Green open space is one of the most important land uses, especially in densely populated urban areas. Public Green Open Land in each area regulated in Law No. 1 of 2007 is at least 20%. Based on data from the Department of Creative Works, Land and Spatial Planning as well as the Environment Agency of DKI Jakarta, West Jakarta's Green open space asset area is 277.45 Ha of the total area of West Jakarta, which is 12543 Ha. There is a need for a study to determine the potential land for green open space in West Jakarta to catch up on the fulfillment of public green open space based on spatial and regional analysis. One of the GIS-based methods that can be used to determine potential green open space is the decision tree method. This method uses AHP analysis in its formulation based on experts in the relevant agencies. In total there are 8 parameters that influence in determining potential green open space in West Jakarta, namely flood risk, air quality, population, distance to roads, distance to water sources, building density and distance to green open space assets. The modeling results are divided into five classes ranging from very priority to not priority. The total area of land that is much prioritized to be used as green open space is 95.57 hectares spread out. The modeling results show that there are still potential lands to be used as green open spaces in West Jakarta.
For centuries East Java is one of the tribes in Indonesia that has a unique cultural treasure. This culture has been passed down from generation to generation since the days of the kingdom. Model approach in this research is leading to a descriptive qualitative ethnographic, in which the empirical reality a result, demanding researchers go directly to the location of the study, to be able to live up to their tradition, and the symptoms of everyday life that is full of social phenomena local culture. The relation between construction is a structure which is strongly influenced by the manifestation process mythology and cosmology Java). This means that the traditional Javanese house is not just a place to shelter (practical function), but also understood as a manifestation of the ideals and outlook on life or a symbolic function. In this case the traditional Javanese houses are not only placed as an autonomous element, a separate stand alone, but being seen in context, particularly relevant to the context of allied Javanese cosmology that underlie the view that the Javanese philosophy of life.
Kota Semarang merupakan kota metropolitan yang memiliki tingkat bahaya amblesan tanah mencapai 14-19 cm/tahun pada lokasi tertentu (Abidin et al, 2010). Penyebab kritis terjadinya peningkatan amblesan tanah adalah meningkatnya kawasan terbangun secara masif di kawasan pesisir dan eksploitasi pengambilan air tanah, khususnya di Semarang Utara. Penelitian ini bertujuan untuk mengetahui perubahan lahan yang terjadi pada tahun 2004 dan tahun 2013 dan untuk mengetahui indeks bahaya amblesan tanah di penggunaan lahan wilayah studi. Metodelogi yang muncul dalam penentuan land subsidence dengan sebuah konsesus melalui Analytic Hierarchy Process (AHP). Penentuan item yang digunakan mempertimbangkan adanya ancaman/bahaya, tingkat kerentanan, dan risiko. Hasil penelitian menunjukkan bahwa beberapa faktor termasuk penggunaan lahan menjadi penyebab amblesan tanah di wilayah studi. Persentase perubahan lahan sebesar 49,99% untuk perubahan lahan kosong menjadi lahan yang akan dibangun dan industri pergudangan. Faktor-faktor utama yang menjadi penyebab amblesan tanah berdasarkan kuesioner adalah penurunan Muka Air Tanah (MAT) dengan persentase sebesar 61% dan perubahan lahan dengan persentase sebesar 19 %. Penelitian ini menghasilkan rekomendasi baik bersifat teknis maupun non-teknis.
Bahaya material piroklastik gunungapi merupakan ancaman serius bagi masyarakat karena menghasilkan dampak-dampak yang tidak diinginkan bagi wilayah di sekitarnya. Erupsi Gunungapi Sinabung yang terjadi pada tahun 2014 sangat banyak merusak area pertanian masyarakat yang berada di kawasan Gunungapi Sinabung. Kabupaten Karo, Provinsi Sumatera Utara merupakan area yang paling parah terkena dampak bahaya material piroklastik pada erupsi Gunungapi Sinabung tahun 2014 (PVMBG, 2014). Ada 4 kecamatan yang berbatasan langsung dengan Gunungapi Sinabung yaitu Namanteran, Simpang Empat, Payung dan Tiganderket. Penggunaan lahan lain yang juga terkena dampak bahaya Gunungapi, diantaranya kawasan permukiman, perkebunan, dan hutan. Penelitian ini bertujuan untuk melakukan penilaian kawasan rawan bahaya material piroklastik gunungapi terhadap penggunaan lahan dan memberikan rekomendasi penggunaan lahan berbasis mitigasi bencana. Pemetaan daerah rawan bencana dibuat berdasarkan data kejadian erupsi Gunungapi Sinabung pada tahun 2014 dan data distribusi penggunaan lahan. Selanjutnya dilakukan kuantifikasi bahaya jatuhan material piroklastik Gunungapi Sinabung disusun berdasarkan ambang batas beban massa material piroklastik yang dapat ditoleransi oleh penggunaan lahan tertentu. Seluas 18.420,48 Ha atau 56,6 % area pertanian yang meliputi kebun, ladang dan sawah memiliki probabilitas tinggi beban massa pada nilai kritis 10 kg/m2. Area pertanian yang paling banyak berpotensi terdampak bahaya jatuhan material piroklastik adalah kecamatan Tiganderket dan Namanteran masing-masing seluas 9.272,29 Ha dan 6.891,21 Ha. Desa paling tinggi terdampak di Kecamatan Namanteran yaitu Desa Kutagugung (3.172,93 Ha) dan di Kecamatan Tiganderket yaitu Desa Kutakepar (4.430,03 Ha). Dengan demikian dari hasil penilaian bahaya ini dapat menjadi acuan dalam penyusunan rencana mitigasi bencana Gunungapi Sinabung.
Indonesia is an archipelagic country which is divided into development corridors. The development corridor has been stipulated in the MP3EI development master plan, including Java Island. Java is the center of the country's development activities with nearly 60% of the population living on this island. There are 5 metropolitan cities, one of which is the State Capital, namely Jakarta. Through this paper, it will be studied regarding the study of the existing condition of the Java development corridor, namely Jakarta -Surabaya, the challenges and opportunities as well as the development plan. Java well known as developed into industrial center such as electronic, automotive and big scale industries.
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