange capacity, CaCO3, the amorphous-crystalline of Fe and Mn, the total of Fe and Mn, the analysis of physical properties is the texture of seven fractions. The results showed that the development of the red soil is much more developed than black soil that shown by intensively decalcification process of red soil that impact on the low of pH, base saturation and cation exchange capacity, whereas the development of black soil is inhibited. The formation of black soil is more inherited of clay bearing marly limestone after carbonate dissolution, whereas the red soil development through rubification and illuviation.
Spatial Correlation Between Land Development Level and Vulnerability Level of Mass Movement in the Watershed of Kayangan, Kulon Progo Regency, Yogayakarta Special Region Junun Sartohadi; Rina Purwaningsih
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.v18i1.596

Abstract

The objective of this research were: 1) to study the degree of soil development, and 2) to study the spatial correlation between the degree of soil development and the degree of mass movement susceptibility in the research area. The sampling method applied in this research was stratified sampling. Soil mapping units were applied as strata. The sample within strata was determined according the degree of mass movement susceptibility. The degree of soil development was determined using quantitative method of color indices and proflie index. The color indices were Buntley – Westin (B – W), Harden (H), and Hurst. The profile index was determined using solum, texture, structure, and soil consistency. The degree of mass movement susceptibility map was taken from PSBA UGM (2001). Spatial correlation between the soil development map and the mass movement susceptibility map was analyzed using “error matrix”. The result of this research indicated that the degree of soil development in the research area could be classified into three classes, i.e. class 1 (weakly develop soil); class 2 (moderately developed soil), class 3 (strongly developed soil). The degree of mass movement susceptibility was classified into three classes, i.e. class 1 (low susceptibility), class 2 (moderate susceptibility), and class 3 (high susceptibility). The result of error matrix calculation between mass movement susceptibility and soil development were 9.56%; 21.96%; 30.21% for BW + Ha, Hurst, and profile indices respectively. There values showed that there were low spatial correlations between the degree of soil development and mass movement susceptibility in the study area.
Ibnu Battutah dan Perkembangan Ilmu Geografi di Indonesia Sukendra Martha
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.v5i2.4681

Abstract

lbnu Battutah sebagai seorang geografiwan muslim dan pengembara dunia atau journey geografi mempunyai kemampuan hebat dalam mengbasilkan karya besar yang dikagumi oleh dunia Barat. Dengan perjalanannya, bagian wilayah Indonesia telah dikunjungi sebanyak dua kali yakni pada tahun 1345 dan tahun 1346. Oleh karena itu dalam perkembangan ilmu geografi di Indonesia, sumbangan Ibnu Battutah tidak dapat diabaikan begitu saja. Hal ini mengingat babwa Battutah, sebagai geografiwan tertentu telah mencatat hasil-hasil perpelancongan geografisnya di Indonesia, khususnya di Samudera Pasai, Sumatera. Sekilas tentang biografi Battutah dan sumbangannya terhadap Geografi Indonesia disajikan dalam makalah ini.
Social-Economics Integration of Dualistic Settlement Environment at Urban Areas in Indonesia (Case Study in Yogyakarta City) Muhammad Baiquni
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.v14i1.450

Abstract

Dualistic pattern of settlement is a new phenomena in some areas of Indonesian cities. Such phenomena may reate increasing tensions which lead to emerging potential onflicts among different groups. In managing such potential conflicts, it is important to study many aspects of dualistic settlements, not only in term of physical spatial pattern but also socio-economic pattern in various strate as well as various location in the urban and it surround. This research is aimed at understanding the characteristic and process of emerging dualistic sttlements in Indonesia, further this research attempt to study the pattern and the forms of socio-economic integration of the community. The research approach is aimed at understanding the characteristic and process of emerging dualistic settlement in Indonesia, futher this research attempt to study the pettern and the form of socio-economic integration of the community.
Impacts of El Niño 2015 and the Indian Ocean Dipole 2016 on Rainfall in the Pameungpeuk and Cilacap Regions Martono Martono; Teguh Wardoyo
Forum Geografi Vol 31, No 2 (2017): December 2017
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v31i2.4170

Abstract

El Niño and the Indian Ocean Dipole (IOD) are oceanographic phenomena which occur in the tropical Pacific Ocean and the Indian Ocean due to air–sea interactions. These phenomena affect climate variability both regionally and globally. This study was conducted to understand the impacts of El Niño 2015 and IOD 2016 events on rainfall in the Pameungpeuk and Cilacap regions. The data used consists of the NIÑO3.4 index, IOD index, daily rainfall from 1987–2016, daily sea surface temperature from 1987–2016, daily sea surface height from 1994–2016 and pentad sea surface current from 2007–2016. The method used in this research was a descriptive analysis. The results have shown that rainfall in Pameungpeuk and Cilacap was influenced by El Niño 2015 and negative IOD 2016. During El Niño 2015 a decrease in rainfall occurred, whereas during negative IOD 2016 rainfall increased. Rainfall anomalies in the east season and the second transition season during El Niño 2015 in Pameungpeuk reached −107 mm and −374 mm; meanwhile in Cilacap rainfall anomalies reached −111 mm and −218 mm. Conversely, rainfall anomalies during negative IOD 2016 reached 109 mm and 360 mm in Pameungpeuk, and in Cilacap reached 293 mm and 365 mm. Changes in rainfall in Pameungpeuk and Cilacap during El Niño 2015 and negative IOD 2016 events were closely related to the weakening and strengthening of convections in the southern waters of Java.
Geospatial Assessment of Coseismic Landslides in Baturagung Area Aditya Saputra; Junun Sartohadi; Danang Sri Hadmoko; Christopher Gomez
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.v29i2.693

Abstract

Java, the most densely populated island in Indonesia, is located on top of the most seismically active areas in Southeast Asia: the Sunda Megathrust. This area is frequently hit by strong earthquake. More than 3,300 M5earthquakesoccurred between 1973-2014. The wide range of mountainous areas and high intensity of rainfall, make several part of the island one of the most exposed regions for coseismic landslides such as Baturagung area, the Southeast mountainous area of Yogyakarta Province. An integrated method between RS and GIS was used to conduct the vulnerability assessment due to the lack of the site specific slope instability analysis and coseismic landslides data. The seismic zonation of Baturagung area was obtained based on the analysis of Kanai attenuation. The geologic information was extracted using remote sensing interpretation based on the 1:100,000 geologic map of Yogyakarta and geomorphologic map of Baturagung area as well. The coseismic landslide hazard assessment has been estimated using scoring analysis in the GIS platform proposed by Mora and Vahrson (1993) with several modification. The accomplished coseismic landslide hazard map shows medium hazard coverage in the eastern areas, in the upper slope of Baturagung area, which consists of Semilir Formation. The result provides a distinct description of coseismic landslides hazard distribution in Batuaragung area. However, it should only be the preliminary assessment of the site specific investigation especially on valuable area or asset. 
Role of Water Resources in Determining Spatial Planning of Region Alif Noor Anna
Forum Geografi Vol 12, No 2 (1998)
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v12i2.473

Abstract

In planning a spatial order in a territory , it is necessary to take acount of three aspects of natural resources, human resources, and living environment. Based on the reality, so it is necessary  to think of two sides: potential human resources and environment and human resources. One of the resources that is absolutely needed by creatures is water. Concerning the spatial order, the water is greatly needed in a variety of life. As the other resources, the reserve of the water also get limited. Because of its limitation, it is necessary to control the potential water sources in a territory before determining a design of good spatial order. It means that in planning the spatial order must be based on the rule and regulation of preserving its resource.
Erratum: An Exploration of Food Insecurity, Poverty, Livelihood and Local Food Potentials in Kulon Progo Regency, Indonesia Dodi Widiyanto
Forum Geografi Vol 32, No 2 (2018): December 2018
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v32i2.7235

Abstract

This erratum aims to revise a mistake from the previous article (Widiyanto, 2018). The mistake is mainly about the presentation of a table for the Appendix 3, i.e. Local Food Production Potential. There was a mistake for the Ngestiharjo village Local Food Production Potential figure, particularly for the tuber/uwi (column 8th). The correct value for this is provided here.
Perubahan Permukiman Perdesaan Pesisir Kabupaten Gunung Kidul Daerah Istimewa Yogyakarta Tahun 1996-2003 Su Ritohardoyo
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.v21i1.1817

Abstract

One of the impacts of coastal region development is settlement change. Because of that, this article presents a result of research about changing of settlement land area, house buildings, settlement facilities since 1996 up to 2003, and several factors which influence to the changing. This research was carried out in 20 karst villages borders on Indian Ocean so-called coastal villages in of Gunungkidul Regency as analysis units. Data analysis employs so-called secondary data analysis method, using Village Potentials Cencus (PODES) data were published in Statistics Central Bureau. Data analysis employs frequency, cross tabulations, and statistical analysis. Result of this research shows that as long as 1996 up to 2003 the settlement land area increases on 0.24 % per annum on an average, while the house building number on 6.14 % per annum. Spatially several coastal rural villages are near or as a tourism object or as a district office locations are higher developing than the others of coastal rural villages. It means that the development of tourism objects as long as 1996 up to 2003 has influenced the coastal rural settlement development. Generally, the development of coastal rural settlement is significantly also influenced by thirteen of physical and socio-economical factors (R=0.903; Sig.=0.05). In detail however, among the 13th of physical and socio-economical factors are only five factors significant influence to the development of coastal rural settlement. The 5th factors are the average of place elevation, well number, propotion of agriculteral land area, household densty, and population density. Based on that findings in order to develope of coastal rural settlement especially in karst region, besides the development of tourism objects, the five factors should be taken in consideration.
Pengaruh Perubahan Penggunaan Lahan terhadap Sifat Biofisik Tanah dan Kapasitas Infiltrasi di Kota Malang Sugeng Utaya
Forum Geografi Vol 22, No 2 (2008): December 2008
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v22i2.4986

Abstract

Land use management causes the changes of the function of the land in the city. The change of the function of uncultivated land to be cultivated land has a potential to change soil biophysical characteristic, and at the same time, it decreases the absorption of soil water. This research aims: (1) to study the influence of the landuse change towards soil biophysical characteristics, (2) to study the correlation between soil biophysical characteristics and infiltration capacity, and (3) to study the influence of the landuse change towards the infiltration capacity. The landuse change is studied by comparing the ongoing mapping documents. Soil biophysical characteristics consist of root biomass, number of worms, soil organic matter (SOM), and porosity. The root biomass is obtained by root density, the number of worms is identified with monolith and hand sorting method, the SOM is identified with fraction analysis, and the porosity is identified with cylinder and pignometer method. The water absorption is measured with the plot experiment. The influence of the landuse towards soil biophysical traits is analyzed T-test and the influence of landuse change towards infiltration capacity is analyzed correlatively. This research gains the results that: (1) the landuse change causes the change of soil biophysical traits, too, and the soil biophysical traits change causes, furthermore, the declining of the land capability in absorbing water, and (2) the amount of the infiltration capacity is caused by soil biophysical traits, mostly by root biomass, number of worms, and the SOM, and (3) the landuse change causes the declining of infiltration capacity.

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