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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
 82   83   84   85   86 
Karakteristik Kualitas Air Limpasan di Daerah Urban Sebagai Sumber Pencemaran Air S Sudarmadji
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.v5i2.4678

Abstract

Perkembangan daerah kota dapat memberikan dampak negatif pada kondisi bidrologi, baik pada air permukaan maupun air tanah. Perkembangan daerah kota juga didukung oleh pertambangan sarana transportasi serta prasarananya, yaitu jalan raya dan kendaraan bermotor. Perkembangan daerab permukiman di daerah perkotaan juga menyebabkan bertambahnya volume limpasan dan penurunan kualitas air. Penelitian yang mengarah kepada dampak terbadap kondisi hidrologi, khususnya pada kualitas air di beberapa negara di luar Indonesia dikaji, khususnya yang menyangkut kualitas air permukaan yang berasal dari daerah kota. Zat kimia yang terdapat di dalam air sudah ada sejak awal terbentuknya tetesan air hujan dan pada proses jatuhnya air hujan ke muka bumi. Terdapatnya inti kondensasi sudah menunjukkan masuknya zat lain ke dalam air hujan. Pada saat hujan jatuh ke muka bumi, berbagai macam gas terlarut di dalam air hujan tersebut. Air hujan yang jatuh di muka bumi melarutkan tanah batuan dan material lain yang ada di muka bumi, selanjutnya zat yang larut tersebut terbawa aliran air yang terbentuk. Di daerah perkotaan material di tanah pekarangan dan jalan raya merupakan sumber pencemar yang sangat berarti. Beberapa penelitian menujukkan bahwa air limpasan yang berasal dari daerah perkotaan, baik yang berasal dari jalan raya maupun dari pekarangan mempunyai kadar zat kimia yang cukup tinggi dan mempunyai potensi yang cukup sebagai pencemar bagi badan air penerima limpasan tersebut. Pencemar tersebut dilihat dari BOD, COD, kadar zat tersuspensi, kadar zat terlarut, klorida posfat, nitrat dan bakteri bentuk coli. Bahkan ada beberapa kadar logam berat seperti Pb yang terdeteksi pada limpasan ini. Mengacu kepada basil penelitian di luar negeri nampaknya penelitian di Indonesia semacam itu perlu pula dilakukan, mengingat babwa perkembangan kota di Indonesia pesat juga.
Decreasing of Participation of Youth in Agricultural Sector (Case Study at Delanggu Village, Delanggu, Klaten) Choirul Amin; Muhammad Farid Aminudin; Dilahur Dilahur; Priyono Priyono
Forum Geografi Vol 14, No 2 (2000)
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v14i2.447

Abstract

This study is carried out in Delanggu, Klaten, that has high productivity of rice but undergoing a decrease in the role of the sector of agriculture. The goal of this study is to observe young people departicipation in the sector od agriculture and fators that influence it. The method used is survey method. The population is all of the young people in Delanggu, 1.419 peoples. The sampling uses stratified proporsional quota sampling where respondents are divided into three groups of age, 15 – 19 years old, 20 – 24 years old, and 25 – 29 years old. Every sampling in eah group is taken 5% proportionally, with its homogenates consideration, while the characteristic, which has determined in order to fulfil the number of determined quota in each age group. Collected data is presented in the form of frequency and cross table. Qualitative data analysis uses logical thought, deducyive – inductive, analogy ang comparison, whereas analyzing frequency and cross table uses quantitative data analysis. The use of both analysis is adjusted to the data and goal of the study.
Study of Transportation Movement Generation in Bandung City by using QuickBird Imagery Remote Sensing and Geographic Information System Lili Somantri
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.v27i1.5083

Abstract

The objective of this study is to examine the transport movement generation in Bandung City by using QuickBird imagery remote sensing and Geographic Information Systems. The method used in this research is spatial approach by quantitative descriptive analysis. It resulted that the greatest movement generation come from the regular housing types of 3440 people per hour. The District with the greatest generation was Sub Ujungberung, i.e. 55,501 people per hour, whereas the highway with the greatest amount of generation is Soekarno-Hatta Street of 51,014 people per hour.
Lahar at Kali Konto after the 2014 Eruption of Kelud Volcano, East Java: Impacts and Risk Suprapto Dibyosaputro; Gilang Arya Dipayana; Henky Nugraha; Kartika Pratiwi; Hogy Prima Valeda
Forum Geografi Vol 29, No 1 (2015): July 2015
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v29i1.793

Abstract

Five days after the Kelud Volcano eruption of 13 February 2014, lahar occurred in several channels of the Volcano. Rainfall with intensity of 26 mm/hour mobilized pyroclastic material from the upper slopes of Kelud Volcano down the channel during 3.5 hour. Using this eruption as a case study, the aims of this paper are (1) to study the geomorphic impact of lahars and (2) to study future hazards and risks due to the potential of lahar source material and lahar repose area. To reach these two goals, we use both primary and secondary data. The primary data comprises an integration of remote sensing, GIS approach, and fieldwork control, in order to investigate the geomorphic impacts of lahars. Secondary data were collected through interviews and statistical approach in villages, in order to determine their perception to the risk of lahar. Morphogenic processes such as riverbank erosion, channel-widening and riverbed downcutting took an important role in generating the impact of lahar in Kali Konto. The medial and distal areas were affected more largely affected than the proximal area. This major impacts have been river widening and buried crop field inside of the channel. This result allowed us to provide recommendation to population living along those areas at risk, in order to be prepared against the eventuality of potentially large and destructive lahars.
The Influence of Madden–Julian Oscillation on Local-Scale Phenomena over Indonesia during the Western North Pacific and Australian Monsoon Phases Ida Pramuwardani; Hartono Hartono; Sunarto Sunarto; Ardhasena Sopaheluwakan
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.v32i2.6226

Abstract

In this study, geographical Madden–Julian oscillation (MJO) propagation in association with precipitation rate was obtained using lag correlation applied to empirical orthogonal function (EOF) analysis modes 1 and 2 of filtered MJO data. The precipitation rate over Indonesia was provided at day -10 through day +10 in five-day steps during the December, January, and February (DJF) Western North Pacific (WNP) and July, August and September (JAS) Australian (AU) monsoon phases. Connection with local atmospheric factors was then sought through comparison of local precipitation, represented by 3-hourly precipitation, and dynamical processes, represented by multilevel wind, at seven locations across Indonesia. The results show a global MJO contribution toward local-scale phenomena in Tangerang, Surabaya, and Makassar during the DJF-WNP monsoon phase and in Padang, Medan, Surabaya, Makassar, and Kupang during the JAS-AU monsoon phase. Meanwhile, a lack of MJO contribution toward local factors is presumably due to other local through wider atmospheric-scale phenomena which are suspected to have more influence, particularly in Medan, Padang, Manado, and Kupang during the DJF-WNP monsoon phase, and in Manado and Tangerang during the JAS-AU monsoon phase. This research uses a dataset of 15-year series of daily and three-hourly Tropical Rainfall Measuring Mission (TRMM) (3B42 V7 derived) measurements, 850 hPa zonal wind measurements from 30-year reanalysis data from the ERA-Interim reanalysis dataset, and a 15-year series of 12-hourly observational soundings data from seven stations of the Indonesian Meteorological Climatological and Geophysical Agency (BMKG).
Groundwater Conservation Model in Coastal Plain of Semarang City Setyawan Purnama; Andri Kurniawan; Sudaryatno Sudaryatno
Forum Geografi Vol 20, No 2 (2006): December 2006
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v20i2.1814

Abstract

There are three objectives of this research. First, to build the model of groundwater usage and conservation in the research area. Second, to identify the behaviour of model in various usages and conservations. Third, to formulate the policy of groundwater resources management that suitable with the region caracteristic. As a result, show that the programme Powersim 2.5c can be used dan applied in hydrologis, especially in building groundwater conservation model. The conservation model that significantly suitable are to decrease the usage of water in domestic and industrial sector. Relationship by the third objectives, the some policies that can be carried out to conservations, namely decreasing water usage, restricting industrial growth, restricting settlement growth (especially in recharge area) and increasing the capacity of PDAM production.
Analisis Morfometri dan Morfostruktur Lereng Kejadian Longsor di Kecamatan Banjarmangu Kabupaten Banjarnegara Kuswaji Dwi Priyono; P Priyono
Forum Geografi Vol 22, No 1 (2008): July 2008
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v22i1.4926

Abstract

The aims of this research are: (a) to study and classify the landslide hazard level, and (b) to analysis morphometry and morphostructure slope at occurrence slides in the research area. The sampling method applied in this research was stratified sampling, landform units were applied as strata. The sample within strata was determined according the landslide hazard based factor that caused landslides. Analysed of morphometry and morphostructure conducted in described of landform units. The landslide location was mapped by determining landslide point with Global Position System (GPS), and morphometry slope analysis in three images with Digital Elevation Model (DEM) analysis. The results showed that the degree of landslide hazard in the research area could be classified into 9 units landform with 5 landslide hazard level, from very low until very high. At very high landslide hazard existed occurrence landslides at most, whereas at very low landslide hazard existed occurrence at least. From slope morphometry aspect, the point of the most landslide case is in mountain midle slope (11), lower slope (9), and upper slope (5). Flows type, soil fall, and rockfall all happen in lower slope. Landslide types almost (80%) happen in lower slope, whereas slump type happen in upper, middle, and lower slope. From slope form aspect, 70% landslide cases happen in concave slope position and slope classes 3-5 (9%). From morphostructure aspect, the research area hasn’t difference because of weathering level and litology structure condition which is relatively similar. Concave and aslant slope condition become the concentration point of surface flow water and under surface which are predicted be the most influence factor that cause landslide.
Study of Settlement Pattern in Klaten District, Central Java Province Agus Dwi Martono
Forum Geografi Vol 10, No 2 (1996)
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v10i2.502

Abstract

This study is aimed at studying spatial distribution patterns of settlement, inluding their variations and respective influencing facctors. The ultimated objetives to be ahieved are studying variation of dsitribution patterns of settlement, and the contribution of socio-economi facctors to the existing distribution patterns of settlement under varying topographic areas. The study is conducted in Klaten District, covering 401 villages in the district. A survey method is secondary data analysis. Data are analyzed statistically using T test, varians analysis, correlation, and multiple regresion. The research shows that there is no significant differences in distribution patterns of settlement between the Merapi volcanic slope, the lowland, and the hilly zone. Physical factors are not significantly influencing the distribution patterns of settlement in various topographic zone. A neglegible ifference in the index distribution pattern of settlement can be observed. Hilly zone of the district reveals an index of 0.959. lower than those in the volcanis slope (1.035) and in low land (1.058). distribution patterns of settlement in various topographi zone are ditermine by different sets of socio-economic variables. In the volcanic zone two variables i.e. population density and the portion of sawah area are strongly influencing the distribution patterns of settlement. In this zone population density contributes more than the sawh area. Where as in the low land areas housing density dictates the distribution patterns of settlement. Other variables such as population density, road density, and utilities are less significantly influencing settlement patterns in the low land areas. The same relation between settlement pattern and housing density is also obvious in the distribution patterns of settlement in this hill. In general distribution patterns of settlement in the district are ontrolled by housing density, population density and road density. The higher housing densities, the distribution of hamlets are more spread. The same relation applies to population density. The higher road density the more clustered is the distribution patterns of settleent can be observed in the fast growing areas, rather than the opposite. No differences in distribution patterns of settlement can be observed among development unit areas (SWP) in the district. 
Changes in Land Cover Analysis in The Gulf Coast Kendari Using High Resolution Satellite Image (Period: 2003-2009) Laode Muh. Golok Jaya
Forum Geografi Vol 27, No 2 (2013): December 2013
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v27i2.2375

Abstract

This research was aimed to indentify land cover change in coastal area of Kendari Bay in period 2003 to 2009. The satellite imagery data (Ikonos and Quick Bird) collected in 2003 and 2009 were used in this research to obtain the land cover change. The method used in this research was comparing the classification of satellite imagery. Field survey was conducted using handheld GPS for ground truth.  The result of this research showed us the land use change in period 2003-2009. Mangrove vegetation decreased 56.57 Ha and the fishpond also decreased 205.5 Ha. The primary forest decreased into 3.28 Ha in year 2009. The secondary forest also decreases 124.84 Ha. In the same time the urban area increased from 382.37 Ha in year 2003 to 674.37 Ha in 2009. The land use change also occured for the public space which increased from 6.49 Ha in 2003 to 18.46 Ha in 2009 or increased 11,97 Ha.
Livelihood Strategies as Responses to Water Availability in Pusur Subwatershed, Bengawan Solo Rathna Wijayanti; Muhammad Baiquni; Rika Harini
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.v30i2.2618

Abstract

Water availability has a significant role on human life, particularly for the rural, agrarian communities. This study aimed to investigate the diverse conditions of water availability in Pusur sub-watershed, Bengawan Solo watershed, and the livelihood strategies of the local community in responding to the water availability. The study used both quantitative and qualitative methods of data analysis, and the data was collected through questionnaire, in-depth interview, and observation. On the water availability, the study used the following variables: (1) quality, (2) quantity, (3) spatial and temporal distribution, (4) access, (5) social-economy, and (5) institutional aspect. On the livelihood strategies, it uses: (1) reaction and (2) anticipation for water deficit. In term of sampling methods, the study used area and purposive sampling, by splitting the study site into the upper, middle, and lower area. The analysis of this study indicates that the level of water availability in the upper area is considered low. The community living in the upper area depends upon rainwater for its agricultural sector, and upon the water supply distributed by pipelines and tanker trucks for its household. The study also indicates that the middle area has abundant water supply, but the quality has been declined due to pollution, poor sanitation system, and potential conflict among the community members. Meanwhile, in the lower area, particularly in the dry season, irrigation water has been inadequate. Responding to the diverse water availability, the community has applied the following livelihood strategies: (1) leaving the agricultural land uncultivated in the upper area, and (2) pumping wells and rivers in the middle and lower areas. In addition, as part of its precautions actions, the community has applied: (1) agroforestry system at the upper area, (2) improved the irrigation system of the middle area, and (3) creating wells and using water pumps in the lower area. 

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