Identifikasi Pola Aliran Air Tanah di Lapangan Panas Bumi Non-Vulkanik Desa Nyelanding Kabupaten Bangka Selatan Berdasarkan Anomali Self-Potential
Abstract
As one of unique non-volcanic geothermal field in Indonesia, mapping the groundwater flow in Nyelanding Village, South Bangka is essential as preliminary study for further exploration activity if the geothermal manifestation. In order to achieve this goal, we conduct a research using natural electrical properties of subsurface, Self-Potentials (SP) method. In this study, fixed-based technique was used where the spacing between measurement stations is the multiplication of 10 m along three lines at the study area. Raw field data (potential value) was corrected to diurnal and closure corrections. Further, SP anomaly was plotted and combined with topography data to be analyzed. The result shows potential value raging from -25mV to 100mV which in agreement with the lowest and highest elevation in topography map, respectively. This means, these values are controlled by topographic feature in the study area. Thus, in conclusion, the groundwater flows from the West to North East and South East part of the study area
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References
Febriani, R. Islami, N. Muhammad, J., (2020). “Preliminary Investigation of Geothermal Potential in Pawam Site, Rokan Hulu, Indonesia”. Presented at the Journal of Physics: Conference Series 1665 (012126). Pekanbaru: Institute of Research and Community Development (LPPM) Universitas Riau.
Revil, A., Qi, Y., Ghorbani, A., Coperey, A., Ahmed, S. A., Finizola, A., Ricci, T. (2019) “Induced Polarization of Volcanic Rocks. 3. Imaging Clay cap Properties in Geothermal Fields”, Geophysical Journal International, 218(2), 1398-1427. https://doi.org/ 10.1093/gji/ggz207
Wilmarth, M., Haizlip, J., Prina, N., Vivian-Neal, P. (2018). Bwengwa River, Zambia-Exploration of a Non-Volvanic African Geothermal System. Proceedings, 43rd Workshop on Geothermal Reservoir Engineering (SGP-TR-213). California: Stanford University.
Vivian-Neal, P., Wilmarth, M.,Haizlip, J., Harrison, P., Sikokwa, S. (2018). Zambia: Exploration of the Non-Volvanic, Fault Hosted Bwengwa River Geothermal Resource Area. Proceedings, 7th African Rift Geothermal Conference. Kigali: Rwanda.
Idral, A. (2010). Structural Traps of a Non Volcanic Hosted Geothermal Field Based on Geophysical Data of Waesalit Area Buru Island-Indonesia. Proceedings World Geothermal Congress 2010 (1-8). Bali: Indonesia.
Reynolds, J. M. (2011). An Introduction to Applied and Environmental Geophysics. Wiley.
Corwin, R. F., Hoover, D. B. “The self-potentials method in geothermal exploration”, Geophysics, 44(2), 226-245. 1979. https://doi.org/10.24042/jipfalbiruni.v7i1.2849.
Revil, A., Pezard, P. A., (1998) “Streaming Electrical Potential Anomaly along Faults in Geothermal Areas”, Geophysical Research Letters, 25(16), 3197-3200. https://doi.org/10.1029/98GL02384.
