66 research outputs found

    Pemetaan Kerentanan Bencana Gunung Bromo Dengan Citra Sentinel-1 Menggunakan Metode Interferometric Synthetic Aperture Radar (Insar)

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    Volcanic eruptions is a natural disaster that produces a wide impact on disaster affected areas.The losses suffered from volcanic eruption are not small. The threat of volcanic eruption can be minimized by making disaster vulnerability maps in areas prone to volcanic eruption. Mount Bromo is a volcano that still active and famous as one of the best tourist destinations in Indonesia. Vulnerability disaster map of Mount Bromo is needed to minimize the losses that can occur in the tourist area of Mount Bromo. The vulnerability disaster mapping of Mount Bromo using GIS (geographic information system). The vulnerability map is created using vulnerability parameters of social and enviromental that refers to PERKA BNPB no.2 year 2012. The vulnerability parameters are combined and weighted to produce disaster vulnerability maps. Remote sensing technology using Sentinel-1 imagery to obtain lava flow pattern form digital elevation model (DEM) that obtained from InSAR process. Landsat-8 imagery used to obtain land cover with Supervised Maximum Likelihood classification. Lava flow and land cover data overlay to become a disaster prone map area of Mount Bromo. This research produces maps with information of vulnerability level of Mount Bromo. Low vurnerability area of 4346,009 hectare (86,018%), medium area of 694,920 hectare (13,754%) and high level area of 11,528 hectare (0,228%). The impact of eruption of Mount Bromo with lava flows with radius of 25, 50 and 75 meters of the most exposed land cover with lava eruption is brown sand with percentage of exposed lava flow compared with other land cover reaches 30%. The most disaster-prone areas affected by a radius of 0,3 – 2,5 kilometers are white sand and for a radius 2,5 -5 kilometers is brown sand. reliability of the vulnerability map of Mount Bromo disaster with reference research at a good reliable level because the parameters used are adjusted to the condition on Mount Bromo which is rarely settled up to a radius of 5 kilometers. This research is expected to provide information to the citizens, tourists and local goverment regarding the vulnerability of Mount Bromo so that it can be a reference to improve the readiness and alertness in facing threat of eruption at Mount Bromo

    Pemanfaatan Lidar untuk Evaluasi Ketinggian Bangunan di Kawasan Jalan Pandanaran, Semarang

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    Kota Semarang merupakan ibukota Provinsi Jawa Tengah sekaligus kota metropolitan terbesar kelima di Indonesia setelah Jakarta, Surabaya, Medan dan Bandung. Kota Semarang terus mengalami perkembangan dan pembangunan kota. Perkembangan dan pembangunan kota yang terjadi menyebabkan berdirinya bangunan gedung secara pesat. Oleh karena itu, pembangunan di Kota Semarang membutuhkan pengontrolan terhadap kesesuaian penataan ruang yang ditetapkan oleh Pemerintah Daerah. Penataan ruang merupakan suatu sistem perencanaan dan pemanfaatan ruang yang perlu dikendalikan dalam proses pengembangan suatu kawasan. Penelitian ini berfokus pada tinggi bangunan gedung di kawasan Jalan Pandanaran Kota Semarang, dengan melakukan evaluasi terhadap Peraturan Daerah (Perda) Kota Semarang Nomor 14 Tahun 2011 dan Peraturan Menteri Perhubungan Nomor KM 35 Tahun 2008. Penelitian ini menggunakan pendekatan data DEM LiDAR untuk memperoleh tinggi bangunan secara aktual. Tinggi bangunan yang melebihi ketentuan dari Peraturan Daerah (Perda) Kota Semarang Nomor 14 Tahun 2011 dan Peraturan Menteri Perhubungan Nomor KM 35 Tahun 2008 dianggap sebagai bangunan melanggar. Pelanggaran tersebut terjadi pada 3 bangunan gedung, yaitu Bank Panin, Louis Keinne Hotel, dan Menara Suara Merdeka. Nilai pelanggaran yang terjadi untuk ketinggian bangunan di Kawasan Jalan Pandanaran sebesar 2,65 %. Maka nilai kesesuaian hasil evaluasi tinggi bangunan tersebut mencapai dari 97,35 %

    Analisis Pengaruh Total Suspended Solid Dalam Penentuan Kedalaman Laut Dangkal Dengan Metode Algoritma Van Hengel Dan Spitzer

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    Remote sensing technology can provide depth information effectively and efficiently, especially for areas that have seabed morphology are often fickle. But to extract depth data there are some factors that will cause an error in the determination of the depth value.In this study used a method of determining the depth of the shallow sea with Landsat images using the Van Hengel and Spitzer which is ever used by Wahyuningrum et.al, 2008, to determine the ability of the digital image of Landsat 7 ETM + to map shallow water depth at Pari Island. And Lestari, 2009 using the method of determining the concentration of TSS to see the trend change and transparency TSS in Jakarta Bay waters. While in this study both methods are used to assess the effect of TSS to determine the depth of the shallow marine waters of Marina using VHS method in Semarang with Landsat satellite imagery 8 OLI in 2013.The Results of Landsat image processing using VHS method obtained depth values between 3-13 m with R2 (coefficient of determination) 0,7127 and RMS error 1,2929. whereas for determining the TSS concentration obtained TSS concentrations between 1-181 mg/l with value of R2 (coefficient of determination) 0,8669 and RMS error 14,1668. At a depth of < 3 m between the depths of field with a large image obtained difference 11,013 m. it is influenced by high TSS concentrations as it is close to the coast. And at a depth of more than 13 m, the difference in the depth increased again 24,090 m with the deepening of the sea floor

    Analisis Kesuburan dan Pencemaran Air Berdasarkan Kandungan Klorofil-a dan Konsentrasi Total Suspended Solid secara Multitemporal di Muara Banjir Kanal Timur

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    Along with the increase of population, resulting the amount of waste produced increase. This causes more contamination of water, soil and air. One of waters that has been contaminated by waste is the East Flood Canal where it is located in the coastal area that often serve as a place of domestic waste and household waste which is often dumped into the river. Therefore it is necessary that the existance of information for the water quality assessment in the estuary of the East Flood Canal. One of the parameters to assess the water quality are Chlorophyll-a and Total Suspended Solid.A study conducted in April 2016 had the objective to determine the distribution of fertility and water pollution that is based on the content of chlorophyll-a and Total Suspended Solid. In this research, random sample points was taken in the estuarine waters of East Flood Canal. Furthermore, the sampling result will be tested in laboratory to get the content value of chlorophyll-a and TSS concentrations, from the value of laboratory tests, later it could be used as the basis for processing the content of korofil-a and TSS concentration on Landsat satellite imagery.The results shows that the fertility distribution of water in 2003, 2014 and 2016 is dominated by the oligotrof trophic status (0-2 mg / l) and the lowest trophic status in 2003, 2014 and 2016 respectively occupied by the eutrof trophic status (5 -15 mg / l), mesotrof (2-5 mg / l) and hipereutrof (β‰₯15 mg / l). While for the concentration of TSS in 2003, 2014 and 2014 were dominated by light polluted area with the content value of 84-504 mg / l and the lowest pollution index is occupied by a medium polluted category that contains TSS in the range of 504-5048 mg / l
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