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DETEKSI GEJALA ERUPSI STROMBOLIAN GUNUNGAPI RAUNG JAWA TIMUR MENGGUNAKAN NORMALIZED THERMAL INDEX DARI DATA MODIS (DETECTING THE PRECURSOR OF RAUNG VOLCANO STROMBOLIAN ERUPTION USING NORMALIZED THERMAL INDEX FROM MODIS) Suwarsono, -; Hidayat, -; Suprapto, Totok; Yulianto, Fajar; Sari, Nurwita Mustika; Parwati, -; Asriningrum, Wikanti
Jurnal Penginderaan Jauh dan Pengolahan Data Citra Digital Vol. 12 No. 2 Desember 2015
Publisher : Indonesian National Institute of Aeronautics and Space (LAPAN)

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Abstract

Secara geologi, sebagian besar wilayah Indonesia berada pada jalur subduksi cincin api pasifik (pacific ring of fires) yang menyebabkan banyak bermunculan gunungapi aktif. Keberadaan gunungapi aktif tersebut membawa implikasi tersendiri akan munculnya ancaman erupsi vulkanik yang sewaktu-waktu dapat terjadi. Penelitian ini bertujuan untuk mendeteksi gejala erupsi gunungapi dengan menggunakan parameter Normalized Thermal Index (NTI) yang diturunkan dari data MODIS. Obyek gunungapi yang dipilih adalah Gunungapi Raung di Jawa Timur dimana sekitar Juni hingga Juli 2015 menunjukkan peningkatan aktivitas vulkanisme serta mengalami erupsi. Metode pengolahan data meliputi pengolahan citra Landsat-8 untuk penentuan area of interest (kaldera), pengolahan citra MODIS untuk pengukuran NTI, serta analisis pola spasial dan temporal NTI. Hasil penelitian menunjukkan bahwa gejala suatu gunungapi akan mengalami erupsi dapat diketahui dari adanya nilai NTI pada daerah kaldera yang meningkat dan relatif lebih tinggi dari daerah di sekitarnya. Parameter NTI telah teruji memiliki kemampuan yang baik dalam membedakan antara kaldera yang sedang meningkat aktivitas vulkaniknya dan obyek-obyek lainnya. Nilai NTI = 0,06 dapat diterapkan sebagai nilai ambang batas (threshold) suatu gunungapi menunjukkan gejala akan erupsi.Kata kunci: Gejala erupsi, Gunungapi Raung, Strombolian,MODIS, NTI
PEMANFAATAN DATA MODIS UNTUK IDENTIFIKASI DAERAH BEKAS TERBAKAR (BURNED AREA) BERDASARKAN PERUBAHAN NILAI NDVI DI PROVINSI KALIMANTAN TENGAH TAHUN 2009 Suwarsono, -; Yulianto, Fajar; Parwati, -; Suprapto, Totok
Jurnal Penginderaan Jauh dan Pengolahan Data Citra Digital Vol 6, (2009)
Publisher : Indonesian National Institute of Aeronautics and Space (LAPAN)

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Abstract

Land and forest fire are the natural disasters that often occur in Indonesian regions, especially Sumatera and Kalimantan. The disasters cause deep impacts to environments and human beings, so it is necessary to conduct mitigation. The research area took place in Central Kalimantan Province. The objective of the research is to applicate the MODIS remote sensing imagery for supporting the land and forest fire mitigation efforts, that is identifying the burned area. The analyzing is done by using methods of NDVI changes before and after land and forest burned periods in 2009 . The stages of the research consist of; fire hotspot frequency analyzing, NDVI changes calculation, threshold of NDVI changes establishing, and burned area estimation based on the threshold result. The results of the research show that the burned area in Central Kalimantan can be identified by using MODIS based on NDVI changes. The total numbers of burned area in 2009 are 122.900 hectares, most of them occured in Pulangpisau, Kapuas, Katingan and Kotawaringin District. The results are needed to be verified in the next further research based on the field survey and or by using the high resolution imageries such as Landsat, SPOT-2 or 4, ALOS, Ikonos or Quickbird. Key Words: MODIS, Burned Area, NDVI, Central Kalimantan
OBSERVING THE INUNDATED AREA USING LANDSAT-8 MULTITEMPORAL IMAGES AND DETERMINATION OF FLOOD-PRONE AREA IN BANDUNG BASIN Yulianto, Fajar; Suwarsono, NFn; Sulma, Sayidah; Khomarudin, Muhammad Rokhis
International Journal of Remote Sensing and Earth Sciences (IJReSES) Vol 15, No 2 (2018)
Publisher : National Institute of Aeronautics and Space of Indonesia (LAPAN)

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Abstract

Flood is the most frequent hydro-meteorological disaster in Indonesia. Flood disasters in the Bandung basin result from increasing population density, especially in the Citarum riverbank area, accompanied by land use changes in upstream of the Citarum catchment area which has disrupted the river’s function. One of the basic issues that need to be investigated is which areas of the Bandung basin are prone to flooding. This study offers an effective and efficient method of mapping flood-prone areas based on flood events that have occurred in the past through the use of historical remote sensing image data. In this research, Landsat-8 imagery was used to observe the inundated area in the Bandung basin in the past (2014–2018) using an improved algorithm, the modified normalized water index (MNDWI). The results of the study show that MNDWI is the appropriate parameter to be used to detect flooded areas in the Bandung basin area that have heterogeneous land surface conditions. The flood-prone area was determined based on flood events for 2014 to 2018, identified as inundated areas in the images. The estimation of the flood-prone area in the Bandung basin is 11,886.87 ha. Most of the flood-prone areas are in the subdistricts of Rancaekek, Bojongsoang, Solokan Jeruk, Ciparay, Cileunyi, Bale Endah and Cikancung. This area geographically or naturally is a water habitat area. Therefore, if the area will be used for residential, this will have consequences that flood will always be a threat to the area. 
PENYUTRADARAAN PROGRAM DOKUMENTER EXOTIC TEMPLE ‘SUKUH’ DENGAN TIPE PEMAPARAN EXSPOSITORY Yulianto, Fajar
Saraswati Jurnal Ilmiah Mahasiswa S1 FSMR
Publisher : Saraswati

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Abstract

Exotic Temple ‘Sukuh’ adalah sebuah program televisi yang dikemas dalam format dokumenter. Program ini memaparkan fakta-fakta pada bangunan komplek candi Sukuh dengan menerapkan tipe pemaparan exspository. Tipe pemaparan exspository adalah salah satu gaya pada program dokumenter yang memakai penutur tunggal sebagai penutur cerita.Candi Sukuh sebuah bangunan cagar budaya yang masih tergolong muda yang memiliki banyak perbedaan dengan bangunan percandian lainnya. Karya dokumenter Exotic Temple ‘Sukuh’ disajikan dengan mendeskripsikan sejarah, bentuk dan kaitan dengan ajaran pada masanya. Konsep estetik pada karya dokumenter ini disajikan dengan pengambilan gambar yang indah dan penyajian alur cerita yang bertingkat.Dokumenter ini memunculkan fakta-fakta yang lebih informatif untuk dapat diketahui masyarakat luas pada sebuah bangunan suci. Fakta-fakta disajikan dengan penuturan dari narasumber yang dapat dipertanggungjawabkan. Sehingga informasi yang lebih jelas untuk menilai peninggalan cagar budaya, dalam tanda kutip candi Sukuh dapat terbuka dan mengedukasi penonton dalam melihat fenomena keindahan dalam sebuah banguan suci.Kata Kunci : Dokumenter, Exspository, Candi Sukuh
KAPASITAS INDEKS LAHAN TERBAKAR NORMALIZED BURN RATIO (NBR) DAN NORMALIZED DIFFERENCE VEGETATION INDEX (NDVI) DALAM MENGIDENTIFIKASI BEKAS LAHAN TERBAKAR BERDASARKAN DATA SPOT-4 Parwati, Parwati; Zubaidah, Any; Vetrita, Yenni; Yulianto, Fajar; DS, Kusumaning Ayu; Khomarudin, M Rokhis
GEOMATIKA Vol 18, No 1 (2012)
Publisher : Badan Informasi Geospasial in Partnership with MAPIN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1996.976 KB) | DOI: 10.24895/JIG.2012.18-1.193

Abstract

Pada penelitian ini, kapasitas indeks Difference Normalyzed Burn Ratio (dNBR) dan indeks Difference Normalized Vegetation Index (dNDVI)  sebagai indeks lahan terbakar telah dianalisis untuk mengidentifikasi lahan bekas terbakar di wilayah Provinsi Riau berdasarkan data SPOT-4. Baik dNBR maupun dNDVI merupakan selisih antara indeks NBR atau NDVI sebelum terjadi kebakaran (pre-fire) dengan sesudah terjadi kebakaran (post-fire). Data time-series SPOT-4 yang digunakan adalah periode Juli 2009, Oktober 2010, Maret 2011, Juni 2011 dan Juli 2011. Hasil analisis menunjukkan bahwa nilai ekstraksi NDVI atau NBR pada kondisi pre-fire mempunyai nilai yang lebih tinggi dibandingkan dengan lahan pada kondisi post-fire. Umumnya hal tersebut menunjukkan adanya perubahan dari tingkat kehijauan vegetasi yang tinggi menjadi rendah. Berdasarkan hasil verifikasi di lapangan (Agustus 2011), ternyata pada lahan bekas terbakar indeks dNBR (0.42) menunjukkan nilai yang lebih tinggi dibandingkan dengan dNDVI (0.19). Sementara di lokasi pembukaan lahan/hutan tanpa membakar, indeks dNDVI (0.53) lebih tinggi dibandingkan dNBR (0.05). Hal tersebut membuktikan bahwa indeks dNBR sangat sensitif dalam mengidentifikasi lahan bekas terbakar yang menghandalkan spektrum radiasi Shortwave Infrared (SWIR) yang peka terhadap rendahnya kadar air di lahan bekas terbakar. Sementara indeks dNDVI lebih cocok digunakan untuk mendeteksi perubahan lahan dari vegetasi ke non vegetasi tanpa membakar.Kata Kunci : SPOT-4, lahan bekas terbakar, dNBR, dNDVI, Riau ABSTRACTIn this study, Difference Normalyzed Burn Ratio (dNBR) and Difference Normalized Vegetation Index (dNDVI) derived from SPOT-4 images were analyzed for identifying burn scar in Riau Province.The dNBR and dNDVI are the differences between NBR or NDVI in pre-fire condition and in post-fire condition. The time-series SPOT-4 images used in this study  have accusition month onJuly2009, October 2010, March 2011, June 2011, and July 2011. Results show that both NDVI and NBR have higher values in pre-fire rather than in post-fire condition. Generally, it shows the change in green vegetation level from high in vegetation cover to lower level in burnt area. However, by referring to field survey data (August 2011), the dNBR (0.42) shows higher value than the dNDVI (0.19) in burnt area. The indices were also applied in opened land/forest without burning activity which showed higher dNDVI (0.53) values rather than dNBR (0.05). Therefore, it has been proved that the dNBR index is more suitable to identify burnt area which has Shortwave Infrared (SWIR) spectrum that is more sensitive to moisture content in burnt area. Meanwhile the dNDVI could be used to identify forest changes to non forest cover without burning activitiy.Key Words : SPOT-4, burn scar, dNBR, dNDVI, Riau
MODEL SIMULASI LUAPAN BANJIR SUNGAI CILIWUNG DI WILAYAH KAMPUNG MELAYU–BUKIT DURI JAKARTA, INDONESIA Yulianto, Fajar; Marfai, Muh Aris; Parwati, -; Suwarsono, -
Jurnal Penginderaan Jauh dan Pengolahan Data Citra Digital Vol 6, (2009)
Publisher : Indonesian National Institute of Aeronautics and Space (LAPAN)

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Abstract

Jakarta is the biggest city in Indonesia located in the north-western of Java Island and between 5º59’–6º00’S and 106º30’–107º00’E. The total area is approximately 661,52 km2, and the population is more than 9 million in 2008. The occurrence of many flood in Jakarta had caused loss in properties, environmental degradations, and warsen communities health. A spatial approach model is applied to understand the effects of flood to land use in the research area. Objectives of the research are : 1) to create the hazard assessment model and 2) to calculate the impact of flood to the land use area. The methods consist of neighbourhood operation application development in the form of raster pixel calculation, in this case are the Digital Elevation Model values, by using mathematic calculation formula to assign the inundated area. Land uses, either the inundated or others, are the result of imagery data interpretations. Results of the research show that the simulation model represent the condition in the field when flood happened maximum scenario for inundation area of 2,00 m will affect to about 5,10 Ha (regular settlements); 80,82 Ha (irregular settlements); 2,22 Ha (open areas); 5,09 Ha (business areas); 40,39 Ha (office areas) and 18,83 (roads). Key words: Ciliwung flood, DEM, Iteration spatial model, GIS, Remote sensing
Improving the accuracy and reliability of land use/land cover simulation by the integration of Markov cellular automata and landform-based models __ a case study in the upstream Citarum watershed, West Java, Indonesia Yulianto, Fajar; Suwarsono, Suwarsono; Sulma, Sayidah
Journal of Degraded and Mining Lands Management Vol 6, No 2 (2019)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2019.062.1675

Abstract

Land use/land cover (LULC) is one of the important variables affecting human life and the physical environment. Modelling of change in LULC is an important tool for environmental management and for supporting spatial planning in environmentally important areas. In this study, a new approach was proposed to improve the accuracy and reliability of LULC simulation by integrating Markov cellular automata (Markov-CA) and landform-based models. Landform characteristics, positions and patterns influence LULC changes that are important in understanding the effects of environmental change and other physical factors. The results of this study showed that integration of Markov-CA and landform-based models increased correct rejection as a component of agreement and reduced incorrect hits and false alarms as components of disagreement for the percentage of the study area in each resolution (multiple of native pixel size). Correctly simulated hits as a component of agreement change also increased, even though nine of the 18 pairs of three-map comparisons showed a decline in this aspect. Meanwhile, misses as a component of disagreement change simulated as persistence also increased, although six of the 18 pairs of data showed a decline. Based on the overall three-map comparison analysis, there was an increase in the figure of merit (FOM) values after the Markov-CA and landform-based models were integrated, although six of the 18 pairs of data indicated a decrease in FOM values. This indicates improved results after integration of Markov-CA and landform-based models.
APLIKASI MODEL PROBABILISTIK UNTUK SIMULASI ALIRAN MATERIAL ERUPSI STUDI KASUS: GUNUNG MERAPI, JAWA TENGAH (APPLICATION OF PROBABILISTIC MODEL FOR ERUPTION MATERIAL FLOW SIMULATION CASE STUDY: MERAPI VOLCANO, CENTRAL JAVA) Yulianto, Fajar; Parwati, -
Jurnal Penginderaan Jauh dan Pengolahan Data Citra Digital Vol 9 No.1 Juni 2012
Publisher : Indonesian National Institute of Aeronautics and Space (LAPAN)

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Abstract

Simulation of eruption material flow using probabilistic model based on the Monte Carlo algorithm was conducted in this research. The simulation result was used to support the creation of zoning map of volcanic hazards and the estimation of building number which has possibility to be impacted by the Merapi Volcano eruption. Input data for the simulation was Digital Elevation Model - Shuttle Radar Topographic Mission (DEM-SRTM) with a spatial resolution of 30 meters. In addition, GeoEye satelit imagery in 2009 was used to renew settlement information of the RBI map from BAKOSURTANAL. The simulation result of material flow eruption was overlaid with building area information to estimate the magnitude of eruption impact. The simulation results from this research has similar pattern and similar eruption material distribution with the reference map (volcanic hazard map of Merapi). The flow of Merapi eruption material generally leads to the south through the Gendol Rivers to Cangkringan, and to the southwest ward through the Putih Rivers to Srumbung. Material flow eruption is shown in height simulations 2 meters and 7 meters. The wider and widening of the of simulation models material flow eruption generated, the greater impact on the settlements in the vicinity of Merapi Volcano. Key word: Simulation of eruption material flow, DEM-SRTM, volcanic hazard, Merapi Volcano
PENENTUAN NILAI AMBANG BATAS UNTUK POTENSI RAWAN BANJIR DARI DATA MTSAT DAN QMORPH (STUDI KASUS: BANJIR BENGAWAN SOLO 2007) Parwati, -; Suwarsono, -; Yulianto, Fajar; Suprapto, Totok
Jurnal Penginderaan Jauh dan Pengolahan Data Citra Digital Vol 5, (2008)
Publisher : Indonesian National Institute of Aeronautics and Space (LAPAN)

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Abstract

The relationship between the cloud top temperature from MTSAT-1R and the rainfall from QMorph data in Bengawan Solo water catchment area have been analyzed in this research. The analysis was done using data during 21 – 30 December, 2007 (00 – 23 UTC) for 240 data sets. The result shows that the cloud top temperature which have been potential to be high rain is around 195° – 235° K, whereas the cloud top temperature is greater than 235° K related to the low rainfall. Meanwhile, there was a logarithmic relationship between the rainfall from QMorph data and the cloud top temperature of MTSAT-1R (infrared 1 channal) with the coefficient correlation 0.78. The threshold of the cloud top temperature for the flash flood in Bengawan Solo is lower than 215° K at least lasting for 4 days. The heavy rainfall which occured intensively could be a triggered for the flood disaster around Bengawan Solo water catchment area. Key word: Brigthness temperature of cloud, Rainfall, MTSAT, QMorph, Correlation