Preliminary Determination of Geothermal Potential Area Using Remote Sensing; Case Study in Rajabasa Volcano Complex, South Lampung District, Lampung Province
| Main Authors: | Yonash Philetas Immanuel, Alfa Darojatin Rangga Wicaksana, Muhammad Dyan Abdi Satria |
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| Format: | Proceeding Journal |
| Terbitan: |
, 2019
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/3228389 |
Daftar Isi:
- National energy needs are still dependent on fossil fuels, but are inversely proportional to the depletion of reserves. Therefore, economical and environmentally friendly renewable energy is needed to meet these needs, one of which is geothermal energy. Geothermal energy is heat energy stored in rocks below surface with a fluid content inside. One of geothermal potential areas that needs to be developed is in Rajabasa Volcano Complex. This is evidenced by presence of geothermal manifestations on surface in form of fumaroles, hot springs, and hot mud pools. These manifestations are controlled by Sumatran Fault System which is indicated as a pathway for fluid migration. The research method used is a remote sensing technique using Landsat 8 OLI. Results from remote sensing can be used as a guide for further exploration. This method is considered efficient because it can describe the manifestations of geothermal surfaces without direct field observation. This research aims to identify the Normalized Difference Vegetation Index (NDVI), Land Surface Temperature (LST), map the geological structure, and predict the geothermal potential area. LST analysis shows the highest value mostly in the south of the research area with a value of 31.759°C. It has good correlation with the NDVI results, which the lowest value is in the south of research location with value of 0.216. Interpretation of geological structures as identification of lineament to determine direction of heat sources associated with process of hydrothermal change. It can be concluded that the very high potential area of geothermal in the Rajabasa Volcano Complex is at coordinate x: 571076-573623 and y: 9358642-935532 with an area of 684.936 hectares is correlated with presence of hotspring, fumarole, and warm ground manifestations in the research area. Thus, it can be one of references in follow-up to the development of geothermal exploration.