Abstrak: Analisis spasial tipologi kerusakan lahan dapat memberikan gambaran bagaimana perilaku masyarakat pada masa sebelumnya dan dapat digunakan menjadi indikator bagaimana masyarakat memperlakukan sumberdaya lahan masa kini dan masa akan datang.Tulisan ini bertujuan untuk mendeskripsikan analisis spasial tipologi kerusakan lahan berbasissistem informasi geografis. Penelitian dilaksanakan di kawasan perbukitanpegunungan Kulonprogo DIY. Pendekatan penelitian secara kuantitatif dan kualitatif.Satuan analisis rumahtangga tani dan satuan bentuklahan.Penelitian dilakukan dengan menggunakan survai dan wawancara mendalam.Hasil penelitian menunjukkan bahwa tipologi tingkat kerusakan lahan aktual lebih rendah dibanding dengan tipologi tingkat kerusakan lahan potensial, yang berartitingkat kerusakan lahan potensial tidak selalu berbanding lurus dengan tingkat kerusakan lahan aktual.Faktor kearifan lokal di daerah penelitian berperan penting dalam pengelolaan lahan pertanian.Kata kunci :tipologi kerusakan lahan, SIG Abstract: Analysis of spatial typology of land demage can give an idea on how community behavior was and can be used as an indicator of how society treats the land resources now and for the future. This paper aims to describe the spatial analysis of land demage typology based on geographic information system. The research was carried out in the hillmountainous area of Kulonprogro, DIY. The approach was a mix of quantitative and qualitative research. The units of analysis are farm households and landform units. The study was conducted using survey and in-depth interviews. The results show that the typology of land demage rate is lower than the actual level typology of potential land demage, which means the level of potential land demage is not always directly proportional to the level of actual land demage. The factor of local wisdom in the study area plays an important role in the management of agricultural land.
The purpose of this study is to examine how to determine priority areas for an implementation of landslide mitigation based on disaster risk assessment in Semarang city Central Java. The results of the interviews with the employees of BPPD Semarang city indicate that in mitigation landslide disaster to the sub-district level or to the village, officers do not have clear guidelines on which region should be socialized about landslide disaster first or as a priority. To determine the level of landslide risk variation, there needs to be threat data, vulnerability and community capacity. The availability of threat data, vulnerability, and community capacity is useful in determining priority areas for disaster mitigation implementation. Analytical technique used in this research is map overlay with ArcGIS 10.3 program. Data on threats, vulnerabilities and community capacities are mapped, then overlaid to produce landslide risk maps. Furthermore, landslide risk maps are covered with population density maps or settlement density maps to obtain priority areas for landslide mitigation. Areas with a very high risk of landslide disaster occupy the priority 1, followed by areas with the high landslide risk as priority 2 and areas with the risk of landslide disaster are in the 3rd priority.
Abstract. This research is conducted in the district of Banyumanik Semarang. The objectives of this study are; (a) recognising the distribution of landslide-prone residencies in the district of Banyumanik; (b) recognising the community efforts in dealing with their landslide-prone residency environment. The sample is taken by Purposive Sampling Technique, i.e. by considering the possibility of an area to landslide. The researched variables are (1) Physical parameter of landslide-prone field in residency environment, (2) The efforts accomplished by the community to overcome landslide-prone environment. The result of this research has varied in five categories. They are residencies with very high, high, medium, low and very low of landslide-prone. Two countermeasures from the community to prevent landslide are; (1) physical prevention, covering: constructing embankments and drainage channels, sealing/covering cracks on the ground, building blocks, planting hardwood plantations, and (2) partnership prevention, a cooperation between the community with the related institution, such as disaster socialization and land use planning. IntroductionIn consideration of establishing the synergy of the nature productivity and sustainability, the development of settlements needs to be integrated directed. Choosing the right location for the settlement has a strategic meaning, and important in spatial aspect [1]. This may also determine the lastingness of the building, its economic value, and its impact on the surrounding environment.The yearly increase of Indonesian population has brought its consequence towards the increasing needs of settlements as living space. In contrast, the limited land for housing has caused many buildings and facilities constructed on unfavorable locations, where the inhabitants may get endangered for they are located in a disaster-prone landslide area.Landslides occur because of the movement of land or rocks along or out of the slopes due to gravity. Landslide is caused by three main factors: (1) Inherence factors, cover the depth of rocks weathering, geological structures, soil solum thickness, soil texture, and soil permeability. (2) External factors of an area, such as, the incline of hill, number of steep walls, the incision density, and land use. (3) Prompt factors, the high intensity of rainfall, and earth quakes [2].It requires a regional information in any regional development planning, whether for resettlement or other uses. Thus, considering a continuously changing of information, therefore, a quick storing, as well as editing, and analyzing system is needed.
The population in Semarang City is increasing in number. The limited area of settlements has caused many settlements to be established in unfavorable locations, which are located in landslide prone areas. The purpose of this study is (1) Determine the distribution of settlement environments prone to landslides with the help of GIS (Geographic Information System) technology in the Ngaliyan District of Semarang City, (2) Analyze community efforts in tackling settlements that are prone to landslides.The variables studied were: (a) terrain physical including: slope, soil texture, density (number) incision, land use, rock weathering depth, steep walls, soil solum, soil permeability, vegetation density, rock weathering, structure rock lining, rock strength, groundwater depth, concentration of springs / seepage, and rainfall; (b) Land use for settlements. Data was collected through field surveys. Data analysis with scoring, and overlaying with GIS technology. The total score is used to determine the distribution of landslide prone areas. Landslide hazard maps are then overlay with residential land use maps with the ArcGIS program, so that maps of residential areas prone to landslides can be obtained.
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