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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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Contamination Vulnerability Analysis of Watershed for Water Quality Monitoring Widyastuti Widyastuti; Slamet Suprayogi
Forum Geografi Vol 20, No 1 (2006): July 2006
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v20i1.1803

Abstract

This research is an early step to determine the location of rain gauge station for artificial neural network modeling. The implementation of this model is very useful for water quality monitoring. The objectives of this study are: 1) to study the distribution of watershed parameter, that are average annual precipitation, land use and land-surface slope, 2) to conduct vulnerability analysis of watershed contamination, 3) to determine the location of rain gauge station. The study was performed by weighing and rating method of watershed parameters. The vulnerability degree of watershedtocontaminationispresentedasvulnerabilityindex.Thisindexisdeterminedbyoverallsumofallmultiplication between score and weigh number of each parameter. All data manipulation and data analysis were performed by using Geographic Information System (ArcView version by 3.2). The vulnerability of watershed contamination map had been generated using overlay operation of parameters. The results show that vulnerability index are varies between 10 up to 40 intervals. Hence, the indexes were categorized into three levels of watershed vulnerability, namely low (10 – 20), moderate (20 – 30) and high (30 – 40). It is found that the study area covered more by high vulnerability of watershed to contamination. The zoning of watershed vulnerability meant to determine the rain gauge location. There are three rain gauge stations on the area that they are in a high vulnerability level, whereas the other vulnerability level area has one rain gauge station. Each level of vulnerability area is able to represent the source of contaminant that it maybe influence the water quality of Gajahwong river.
Perbandingan Pendapatan, Curahan Jam Kerja, dan Tenaga Kerja Usaha Tani Tebu Rakyat Intensifikasi (TRI) dengan Usaha Tani Padi di Desa Karangmojo Kecamatan Tasikmadu Kabupaten Karanganyar Tahun 1992/1993 D Dahroni
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.v8i2.4825

Abstract

Program Tebu Rakyat Intensifikasi (TRI) adalah program nasional yang mulai dilaksanakan sejak dikeluarkannya Inpres Nomor 9 Tahun 1975. Mengingat arti pentingnya program TRI sebagai program nasional dan kelompok sasaran yang dituju yakni para petani, maka penelitian ini bertujuan untuk mengukur besarnya perbandingan pendapatan petani dari usaha tani TRI dengan pendapatan petani dari usaha tani padi. Penelitian ini juga bertujuan untuk mengukur besarnya curahan jam kerja yang dimanfaatkan dari masing-masing cabang usaha tani di Desa Karangmojo, Kecamatan Tasikmadu, Kabupaten Karanganyar. Dalam penelitian ini metode yang digunakan yakni metode survai dan penentuan sampel dilaksanakan secara sampling. Sampel wilayah dan sekaligus sebagai daerah penelitian, ialah ditentukan secara purposife. Responden dalam penelitian ini ialah petani yang berusaha pada TRI, petani padi, dan buruh tani. Pengambilan responden dilakukan dengan cara mengambil 55 responden, terdiri dari Kelompok I sebanyak 11 sampel petani TRI dan padi, Kelompok II sebanyak 27 sampel petani TRI dan padi, dan Kelompok III sebanyak 23 sampel petani TRI dan padi. Data yang diambil dalam penelitian ini yakni data primer dan sekunder ditambah data yang diperoleh melalui wawancara bebas kepada pamong penduduk yang ada hubungannya dengan penelitian ini. Jenis data primer yang dikumpulkan berupa pendapatan petani dari usaha tani TRI dan usaha tani padi. Data sekunder yang dikumpulkan antara lain data penduduk, luas penggunaan lahan, pengairan, curah hujan dan pengolahan TRI beserta besarnya rendemen tebu. Hasil penelitian ini menunjukkan bahwa pendapatan dari usaha tani TRI lebih kecil daripada pendapatan usaha tani padi (pendapatan usaha tani padi banyak Rp. 2.297.363,90 sedangkan usaha TRI Rp. 7.927.866,12). Curahan jam kerja (jam kerja dan tenaga kerja) yang dimanfaatkan dari usaha tani TRI lebih kecil daripada usaha tani padi (jumlah jam kerja usaha tani padi sebanyak 2.237,29 jam dan usaha TRI sebanyak 7.937,95 jam, jumlah tenaga kerja usaha tani padi 758 orang dan usaha TRI 7 05 orang). Disamping, itu ada keluhan perihal persoalan-persoalan yang dihadapi oleh para petani sistem target glebagan, yang tanpa disadari pertimbangan-pertimbangan, perhitungan kadar rendemen tebu tidak jelas dan potongan-potongan yang tidak jelas pula.
A concept of Surveying and Mapping Vulnerability and Flood Hazard (with Hydro-Geomorphological Approach) Suprapto Dibyosaputro
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.v12i1.482

Abstract

The general event of natural process phenomena on lowland areas is flood as an effect of the overtooping stream water over natural levees and inundate the area of surrounding the river. Most of the lowland surround the rivers is used by man for settlements, agriculture land, high way, and other activities to support their life intensively. Therefore flood is not only the physical phenomena but also a socio – economic phenomena. One of the way to understand the spatial distribution of flood prone areas an be done by means of survey and mapping of the flood susceptibility and hazard using an hydro- geomorphological approach. The fluvial landform units on the lowlands reflect the effet of the geomorphological and hydrological processes in the past. Therefore those phenomena can be applied to explain the recent flood characteristics such as inundation  area, depth and flood duration, as well as flood frequencies and sources of floods. This explanation can be used as the starting point of the existing information which an be used as a basic survey and mapping of the flood suspectibility and hazard. The exiting of the interaction between man and natural event (flood) information, can also be applied as a fundament to define the hazard levels of every landform units own flood susceptibility levels.
Preliminary Assessment of Morphometric and Hydrological Properties of Six Watersheds in the Eastern Part of East Java Indarto Indarto; Entin Hidayah
Forum Geografi Vol 33, No 1 (2019): July 2019
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v33i1.7858

Abstract

A hydrological process on the watersheds is driven by rainfall as the input. Physical properties  also affect the magnitude response of the watershed to produce run-off. This paper presents the identification, assessment and visualisation of morphometric and hydrological properties of the watersheds.  Six watersheds in the eastern part of East Java were used for the analysis.  Physical characteristics obtained by cropping the GIS layer with a watershed. Topographic and morphometric properties of the watersheds derived from the ASTER G-DEM2. Furthermore, hydrological properties are derived statistically by analysing available rainfall and discharge data. Hydrological data (rainfall and discharge) are available from 1996 – 2014.  Finally, simple statistical analysis by plotting obtained values are used to interpret the relation between morphometric and hydrological properties of the watersheds. The results show the quantitative number (unit) to describe the morphometric and hydrological properties of the six watersheds that can be used for watershed classification.
Geological Identification of Seismic Source at Opak Fault Based on Stratigraphic Sections of the Southern Mountains Hita Pandita; Sukartono Sukartono; Agustinus Isjudarto
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.v30i1.1508

Abstract

Earthquake is one of the unpredicted natural disasters on our earth. Despite of the absence of high-accuracy method to precisely predict the occurrence of earthquake, numerous studies have been carried out by seismologists to find it. One of the efforts to address the vulnerability of a region to earthquakes is by recognizing the type of rock as the source of the earthquake. Opak Fault is an active fault which was thought to be the source of earthquakes in Yogyakarta and adjacent areas. This study aimed to determine the seismic source types of rocks in Yogyakarta and adjacent areas. The methods were by measuring stratigraphic sections and the layer thickness in the western part of Southern Mountains. Field study was done in 6 (six) research sites. Results of stratigraphic measurement indicated the sedimentary rocks in the Southern Mountains was 3.823 km in thick, while the bedrock was more than 1.042 km in thick. Based on the result, the rock types as the seismic source were thought to originate from the continental crust rocks formed of granite and metamorphic complex.
Tipikal Kuantitas Infiltrasi Menurut Karakteristik Lahan (Kajian Empirik di DAS Cimanuk Bagian Hulu) Dede Rohmat
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.v23i1.4998

Abstract

Rate of infiltrate can be conduct as function of permeability, suction head and moisture of soil parameter. The parameters have close relationship with soil physical characteristics. That relation can be formulated by empirical research. This study have aim to get typical infiltrate quantity based on land characteristics. Method of Green-Ampt infiltrate developed and used to study typically of infiltrate capacity on Upstream of Watershed (Case on Upstream Cimanuk Watershed). Research conducted use empirical and analytical approach.Study conducted at Oxisol Soil occupied by five kinds of land use. There are 96 soil samples was gathered, taken away from 16 observation points. About 12 parameters of soil physical properties were analyzed to each soil sample. The study covering, development of typical capacities infiltrate pursuant on empiric data at multifarious land characteristics (forest; agro forestry; second crops (palawija); settlement; and non-arable land). The precipitation intensity has been formulated as function of rainy duration and its probabilities. K formulated as function of volumetric water content; rapid drainage pores, and slow drainage pores (K = f (θ, ηc, ηl). Parameter of y, formulated as function of soil moisture (ψ = f (θ)). Parameter of F (T) dummy, formulated as function of p and t; (F (T) Dummy=F (t,p)). So that pursuant to empirical data, rate of infiltrate f (t)) of Green Ampt developed as f (t = f (θ, ηc, ηl, τ, π); and infiltrate cumulative can be calculated by F (F = f (t), t). Infiltrate of every kinds of land characteristics have pattern which much the same to, but differ in its quantity.
Mengkaji Rational Comprehensive Planning Theory dalam Konteks Indonesia Muhammad Musiyam
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.v10i1.514

Abstract

Akhir-akhir ini, setidaknya sejak lima tahun terakhir banyak kalangan yang menyangsikan relevansi dan keandalan teori dan praktik perencanaan kota konvensional (Rational Comprehensif Planning/ Prosedural Planning) yang selama ini dianut. Diperkirakan tidak lebih dari 30 persen dari materi yang tertuang dalam rencanaa-rencana kota di Indonesia yang dapat diimplementasikan. Tulisan ini dimaksudkan untuk mengkaji teori dan praktik Rational Comprehensif Planning dalam konteks Indonesia. Rational Comprehensif Planning (RCP) merupakan model perencanaan yang sangat dipengaruhi oleh Classical Scientific Method yang dilandasi oleh pendangan postivisme dan Cartesian – Newtonian. RCP ditegakkan atas asas rasionalitas. Dalam lingkup perencanaan identik dengan menggunakan pendekatan keilmuan (scientific approach) di dalam proses penganalisaan dan cara pemecahan masalah. Dengan demikian, rasionalitas menuntut dasar pertimbangan yang sistematik dan evaluasi yang tepat terhadap berbagai alternatif cara untuk mencapai tujuan. Untuk dapat menerapkan rasionalitas dalam proses perencanaan maka di samping diperlukan perencanaan yang ‘serba tahu’ dan mampu mensintesiskan semua persoalan yang muncul, juga dibutuhkan informasi yang lengkap dan menyeluruh dalam cakupan perencanaan. Di Barat RCP sudah mengalami fase krisis, di Indonesia model perencanaan ini sedang mengalami masa puncak dengan RUTRK-nya. Di sini terlihat bahwa kita tertinggal cukup jauh dalam hal perkembangan pemikiran tentang perencanaan. Sejak lima tahun terakhir muncul berkembang beberapa paradigma lain yang lebih berorientasi pada kkomitmen kerakyatan, sebagai akibat ketidakpuasannya terhadap RCP yang dianggap kurang berhasil menyelesaikan konflik tata ruang di kota yang cenderung intensitasnya semakin meningkat.
Dynamic Land Resources Management at the Mount Kelud, Indonesia Puspita Indra Wardhani; Junun Sartohadi; Sunarto Sunarto
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.v31i1.3612

Abstract

There is a contradictive situation between the theory that believes that high volcanic hazard areas should be for limited production zones and those areas that are intensively utilised for several production activities. This paper tries to discuss that contradictive situation from both the perspective of natural hazards and natural resources, therefore, the best options for the land utilisation pattern might be formulated at these high volcanic hazards areas. We conducted landscape analysis that covers volcanic morphology, volcanic materials, and both natural and artificial processes that modify the morphology and materials characteristics. The natural processes occurring in the high volcanic hazard might cover non-volcanic processes such as erosion and landslide. The artificial processes were usually considered as land utilisation activities by the local community. In such areas where both natural and artificial processes occurred, we conducted in-depth interviews to assess the community perception on thread and benefits of the last Kelud Eruption in February 2014. We evaluated the current land resources utilisation and portrayed the local adaptive land resource utilisation. There were three types of land resources available at the active volcano: space, natural scenery, and volcanic materials. The availability of these land resources was in a dynamic condition both in terms of quality and quantity. Immediately after the eruption, the natural scenery made the area attractive as a tourist destination. Following the high intensity of rainfall, the volcanic materials might be used as high-quality construction materials. The available space might be utilised for any purposes after the situation became relatively stable. The current space was mostly used for agricultural enterprises which accommodates the physical and socio-cultural characteristics of the active volcano environment.
Understanding the Implementation of Small-Scale Water and Other Infrastructure Developments in Small Islands in Indonesia: A Rapid Survey in Bintan and Mandeh Islands Pitri Yandri; FX Hermawan Kusumartono; Nanang Rianto; Intan Adhi Perdana Putri
Forum Geografi Vol 34, No 2 (2020): December 2020
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v34i2.9224

Abstract

Access to clean water and electricity is one of the sustainable development agendas being addressed worldwide. However, people living on small islands scattered throughout Indonesia still face difficulties in accessing clean water and electricity. In an effort to overcome this problem, the Indonesian government and other donors are building small-scale clean-water infrastructure in a number of these small islands. Other infrastructure, such as electricity supply, has also been developed in a number of places. The infrastructure framework for these works is directed toward community-based management efforts. However, various problems have emerged after the construction of these facilities. Instead of achieving increased community participation in their management, the opposite occurs. This article investigates this situation using a rapid survey of communities in Bintan Island and Kapo-Kapo Island in the Mandeh Waters area, and finds that the development of small-scale infrastructure has a different impact on the two regions observed. An elaboration of various field findings is presented in detail in this article.
Environmentally Friendly Concept in Spatial Regulation T Taryono
Forum Geografi Vol 6, No 2 (1992): December 1992
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v6i2.398

Abstract

Spatial order of a region include purpose of structure and interrelatedness of spatial order which as a unity of development mechanism. Spatial order can’t be part from law basic that is UUD’45 and GBHN, in order to the management can be integrated and keep the environment. Spatial order also take note of physical factor and non physical factor. Physical factor consist of soil, water, flora, and fauna. Non physical factors consist of environment, social, economic, and soon. The principle of arrangement of spatial order in a region include national region, regional and local, and a region as an administrative baoundary, that is local government authority, like province, district, subdistrict, and village. The effort for spatial ordering of the environment, for example ordering resource, arrangement of allocation and location, arrangement of environmental aesthetic  and arrangement of environmental quality.

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