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Rural Settlement Development and Environment Carrying Capacity Changes in Progo River Basin
Get PDFGenerally the broader rural settlement the heavier population pressure on agricultural land. It indicates that carrying capacity of the rural environment threatened lower. The spatial distribution of the threat in a river basin is quite important as one of the river basin management inputs. Therefore, this article aims at exposing result of research about influence rural population growth and rural settlement land changes to environment carrying capacity. This research was carried out in the rural area in Progo river basin consists 56 sub districts (34 sub districts part of Jawa Tengah Province, and 22 sub districts part of Yogyakarta Special Region). The whole sub districts are such as unit analysis, and research method is based on secondary data analysis. Several data consist Districts Region in Figure 1997 and 2003 (Temanggung, Magelang, Kulon Progo, Sleman and Bantul) such as secondary data analysis. Data analysis employs of frequency and cross tabulation, statistics of regression and test. Result of the research shows that population growth of the rural areas in Progo river basin are about 0.72% annum; or the household growth about 3.15% annum as long as five years (1996-2003). Spatial distribution of the population growth in the upper part of the Progo river basin is higher than in the middle and lower part of the basin. The number proportion of farmer in every sub district area in this river basin have increased from 69.95% in 1997 to 70.81% in the year of 2003. It means that work opportunities broadening are still sluggish. However, the number proportion of farmers in the upper part of the Progo river basin is lower than in the middle and lower part of the basin. The rates of settlement land areas changes (0.32 ha/annum) as long as five years (1997-2003) is not as fast as the rates of agricultural land areas changes (0.47 ha/annum). Spatial land settlement areas changes in the lower (6.1 ha/annum) and middle parts (2.4 ha/annum) faster than upper part of the river basin, as a consequence the different accessibility to urban area. Environment carrying capacity of every sub district areas in this river basin becomes lower as long as five years (1997-2003). In the upper part of the basin however, the index of environment carrying data (0.13) higher than in the lower part of this river basin (0.09), especially in the several sub districts surrounding urban area. The environment carrying capacity of Progo river basin depends on the land settlement and the growth of household number changes. However, influence of the land settlement area changes is stronger than the growth of household number changes to the environment carrying capacity. This result of research shows that spatial and temporal characteristics of settlement environment degradation in the lower and middle parts wider than in the upper part of Progo river basin in the coming twenty five of years
Geological Identification of Seismic Source at Opak Fault Based on Stratigraphic Sections of the Southern Mountains
Get PDFEarthquake 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
Island Identification at River Estuary Based on Toponymy (Case Study: River Estuary of Bulungan, BulunganRegency, North Kalimantan Province)
Get PDFToponymy is the scientific study of geographical names. Island Toponym represents step of island identi- fication by identifying its name and geographic position. Island Identification in toponymy was conducted through desk study and field survey. Desk study was implemented to obtain earlier description of islands physical condition, social and culture of local people. Field survey to obtain names of the islands was carried out by interviewing local people and positions were measured by using a simple GPS system then validated using nautical chart Dishidros publications 1997 and Image from Google Earth in 2013. The Survey at Bulungan Regency of East Kalimantan Province, 19 islands had been identified 7 islands which have not been listed at DEPDAGRI (Ministry of Internal Affairs) in 2004 but the other 10 islands have been named, and 9 island which is not drawn yet in sea chart published by DISHIDROS TNI-AL
Providing of Spatial Wetland Information for Supporting National Development
No full textThe wetland has a strategic role in national development. The potential uses of the wetland are varied such as for agriculture, fisheries, industries, and forestry. The intensive use of the wetland for agricultural development in Sumatera, Kalimantan, Sulawesi, and Papua through transmigration projects has been run since in 1973. Unfortunately, not all the projects were well developed, causing the social, economic, and physical environmental problems. These problems resulted in the negative impact for the life of the transmigration people. For that reason, the community empowerment for the unlucky transmigration people by handling the physical and non physical aspects is very important. This paper will describe the importance of providing spatial data and information biophysical wetland as an initial step in empowering people who live in the wetland resource
Infra Red Aerial Photograph Interpretation for Soil Erosion at Wuryantoro, Wonogiri
Get PDFCollecting data of soil erosion hazard terrestrially needs much time, high cost, and large energy. Therefore it is needed appropriate technology in addition to terrestrially decreasing necessity of time, cost and energy. Aerial photograph is picture of earth surface, which shape and place similar to condition on earth surface. Using aerial photograph in this research is expected to be able to take account for erosion factors. This research is conducted in Kecamatan Wuryantoro Kabupaten Wonogiri. Research method that used is aerial photograph interpretation with land unit approach. Amounts of soil lost are approached with USLE formula. Aerial photograph that used in this research is aerial photograph coloured infrared with 1:10.000 in scale and 1991 in year of taking photography. The result shows that using aerial photograph is very useful in supporting soil erosion rate calculation. Erosion rate at research area is 0.0968 ton/ha/year to 100.4344 ton/ha/year. This number is included in class of light erosion hazard
Teori-Teori Geografi: Pemikiran Kearah Pengembangan
Get PDFSampai saat ini masyarakat gcografi masih terlibat dalam pembicaraan dan perbedaan mengenai metodologi geografi. Patut diakui usaha itu telah melahirkan pemikiran-pemikiran baru dalam metodologi. Namun, tanpa disadari perdebatan yang cukup melelahkan itu telah melemahkan, bahkan ada kecenderungan meragukan kedudukan geografi sebagai cabang ilmu. Akibatnya, pengembangan teori-teori yang amat dibutuhkan dalam ilmu pengetahuan mengalami kelambatan
Morphometry Characteristics of Riverbed Sediment Grains as Basic Indicator Management of River Valley Environment (Case Study of Bogowonto River, Central Java)
Get PDFThis research aims to propose the usage of riverbed sediment grains roundness/flatness as basic indicator of river valley management. It is based on the evaluation of anomalous morphometry condition of sediment grains and valley condition along the river as one indicator of the stability of the riverbank of the river valley. This stability express the physical condition of the river valleys. In this paper, we provide methodological explanation as well as a case study in Bogowonto River. Analysis of the morphometry of sediment grain on riverbed from upstream to downstream as well as the relationship between the distance of the upstream and morphometry of sediment grains along Bogowonto River were conducted. Finally, we evaluated the anomalous condition as indicator of different environmental condition of the riverbank. We conducted three stages survey processes: preparation, fieldwork, and post-fieldwork. The preparation phase includes site selection, depiction of the main river channel of Bogowonto River, and the determination of the sample location. The distance between each sampling site was 5 km along Bogowonto River. The results show that there is anomalous morphometry of sediment grains found in the study area. The reason is that the channel of the segment of the river flowing over rocky riverbed of breccia along the 7.5 km, with hard and sharps edge grained of rock particles. This is accompanied by landslide the occurrence in the upper segment of the river. This is why the value of roundness and flatness indexes are changed significantly become lower value than the previous segment. This condition can be implemented to be used as indicator to basic management of landslide along a certain segment which indicated by the changing in roundness and flatness index values of the sediment grains.
Seasonal and Inter Annual Variation of Sea Surface Temperature in the Indonesian Waters
Get PDFSea surface temperature plays an important role in air-sea interactions. This research was conducted to understand seasonal and interannual variations of sea surface temperature in the Indonesian waters. The data used in this research was daily sea surface temperature in 1986 to 2015 which was obtained from the Physical Oceanography Distributed Active Archive Center - National Aeronautics and Space Administration. Method used in this study was the anomaly analysis. The result showed that the seasonal and interannual variations of sea surface temperature in the Indonesian waters varied. Seasonal variations of SST in the Makasar Strait, Sulawesi Sea, and Halmahera Sea were low. High seasonal variations of sea surface temperature occurred in the southern waters of Java, Timor Sea, Arafura Sea, and Banda Sea, which were allegedly due to the upwelling process. In addition, interannual variation of sea surface temperature in the Indonesian waters fluctuated. From 1986 to 2000, it showed a negative anomaly dominant. Meanwhile, from 2001 to 2015, it showed a positive anomaly dominant. The effect of Indian Ocean Dipole on the fluctuation of sea surface temperature in the Indonesian waters was stronger than ENSO. Within the last 30 years, the sea surface temperature in the Indonesian water indicated a rising trend. The highest sea surface temperature rise occurred in the Halmahera Sea that reached 0.66 OC/30 years and the lowest was in the Timor Sea of 0.36 OC/30 years
Residential Mobility di Pinggiran Kota Semarang Jawa Tengah (Studi Kasus Kaum Miskin Kota di Kota Semarang)
Get PDFThis research was aimed in analyzing and examining the development of slum residential in Semarang, including its center of the city urban, urban-fringe and sub-urban area. Within the development of the slum residential due to mobility of the urban poor, the phenomenon in the term of residential mobility occurred. Using both qualitative and quantitative methods, this research was applying distant-interpretation data in examining slum residential phenomenon and terrestrial data in analyzing both social and cultural issues related to development of slum residential. This research resulting a residential mobility model throughout areas of research, especially sub-urban including the Chinese cemetery area; the new migrant was the urbanist namely the bridge headers group, consists of tramp and hobos whom should be concerned more. Though they just have settled in short-period within the area, their income was categorized financially settled. They owned their own home not as the renter and even, built housing for their subordinates amounted 7-15 families in a complex of residential. Stability of the income was also supported by resident-owning whereas selecting its location based on the land-availability which initially settled the location illegally among the graves. This location was selected since its less-maintained condition by neither their descendant nor cemetery officer which then densely covered by bushes. Availability of the sufficient land leads them to build their residential which also used as the scrap collection space. During the times, their number was increased referred to their raising income. Legalizing their residential was the next step for their existence and sustainability by purchasing or renting the land. Eventually this bridge header was earning a stable income, owning their own home, and locating their residential in the sub-urban area furthermore but unfortunately less-supported by a highly established life style but an early category one . These were indicated by several factors, either employer or subordinate tramps which cooking foods altogether, unfashionably worn, and behavior of their youngster of asking consideration and advice to the consolidator and status seeker
Evaluasi Kemampuan Lahan Kecamatan Kedawung Kabupaten Sragen Jawa Tengah
Get PDFPenelitian ini bertujuan untuk mengklasifikasi dan mengevaluasi kelas kemampuan lahan, serta memetakan kelas kemampuan lahan Kecamatan Kedawung, Kabupaten Sragen, Jawa Tengah. Hasil akhir disajikan dalam Peta Kelas Kemampuan Laban skala 1:50.000. Klasifikasi kelas kemampuan lahan didasarkan pada jumlah skor factor-faktor lahan yang menguntungkan dan yang merugikan dari metoda Soepraptohardjo (1962 dengan modifikasi). Faktor-faktor lajan tersebut dinilai pada setiap satuan bentuk lahan. Satuan bentuk lahan diperoleh melalut interpretasi peta topografi, peta geologi dan pengama!an lapangan. Dari basil klasifikasi didapatkan bahwa daerah penelitian seluas 2375 hektar (49.1%) mempunyai kelas kemampuan lahan kelas I 2,400 hektar (49.6%) dengan kelas kemampuan lahan kelas II, dan 62.5 hektar (1.3%) mempunyai kelas kemampuan lahan kelas IV. Kemampuan laban Kelas I menyebar pada bentuk lahan Lembah Fluvial terkikis ringan dan Lereng Kaki Volkan terkikis Ringan, kelas II pada satuan bentuk lahan Lembab Fluvial terkikis sedang dan Lereng Bawah Volkan terkikis ringan, sedangkan Kelas IV terletak pada satuan bentuk lahan Lembab Fluvial terkikis berat. Adapun faktor penghambat pada kemampuan laban kelas II adalah erosi dan lereng, sedangkan pada Kelas IV adalah erosi, lereng, tanah dan batuan. Berdasarkan Faktor penghambat maka lahan ini termasuk dalam Sub-kelas II el dan Sub-kelas IV elsb