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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
 98   99   100   101   102 
The Flooding Effect from Rice Cultivation Technique on Infiltration and Water Balance Lilik Slamet Supriatin; Adi Basukriadi; M. Hasroel Thayeb; Tri Edi Budi Soesilo
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.v27i1.5080

Abstract

Flood events are often inundated rice fields and can cause flooding to surrounding areas (the lower reaches of the river) should not be underestimated (just blame the rainfall factor alone), but should be seen also internal factors of the techniques of rice cultivation in paddy fields. The purpose of research/study was to analyze the effect of flooding on the cultivation of paddy rice to infiltration and provide alternative solutions cultivation techniques to reduce flooding. The research method in this study is a survey method with the quantitative approach. Techniques flooding in paddy rice cultivation, especially irrigated cropping pattern rice 3 times a year have resulted in the formation of plow layer tread that is waterproof (hardpan). Waterproof coating that forms on the floor of paddy (rice surface) cannot infiltrate rainwater so that if there is a high-intensity rainfall in the rainy season, rice cannot hold the rain water will overflow and cause flooding to the area around the rice fields. Techniques inundation in lowland rice cultivation resulted in flooded paddy rice growth period in a rather long time (over 2 months), so that the aggregate soil is loose and prone to erosion and landslide potential. Anticipation of floods caused by wetland can be done by making the high rice fields higher than the height of the floodwaters that ever happened to the rice field and lowering the height of standing water in the paddy fields.
Mapping Social and Economic Vulnerability in Forest and Peatland Fire Disaster in Bengkalis Regency, Riau Province Eko Ahmad Riyanto
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.v29i1.790

Abstract

The aims of this research are (1) analyzing social and economic vulnerability of forest and peat land fire disaster in Bengkalis Regency; (2) Mapping social and economic vulnerability of forest and peat land fire disaster in Bengkalis Regency.  Research Variable is social and economic vulnerability. The data that used is primary and secondary data with survey method. Analysis method is scoring and weightings. After that classified based on the value of the score to determine the level of vulnerability. The analysis based on the head of National Agency for Disaster Management (Perka BNPB) Number 02.2012 and literatures study. The results of research show that social vulnerability of forest and peat land fire in Bengkalis Regency is medium vulnerability because it has value of social vulnerability is 0.46663. While economic vulnerability in Bengkalis Regency is low vulnerability because economic vulnerability is 0.3333. In addition, required mitigation that is quick and appropriate by governments of Bengkalis Regency and the local community in management of forest and peat land fire disaster.
Urban Sprawl Typology in Semarang City Yutri Aprillia; Bitta Pigawati
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.v32i2.6369

Abstract

The population and economic growth increase the need of space leading to an increase in built-up area. There is an increased activity in the city centre which results in the residents feeling less comfortable to live in the area. Hence, the growth of the settlement area tends to head towards the periphery. This condition is an indication of the developments of the built-up area in the periphery. Urban sprawl is a phenomenon of development of an irregular built-up area which leads to the suburbs. Urban development as a result of urban sprawl will trigger an increase in the demand for supporting facilities and infrastructure. An urban Sprawl in Semarang City has resulted in the establishment of residential areas in a conserved region, which is against zoning regulations in the Semarang City Spatial Planning Document (RTRW). Urban Sprawl Typology Research in Semarang City aims to analyse the urban sprawl typology in the city. By knowing the typology, it can minimise the impact of urban sprawl. This research was conducted using the remote sensing method and geographic information system (GIS) with the Shannon's Entropy approach. The results indicated that in 2006 and 2016, urban sprawl in Semarang City had three types of typology that can be classified as typology I (low level), typology II (medium level) and typology III (high level). The impact of urban sprawl on typology II and III can be minimised through the provision of affordable housing with adequate infrastructure, and an improvement in the permit system for housing and settlement development.
The Hierarchy of Earthquake and Tsunami: The Cases of Aceh, Nias, Bantul, Pangandaran, and Sunda Staits Imam Hardjono
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.v20i2.1811

Abstract

Indonesia is vulnerable to earthquake and tsunami disaster because it is located in the fracture zone between the continental and oceanic lithospheres, running from the west of Sumatera, though the south of Java, NTB, Sulawesi to Papua. In the theoretical framework of Indonesian tectonic lithosphere, this zone is known as Sula-spuur. The frequent earthquake and tsunamis in Indonesia justify the theory that the earth will always seeks for dynamic self-balance through oceanic basin as well as continental basement expansions. Based on the tectonic lithosphere analysis, the anatomy of earthquake and tsunami disaster in Java falls into two different paths. The first is northwestward path in Western Java following the Semangko fault trend, from Pangandaran/Cilacap through Kadipaten, Subang to Jakarta. The other is the northeastward path in Central Java and East Java running from Bantul through Prambanan, Klaten to Rembang. The two hats correspond to the seventeen-kilometre-deep-underground fracture involving basement rocks resulted from the area shifting evolution during the limestone age prior to the existence of limestone in Indonesia. Based on the evidences found in Bantul- Klaten earthquake, the question necessary to raise is whether similar earthquake may happen in Jakarta.
Community Based Warning and Evacuation System against Debris Flow in the Upper Jeneberang River, Gowa, South Sulawesi Sutikno Hardjosuwarno
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.v22i1.4922

Abstract

Gigantic collapse of the Caldera wall of Mt. Bawakaraeng (2,830 m) in March 2004 had supplied the sediment volume of 230 million to the most upper stream of Jeneberang River, which flowed down to the lower reach in the form of debris flow which is triggered by rainfall. The purpose of the research is to provide a system which is able to forecast the occurrence of debris flow, to identify the weak points along the river course, to identify the hazard areas and how to inform effectively and efficiently the warning messages to the inhabitants in the dangerous area by using the existing modern equipment combined with the traditional one. The standard rainfall which is used to judge the occurrence of debris flow was established by Yano method. It is based on the historical data of rainfall that trigger and not trigger to the occurrence of debris flow which is widely used in Japan so far. The hazard area was estimated by Two-Dimensional Simulation Model for debris flow, the debris flow arrival time at each point in the river were estimated by dividing their distance from reference point by debris flow velocity, where the check dam no. 7-1 in Manimbahoi was designated as reference point. The existing evacuation routes were checked by field survey, the strength and coverage of sound for kentongan and manual siren were examined using sound pressure level at the location of the existing monitoring post and the effectiveness of warning and evacuation were evaluated by comparing the warning and evacuation time against the debris flow arrival time. It was resulted that debris flow occurrence was triggered by short duration of high rainfall intensity, long duration of low rainfall intensity and the outbreak of natural dam which is formed by land slide or bank collapses. The hazard area of upper Jeneberang River are mostly located on the river terraces where the local inhabitants earn their living through cultivating the river terraces as paddy fields, dry field and sand mining. It was also resulted that at the elevation of 700 m to the upper stream, the arrival time of debris flow is too short ( 3 minutes), it means that there is no time to evacuate when debris flow occurs. There are enough time to evacuate along the reaches between 700 m to 390 m and more time to evacuate along the downstream of 390 m river bed elevation due to the longer arrival time of debris flow. The existing community based warning system against debris flow uses radio transceiver to communicate between post and uses kentongan and sirens to propagate the warning message to inhabitants. Based on the sound test conducted in Jeneberang River, the manual siren has a coverage of 160 m to 600 m and it can be used in the warning system, being co-existence with the kentongan which has been used for a long time. In order to keep the community based warning system well functioned, it is recommended to synergize between the Local Government of Gowa Regency and the other stake holders with the inhabitants along Jeneberang River and the Sabo Community of Jeneberang in the operation and maintenance of the system.
The Utilization of Rawa Pening Swamp Area for Fisheries Su Ritohardoyo; Alip Sontosudarmo
Forum Geografi Vol 11, No 1 (1997)
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v11i1.499

Abstract

This article concern with the impact of the fishery ‘karamba’ system on socio-economics of fishermen in the Rawa Pening Environs. The aim of the study is to appraise the activities of fishery ‘karamba’ system. In the relationship with loccal fishermen income, and labor force employment. To some extent, the research is directed to study on income differentation based on job status as fishermen and ‘karamba’ farmers. Differentation of tools kinds for fishing, and seasonal variation. Survey method is employed in this research, whether it is for karamba farmer or local fishermen. Respondent number about 187 consists of 139 fishermen, 28 ‘karamba’ labors, and 20 ‘karamba’ farmers. Technical of tabulation and ‘t’ test statistical use for data analysis.The research shows that fishery ‘karamba’ system so much decreases on the activities, number of facilities, and it fish production. Decreasing of those are mainly caused by uncontrolled growth of ‘eceng gondok’ (Eichornia crassipes), capital constrain, and security constraint especially stealing of fish production. The existing of fishery ‘karamba’ system employs 68,00% labors are local fishermen, and 32,00% are not fishermen come from other areas. Viewed by the job opportunities most of part contribute ‘karamba’ farmers (55%) who ome from out of the area, and 45% ‘karamba’ farmer are local people. Really affect of the fishery ‘karamba’ system to the local fishermen is decreasing of fish production. Fish production of local fishermen has been lower since fishery ‘karamba’ system be carried out in this lake. Though the fish production of fishery ‘karamba’ system decreases, however income average of the ‘karamba’ farmer is higher (Rp 1,849,000/annum) than the income average of local fishermen. The average of fishermen income who using fish grasper is higher (Rp 1,401,000/annum) than the average of fishermen income who using fish trap (Rp 1,21,000/unnum) and who using fish grasper and fish trap (Rp 1,349,000/annum). Nevertheless the average of fishermen’s income is higher than ‘karamba’s’ labor (Rp 897,000). This research is also finding wether it is average production or income of the ‘karamba’ farmer are not seasonal, and those are quite difference with local fishermen. The average of fish production on dry season (825 kg) are higher than on wet season (625 kg). Therefore, the average of income on dry season are higher than that on wet season.
Model of Conservation on Sagara Anakan Environment Dede Sugandi
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.v27i2.2372

Abstract

Widespread decline in agricultural land and the impact on production decline caused extensive forest activities to meet the needs of the population. Activities that cause less environmental quality offset environmental balance changes. These changes due to deforestation, erosion, degraded land and natural resource degradation are exploited so that the function of ecological, economic and social life. Damaged ecosystems resulting in erosion, landslides in the watershed affect the sedimentation in Sagara Anakan sea. Silting, resulting in narrowing of fishing activities, tourism, sports, and services decreased crossings. Because of the problem and the purpose of this study proposed and analyzed a few questions: 1) How does the socio-economic impact of farmers in conserving the environment of Sagara Anakan ?, 2) How do people form of conservation and coastal of Sagara Anakan ?, 3) How model of integrated conservation in the watershed and coastal of Sagara Anakan ? and 4) What role do the people in the watershed and coastal on Sagara Anakan conservation ?. Study site covers an area of flow and Ci Ci Tanduy Beureum and Sagara Tillers waters. Activities of the population in the process of land affected when in Sagara tillers. The method used was a survey with a sample divided by the watershed upstream, downstream and coastal tengahm. Using statistical analysis techniques and geography, so that part of the watershed characteristics can be imaged. Shallowing Sagara Anakan, physically was affected by the physical condition of the easily eroded and accelerated by human activities. The activities of farmer on the watershed have done conservation unless doing reforestation, whereas the farmer on the swamp and coastal areas are not doing conservation. Different physical circumstances, the conservation of watersheds and coastal forms differ. Socio-economic condition of farmer affect the conservation. The farmer could not reforestation conservation form, as the socio-economic needs. While in the farmer swamp and coastal conservation is not done, because the physical state was not possible. To conserve of Sagara Anakan, then the shape of coastal conservation by planting trees, not catch fish, marine dredging, not taking out the trash, do not use drugs to win the fish and catch a certain size. While in conservation should be done with different shape and performed in an integrated manner that requires the participation of the population.
Impacts of Climate Change (El Nino, La Nina, and Sea Level) on the Coastal Area of Cilacap Regency Lilik S. Supriatin; Martono Martono
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.v30i2.2449

Abstract

This research was conducted to determine the impact of El Nino and La Nina on rainfall as well as the impact of El Nino, La Nina, and sea level on coastal flooding in Cilacap Regency. The methods used in this study were statistical analysis and simulation. The results of this study were El Nino caused diminished rainfall in Cilacap regency between 295 to 1665 mm. Meanwhile, La Nina caused surplus rainfall between 189 - 691 mm/year in compared with annual climatological rainfall. When ENSO phenomenon (El Nino) occurred, it caused sea level anomaly to fall, including in 1994, 1997, and 2002 of -11.63 cm, -11.5 cm, and -4.95 cm, respectively. Meanwhile, in La Nina years in 1999 and 2000, the  sea level anomaly enhanced by  2.55 cm and 5.03 cm, respectively. The result of sea level projection by employing simulation model in this study was compared with the simulation results of the IPCC that obtained a correlation coefficient r of 0.99. Based on the simulation results, the 8 (eight) sub-districts in Cilacap Regency located in the coastal area potentially endure flood due to the impacts of global warming and La Nina with a diverse predicted year of occurrence depending on the altitude of each sub-district.
Monitoring Penutupan Lahan di DAS Grindulu dengan Metode Penginderaan Jauh dan Sistem Informasi Geografis Beny Harjadi
Forum Geografi Vol 24, No 1 (2010): July 2010
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v24i1.5017

Abstract

Catchments area can be analyzed as management system. Catchments area acquire input and it processed by the system to produce output. Land covers in catchments area are closely related to land use pattern and to management system. Land use changes to building area, agriculture and another activity are related to anthropological characters effected by change in function from vegetated land to unvegetated land. This condition have negative influences to the condition of carchment area. The damaged level of catchment area can be reflected by flood susceptibility, droughness, erosion and sedimentation, related impact onsite and offsite, so it is need a comprehensive management system from up land to low land river. To give information of land use in catchments area it needs accurate data about land cover in wide range. Remote sensing and Geographic Information System (GIS) are applicable to monitor land coverage of management catchments area. The aim of this paper is to analyze land cover using remote sensing and GIS to catchments area monitoring and evaluation. Land use in watershed connection with the pattern of nature resources by the community and the management of watershed. Total area of land use Grindulu watershed was 65.539 ha. From the map of land use could be seen that the spreading of the equitable meeting forest from the upstream to lower, and most property of the people. Land use became 8 classes, that is: Agroforestry (20%), Open Land (12%), Rare Forest (1%), Dense Forest (29%), Village (34%), Paddy (0.4%), River (0.2%), and Field (3%).
Bibliografi Beranotasi Fertilitas dan Keluarga Berencana P Priyono
Forum Geografi Vol 5, No 1 (1991): July 1991
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v5i1.531

Abstract

Bibliografi beranotasi merupakan reference yang memberi informasi mengenai sumber tertentu dan ditambah topik inti. Belum ada aturan yang baku tentang fertilitas dan keluarga berencana pada tulisan ini dibuat seringkas mungkin dengan tidak meninggalkan topik inti yang terkandung dalam sumber aslinya. Buku atau reference yang digunakan untuk menyusun bibliografi ini merupakan koleksi Perpustakaan Pusat Penelitian Kependudukan Universitas Gadjah Mada Yogyakarta. Anotasi yang terkandung berkisar pada upaya untuk menurunkan tingkat dan memacu keberhasilan keluarga berencana di Indonesia. Faktor-faktor yang dibicarakan dalam upaya tersebut antara lain faktor sosial, ekonomi, budaya, demografi, peran tokoh formal maupun informal, dan unsur geografi.

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