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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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Introduction of Alley Cropping Sugeng Parmadi
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.v12i2.477

Abstract

One of the efforts to preserve the sources of vegetarian, soil, and water is to rehabilitate the land and soil conservation. The aim of this rehabilitation is increasing and maintaining the produtivity of the land, so it can be preserved and used optimally. Therefore, it is necessary to a  develop a variety of good soil conservation, such as vegetative method and civil engineering. To find an appropriate technology, so it is necessary to develop some alternatives of soil conservation technique that are mainly implemented at dry land with its slope of more than 15% in the upstream area of discharge. One of the most suitable soil conservation technique today is Alley Cropping. Based on the research (trial and error) in some areas, Alley Cropping could really provide a positive result in terms of erotion controlling and running off and maintain the land productivity. In addition, the technique is more easly operated and spends a cheaper cost than making a bench terrace.
Analysis of Animal Accidents along the Road of Padamara-Karangcegak in Geospatial Perspective Sakinah Fathrunnadi Shalihati; Esti Sarjanti
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.v33i1.6803

Abstract

The occurrence of animal accidents is one of the consequences of physical environmental interaction of animal in terms of their movement from one place to another and non physical environment in the form of transportation usage by human. Accidents happened to animals can affect the structure of the food chain. It would be a matter if it occurred continuously because some species of animals that were important to the ecosystem would not exist anymore. The records of the frequency of animal accident and habitat along Jalan Padamara-Karangcegak by geospatial could be used to analyze the correlation between the dominance of animal species getting the accidents and the potential width of the habitat owned along the road. Qualitative description was used as the method of the research. It was from the primary data analysis of the distribution of accident and secondary data of the land use from Google Earth of  satellite image which was then processed by Geographic Information System. The results obtained during observations from April to July 2016 showed that there was a correlation between the animal habitat and the accidents happened. The animal with a wider habitat dominated the accidents occurred than animals with no extensive habitat.
The Influence of Cultivation System on Distribution Profile Of 137cs and Erosion / Deposition Rate Nita Suhartini
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.
Kajian Model Estimasi Volume Limpasan Permukaan, Debit Puncak Aliran, dan Erosi Tanah dengan Model Soil Conservation Service (SCS), Rasional Dan Modified Universal Soil Loss Equation (MUSLE) (Studi Kasus di DAS Keduang, Wonogiri) Ugro Hari Murtiono
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.v22i2.4992

Abstract

Hydrologic modelling has been developing and it is usefull for basic data in managing water resources. The aim of the reseach is to estimate volume runoff, maximum discharge, and soil erosion with SCS, Rational, and MUSLE models on Keduang Watershed. Explain the data analysis, and flow to get the data. SCS parameters model use are: runoff, rainfall, deferent between rainfall runoff. The deferent rainfall between runoff relationship kurva Runoff Coefisient (Curve Nunmber/CN). This Coefisient connected with Soil Hydrology Group (antecedent moisture content/AMC), landuse, and cultivation method. Rational parameters model use are: runoff coefisient, soil type, slope, land cover, rainfall intensity, and watershed areas. MUSLE parameters model use are: rainfall erosifity (RM), soil erodibility (K), slope length (L), slope (S), land cover (C), and soil conservation practice (P). The result shows that the conservation service models be applied Keduang Watershed, Wonogiri is over estimed abaut 29.54 %, Rational model is over estimed abaut 49.96 %, and MUSLE model is over estimed abaut 48.47 %.
Development and Environmental Resources Conservation Retno Woro Kaeksi
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.v10i2.509

Abstract

Development is a certain coveted by all people in which included the natural resource development of living members, because a large part of human necessity is supplied by the natural resource. Thus, the more population the more necessities of the natural resource consumed. Natural resource availability is limited while the development is in progress. In such condition the resource is getting decrease and finally destroyed, unless we develop its and make a provision in replacement. Acording to what  is said by, it is needed a human knowledge about environmental concept of living members in order that in the desired development realization an environmental conservation will be protected permanently.
Temporal Decorrelation Effect in Carbon Stocks Estimation Using Polarimetric Interferometry Synthetic Aperture Radar (PolInSAR) (Case Study: Southeast Sulawesi Tropical Forest) Laode M Golok Jaya; Ketut Wikantika; Katmoko Ari Sambodo; Armi Susandi
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.v31i1.2518

Abstract

This paper was aimed to analyse the effect of temporal decorrelation in carbon stocks estimation. Estimation of carbon stocks plays important roles particularly to understand the global carbon cycle in the atmosphere regarding with climate change mitigation effort. PolInSAR technique combines the advantages of Polarimetric Synthetic Aperture Radar (PolSAR) and Interferometry Synthetic Aperture Radar (InSAR) technique, which is evidenced to have significant contribution in radar mapping technology in the last few years. In carbon stocks estimation, PolInSAR provides information about vertical vegetation structure to estimate carbon stocks in the forest layers. Two coherence Synthetic Aperture Radar (SAR) images of ALOS PALSAR full-polarimetric with 46 days temporal baseline were used in this research. The study was carried out in Southeast Sulawesi tropical forest. The research method was by comparing three interferometric phase coherence images affected by temporal decorrelation and their impacts on Random Volume over Ground (RvoG) model. This research showed that 46 days temporal baseline has a significant impact to estimate tree heights of the forest cover where the accuracy decrease from R2=0.7525 (standard deviation of tree heights is 2.75 meters) to R2=0.4435 (standard deviation 4.68 meters) and R2=0.3772 (standard deviation 3.15 meters) respectively. However, coherence optimisation can provide the best coherence image to produce a good accuracy of carbon stocks.  
Family Planning Behavior and Small Family Concept Acceptance in Two Different Geographical Characteristics Municipality of South Klaten, Klaten, Central Java P Priyono
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.v6i2.393

Abstract

The research aim to know the family planning behaviour, the acceptance small family norm and the influential factors in two villages that have different geographical aspect. The behaviour involve the knowledge, the attitude and the practice where as the influential factors involve education, accupation, values of children, income, children still born and family size desired. The research areas are chosen purposive in two villages that have different geographical aspect, social aspect and cultural aspect. The aspect are: 1) location and topography, 2) socialy  structure, and 3) the achievement of effective acceptor. Based on the three aspects, Ngalas village (developing) and Sumberejo (developed) are chosen as research areas. The recorded as ative acceptor (recordedin RI/PUS/1991 form). The respondents are chosen by cencus at two neighborhoord association at every village. There are six variables in this research are assumed influence the periode of the contraceptives use, such as education, occupation status, values of children, family income, children still born, and family size desired. There are three variables are assumed influence the small family norm, such as education, occupation status, and values of children. The data was analyzed by frequency table, crosee table, and statistical analysis (Q square and Regresion). The data was always compared between the two villages. The analysis use computer by Microsoft Program. The research result showed that Sumberejo was better than Ngalas in the knowledge, the attitude, and the practice of family planning. Most of the people who live in Sumberejo understood the contraception device well (52,4%), where as in Ngalas (26,8%). Both of them agreed on using contraception device (more than 70%). The respondent who live in Sumberejo used IUD (40%) and MOW/MOP (23,23%). They had used of the contraception device for 4.8 years on an average. Mean  while the respondents in Ngalas use IUD (23,68%) and MOW/MOP (2,63%). They had used the contraception device for 3,8 years on an average. With respect to decision making of family planning. Sumberejo was better than Ngalas (Sumberejo: 83,4% and Ngalas 63,64%). The purpose of family planning has achieved birth stop. Sumberejo achieved 73,33% and Ngalas achieved 54,55%. The research result showed that the both Sumberejo and Ngalas accepted small family norm. Values of children  were heigh (Sumberejo 97,57% and Ngalas 93,31%). It indicates that the parent still hope the children role for their family. Not only did the parent hope from economics aspect but they hoped from non economic aspect as well. Both the average of live birth and the children who still alive in Sumberejo was lower than Ngalas. Mean while the number of the children who were desired was 2,9 child in Sumberejo and 2,8 in Ngalas. Based on seven statement that was used to identify the small family, there was tendency that the respondent in Sumberejo had better attitude than Ngalas about small family. The factor that influence the period of the contraception device was the number of the children who still children, income, and family planning norm did not influence the period of using of contraception device. The influential factors in acceptance of small family was education. The higher education the better aception of small family norm. Values of children also influenced the acceptance of small family norm, but there was difference of the direction between Sumberejo and Ngalas. In Sumberejo the higher occupation the better aceptance of small family norm, but in Ngalas, the higher percentance occupation the lower acceptance of small family norm.
Pemanfaatan Teknologi Penginderaan Jauh dan Sistem Informasi Geografis untuk Pendugaan Potensi Peresapan Air DAS Wedi Kabupaten Klaten-Boyolali Agus Anggoro Sigit
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.v25i1.5028

Abstract

The study was conducted in Klaten-Boyolali regencies in Wedi Watershed which is the Watershed of Dengkeng. The study aimed to: 1) know the interpretation precision of black and white panchromatic air photo scaling 1: 50.000 in identifying the soil factor, slope, landuse, vegetation density, and land conversation, related to the influences toward potensial water infiltration in the area of study; and 2) to know the distribution of potensial water infiltration in the area of study and analyze to the spatial distribution. The method of the study used was air photo interpretation supported by limited survey for filed test. The method of analysis applied was spatial analysis using Geographical Information System Technology (GIS). The result of the study showed that: 1) the level of air photo for interpreting determination factor of water infiltration in the area of study is acceptable together with the precision level of: slope 89.47%; soil texture 82.14%; land use 90.16%; vegetation density 88.89%; and land conservation 80.88%. it meant that although the precision level achieved had not been included in very precise category, the air photo still can be used in this study; 2) the potensial of water infiltration in the area of study tended to be less good, indicated by the dominance of the land in status of ‘begin to be rather critical and critical’ in the width of 81.999 km² or 75.04% placed by 28 land units; while the remaining of 8 land units in the width of 3.154 km² or 20.62% was in the status of 'natural normal' and 14 land units in the width of 22.544 km² or 20.62% had ‘good’ status. In the area of study, the space of land units with the potensial of good infiltration had no spatial relevance to the space of land units and the great infiltration capability.
Utilization of Aerial Photograph and Geographic Information System for Deposit Measurement of Wuryantoro Watershed, Wonogiri Sugiharto Budi Santoso
Forum Geografi Vol 17, No 1 (2003)
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v17i1.591

Abstract

This research is carried out in Wuryantoro Watershed, Wonogiri, Central Java. The goal of this study is to examine the remote sensing tehnology capability to obtain the parameters of the physical data of land in the prediction of sediment yield. The approach used in landscape with the land unit as mapping unit by using MUSLE (Modified Universal Soil Loss Equation) model. The data analysis used the infrared aerial photo interpretation, which is combined   by Geographical Information Systems (GIS). Infrared aerial photo on scale 1 : 10.000 in 1991 is used as primary source of data to obtain the parameters of physical data of land. The data analysis uses the Geographical Information Systems. The prediction of the sediment yield is not done directly. First, predicated the runoff characteristi, which contains of runoff coeficient, runoff volume and peak discharge. Then the runoff charateristic with other influential factors (slope, soil, and land cover and conservation practice) are used to predict the sediment yield. The result of the prediction is tested by comparing them with the data of field measurenment result. The accuracy of the result of aerial photo interpretation for prediction sediment yield is 89.45%.
Peranan Sistem Informasi Geografi dalam Pengelolaan Sumber Daya Hutan di Indonesia Suharto Widjojo; S Sambiyo
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.v5i2.4676

Abstract

Eksploitasi sumberdaya hutan yang berlangsung secara cepat perlu diimbangi dengan pengelolaan yang cukup baik agar sumberdaya yang tersedia tidak punah. Pengelolaan sumberdaya yang dilakukan secara konvensional akan menyita waktu, biaya dan tenaga disamping sulit diperoleh keseragaman data. Dengan dikembangkannya teknologi sistem informasi geografi (GIS/SIG) diharapkan dapat membantu pengelolaan sumberdaya hutan yang ada yang akhirnya akan mempermudah pemanfaatan sumberdaya yang tersedia secara optimal.

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