Bengkulu City is the center for almost all activities and has a high population growth rate. Because of the high population growth rate, human needs for space and land will increase. Land availability will continue to decline, while it cannot increase the existing area. This will impact the carrying capacity of the environment, so it needs predictions for land availability. This study used a spatial dynamics model which is an analysis of the dynamic system model and the suitability of the built-up area. The carrying capacity to reach excellent quality when the length of the built-up area is 30-70% of the total area that can be used. The results showed that the built-up area will reach 70% in 2030, which means it will exceed the environmental carrying capacity threshold. The results showed there were differences between the distribution patterns of built-up area in the spatial dynamics model and Spatial Planning Bengkulu City in 2032 at Kampung Melayu Subdistrict, Selebar Subdistrict, Singaran Pati Subdistrict, and Sungai Serut Subdistrict.
Pandeglang Regency is an area that has the potentiel to be hit by tsunamis. The plate subduction paths of Indo-Australia and Anak Krakatau Volcano make Pandeglang Regency a region with a high tsunami potential. One step that can be taken to overcome and minimize losses is to do spatial planning to protect it against potential tsunami damage. This research aimed to evaluate the spatial area of Pandeglang Regency based on the identification of potential tsunami hazards. The concept of modelling the tsunami inundation height developed by Berryman and based on Head Regulation No.4 of 2012 of the Indonesian National Board for Disaster Management has been used to identify potential tsunami hazards. The modelling was carried out by calculating the potential distribution of tsunami wave heights in coastal areas. Three scenarios were used to estimate the distribution. The results showed that the first scenario predicted a maximum tsunami height of 7.5 meters above sea level with the furthest tsunami inundation reaching 1,700.12 meters. Second scenario predicted maximum height of 15 meters, with the furthest tsunami inundation reaching 3,384.62 meters. Meanwhile, the last scenario was able to predict a height of 20 meters and showed the furthest tsunami inundation reaching 5.155,11 meters. These results proved that in all scenarios, the widest inundation would occur in Panimbang Regency. This is due to the relatively small variations in roughness and slope of the surface. The same condition also occurs in the last two scenarios, in which Sumur District was the area most ffected. Therefore, the spatial plan of Pandeglang Regency needs to be evaluated and the function of residential area changed to reduce and prevent large losses.
Earthquakes are still a major issue in Indonesia, one of the earthquake-prone areas is Lampung Province. There are many sources of earthquakes in Lampung, due to the influenced by the Indo Australian Plate against the Eurasian Plate, Semangko Fault, and Tarahan Fault. Tarahan Fault that passes through Pringsewu district and Bandar Lampung City is an active fault where the west side of the fault force moves to the northeast. Judging from the occurrence of the earthquake so far, it should be taken into account the possibility that there is a large buildup of energy in the Lampung area, one of them in Pringsewu. One of the efforts in earthquake disaster mitigation is to know the level of vulnerability, in this study based on its social aspects. This social vulnerability can be known through social vulnerability analysis or Social Vulnerability Index (SOVI). This analysis uses a comparative matrix that gives a broad picture of social vulnerability relative to earthquake hazards. The results showed that the regions with very high social vulnerability were in Gading Rejo Subdistrict while the low social vulnerability was in Ambarawa, Banyumas and Adiluwih Subdistricts.
The presence of women migrants in urban industrial workers proved that women's movement exists. This migration process not only indicates that women are actively involved in economic activity, but also influences the decision-making on important activities within the family and society. This study aims to determine the relationship between mobility patterns and its contribution to economic and decision-making in the family through the survey as research methods. The data were analysed by descriptive analysis, statistics approach, and correlation maps. For the independence test in the bivariate table, we used the chi square method, and to display the distribution of two variables simultaneously, a cross-tabulation was used. After that, to assess whether there is a relationship between the two variables, the table of independence was used. Our study shows that decision-making became an indicator of strengthening the role of women with a pattern of circular migration, which has a relationship on economic contribution. However, the behavior of women who perform the spatial migration in strengthening roles in families is not always relevant with the strengthening role of the economy. A strong role is only demonstrated by industrial migrant workers working on a circular migration pattern.
Indonesia merupakan salah satu negara dengan kekayaan biodiversitas mangrove terbesar di dunia. Tujuan dari penelitian ini adalah untuk mengetahui adanya perubahan sebaran mangrove di Laut Banten Utara yang diduga akibat adanya tumpahan minyak. Penelitian ini dilakukan dengan konsep pemodelan data menggunakan bantuan software ArcGIS Pro. Kemudian data dianalisa berdasarkan data band inframerah pada formula NDVI (Normalized Difference Vegetation Index) untuk dapat dilakukan analisa deskriptif.. Hasil penelitian ini menunjukan luas tutupan mangrove pada tahun 2018 sebesar 223,67 Ha dengan kerapatan berkisar antara 0.046-0.399, luas tutupan mangrove bulan Agustus tahun 2019 sebesar 230,32 Ha dengan tingkat kerapatan 0.134-0.400, sedangkan luas tutupan mangrove bulan Agustus 2020 sebesar 229,08 Ha dengan tingkat kerapatan berkisar antara 0.086-0.457. Adapun penyebab berkurangnya luasan mangrove pada pantai Kecamatan Tirtayasa diduga diakibatkan oleh tumpahan minyak yang terjadi, serta adanya aktifitas pemanfaatan pohon mangrove oleh masyarakat. Tingkat sebaran mangrove yang di Laut Banten Utara yang beragam memberikan manfaat yang dinamis bagi ekosistem hayati dan non-hayati disekitarnya. Kesimpulan dari hasil penelitian ini menunjukan bahwa telah terjadi perubahan luas sebaran dan tingkat kerapatan mangrove di Laut Banten Utara yang kemungkinan disebabkan oleh kegiatan deforestasi dan pencemaran limbah tumpahan minyak pada tahun 2019-2020.
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