2d Inversion and Static Shift of Mt and Tem Data for Imaging the Geothermal Resources of Seulawah Agam Volcano, Indonesia

Marwan, Marwan

doi:10.21660/2019.62.11724

Cited by 24 publications

(19 citation statements)

References 9 publications

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“…Supported by its geological situation, Indonesia is one of the potential countries with high potential renewable energy resources such as geothermal [3][4][5][6][7][8][9], hydro [10], biomass [11][12][13], solar [14][15][16], biofuel [17][18][19], and wind [20]. Indonesia has recorded 75,091 MW of geothermal energy, 29,164, 769.69 MW of mini/micro hydro-energy, 2.3 million SBM of biogas energy, 3000 MW of municipal waste, 480 kWh/m 2 /day of solar power, 3-6 m/s of wind power, and 161.5 million SBM of biofuels [21].…”

Section: Introductionmentioning

confidence: 99%

Alternative Briquette Material Made from Palm Stem Biomass Mediated by Glycerol Crude of Biodiesel Byproducts as a Natural Adhesive

et al. 2020

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Recently, the global population has increased sharply, unfortunately, the availability of fossil fuel resources has significantly decreased. This phenomenon has become an attractive issue for many researchers in the world so that various studies in the context of finding renewable energy are developing continuously. Relating to this challenge, this research has been part of scientific work in the context of preparing an energy briquette employing palm oil stems and glycerol crude of biodiesel byproducts as inexpensive and green materials easily found in the Riau province, Indonesia. Technically, the palm oil stems are used for the production of charcoal particles and the glycerol crude as an adhesive compound in the production of energy briquettes. The heating value of palm oil stem is 17,180 kJ/kg, which can be increased to an even higher value through a carbonization process followed by a densification process so that it can be used as a potential matrix to produce energy briquettes. In detail, this study was designed to find out several parameters including the effect of sieve sizes consisting of 60, 80, and 100 mesh, respectively, which are used for the preparation of charcoal particles as the main matrix for the manufacture of the briquettes; the effect of charcoal-adhesive ratios (wt) of 60:40, 70:30, and 80:20; and the effect of varied pressures of 100, 110, and 120 kg/cm2 on the briquette quality. The quality of the obtained briquettes is analyzed through the observation of important properties which involve the heating value and the compressive strength using Response Surface Methodology (RSM). The results showed that the produced briquettes had an optimum heating value of 30,670 kJ/kg, while their loaded charcoal particles resulted from the mesh sieve of 80, in which there was a charcoal loading of 53 g and it pressed at 93.1821 bar, whereas, the compressive strength value of the briquette was 100,608 kg/cm2, which loaded charcoal particles from the mesh sieve of 100, the charcoal-adhesive ratio of 53:47 (wt) and the pressure of 93.1821 bar.

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Section: Introductionmentioning

confidence: 99%

Alternative Briquette Material Made from Palm Stem Biomass Mediated by Glycerol Crude of Biodiesel Byproducts as a Natural Adhesive

et al. 2020

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“…Seulawah Agam [18,19]. The results of geophysical exploration using magnetotelluric [20] and transient electromagnetic [18] have provided information on the depth of the main system of the Seulawah Agam volcano, namely, the caprock zone at a depth of 1 km, the reservoir at 2 km, and the heat source at 3 km below the surface. The VLF-EM and magnetic data [20] also show a near structure of the faults in the depth of 10 m as the main control in Ie Jue manifestation.…”

Section: Seulawah Agam Geothermal Systemmentioning

confidence: 99%

A Low-Cost Uav Based Application for Identify and Mapping a Geothermal Feature in Ie Jue Manifestation, Seulawah Volcano, Indonesia

Marwan¹

2021

GEOMATE

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Mt. Seulawah Agam could make a good location for a geothermal power plant with an estimated energy of 150 Mwe. In geothermal exploration, thermal and multispectral imagery is required for surface temperature calculation, subsurface temperature modeling, and mapping of geothermal potential in volcanoes. In general, temperature data and vegetation index are obtained through such satellite images as Landsat, MODIS, and Sentinel. However, satellite images cannot be used for a small area due to the low resolution (> 15 m/px). In this study, the researchers used a small DJI Phantom 4 Quadcopter equipped with the FLIR One and MAPIR Survey 3 sensors to map the heat signatures of a geothermal feature from the Ie Jue geothermal manifestation, Seulawah Agam, Indonesia. An area of 500 m x 430 m has been scanned, and the images were mosaicked and processed using Drone Deploy Cloud and ArcGIS 10.2. Based on the data processing, NDVI data calculated from the MAPIR sensor are capable of showing vegetation contrast with high resolution (5 cm/px) in several manifestations, which also correspond to Landsat-8 imagery. Meanwhile, the FLIR thermal sensor shows a temperature of 85 °C in the manifestation area, which was confirmed by a geo-thermometer and field outcrops. It was proved that, compared to satellite imagery, UAVs could be applied effectively to support the quantitative assessment of geothermal resources in volcanoes.

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“…In contrast, Occam is an inversion method that utilizes the roughness level of the model. This method is often applied in magneto-telluric data processing [38] and possible to use in gravity data [24]. The data used in the inversion process is a Bouguer anomaly with several considerations; the research location is a large area, the anomaly studied is regional, and the satellite data resolution is also relatively regional, so the Bouguer data does not need to be converted to a residual anomaly.…”

Section: Inversion Of 3d Gravity Datamentioning

confidence: 99%

Continuity of Great Sumatran Fault in the Marine Area Revealed by 3d Inversion of Gravity Data

et al. 2020

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The Great Sumatran Fault (GSF) is a 1900-km-long fault extending from Lampung, Indonesia, to India's Andaman Islands. The fault location is not only on the land but also in the marine area. Previous studies were only focused on the land area of Sumatra and Andaman Islands even though the marine fault has also impacted earthquakes and tsunamis such as in 2004. As an effort to disaster risk mitigation, this study used the gravity method to map and study the continuity of the GSF in the marine area from the Aceh Province, Indonesia, to the Andaman Islands, India. The gravity data were obtained from Topex with a resolution of 1.85 km/px. Based on the Bouguer data, the subduction zone in the western part of the Indian Ocean is observed with the anomaly of 500–700 mGal, while the residual structure of GSF, relative to the subduction zone, only comes to clarity through a horizontal derivative transformation with anomaly 130-250 mGal. To delineate the fault's geometry, the data were inverted by GRABLOX 1.6 using Singular Value Decomposition and Occam methods. The 3D modeling results also clearly show the contrast density between regional faults such as subduction zones on the Westside of the West Andaman Fault (WAF). The GSF faults can also be well demonstrated at 50 km depth. Based on these results, the gravity Topex is potentially used as a preliminary study of the GSF activity in the marine area.

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2d Inversion and Static Shift of Mt and Tem Data for Imaging the Geothermal Resources of Seulawah Agam Volcano, Indonesia

Cited by 24 publications

References 9 publications

Alternative Briquette Material Made from Palm Stem Biomass Mediated by Glycerol Crude of Biodiesel Byproducts as a Natural Adhesive

Alternative Briquette Material Made from Palm Stem Biomass Mediated by Glycerol Crude of Biodiesel Byproducts as a Natural Adhesive

A Low-Cost Uav Based Application for Identify and Mapping a Geothermal Feature in Ie Jue Manifestation, Seulawah Volcano, Indonesia

Continuity of Great Sumatran Fault in the Marine Area Revealed by 3d Inversion of Gravity Data

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