气候变化领域集成服务门户(CCPortal): Detection of geothermal anomalies using Landsat 8 TIRS data in Tulu Moye geothermal prospect, Main Ethiopian Rift

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DOI	10.1016/j.jag.2018.08.027
	Detection of geothermal anomalies using Landsat 8 TIRS data in Tulu Moye geothermal prospect, Main Ethiopian Rift
	Darge Y.M.; Hailu B.T.; Muluneh A.A.; Kidane T.
发表日期	2019
ISSN	15698432
起始页码	16
结束页码	26
卷号	74
英文摘要	Despite the high geothermal potential of the Main Ethiopian Rift (MER), risks associated with the industry and the difficulty of identifying possible targets using ground surveys alone continue to impede the development of geothermal power diligence in Ethiopia. In this paper, we investigate the geothermal potential of the Tulu Moye prospect area in the MER using Landsat 8, which is an important and cost-effective method of detecting geothermal anomalies. Data with a path/row of 168/054 were obtained from the Landsat 8 Operational Land Imager (OLI) and Thermal Infrared (TIR) sensors for October 17, 2014. Based on radiometric calibration, atmospheric correction (with the 6S model) and an NDVI-based threshold method for calculating land surface emissivity, a split-window algorithm was applied to retrieve the land surface temperature (LST) of the study area. Results show LST values ranging from 292.2 to 315.8 K, with the highest values found in barren lands. A comparison of LST between the Moderate Resolution Imaging Spectroradiometer (MODIS) and Landsat 8 shows a maximum difference of 1.47 K. Anomalous areas were also discovered, where LST was about 3-9 K higher than the background area. We identified seven of these as areas of high geothermal activity in the Tulu Moye prospective geothermal area. Auxiliary data and overlay analysis tools eliminated any non-geothermal influences. The research reveals that the distribution of highy prospective geothermal areas is consistent with the development and distribution of faults in the study area. Magmatism is the thermal source and faults provide conduits for the heat to flow from earth's interior to the surface, facilitating the presence of geothermal anomalies. Finally, TIR remote sensing methods prove to be a robust and cost-effective technique for detecting LST anomalies in the geologically active area of MER. Moreover, combining TIR remote sensing with knowledge of the structural geology of the area and geothermal mechanisms is an efficient approach to detecting geothermal areas. © 2018 Elsevier B.V.
英文关键词	Geothermal anomalies; Landsat 8; Main Ethiopian Rift; Thermal infra Red; Tulu Moye
语种	英语
scopus关键词	algorithm; atmospheric correction; calibration; geothermal system; Landsat; MODIS; satellite data; surface temperature; temperature anomaly; East African Rift; Ethiopian Rift
来源期刊	International Journal of Applied Earth Observation and Geoinformation
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/156547
作者单位	Addis Ababa University, School of Earth Sciences, P.O. Box: 1176, Addis Ababa, Ethiopia; Philipps-Universität Marburg, Department of Geography, Deutschhausstraße 12, Marburg, 35032, Germany; School of Agricultural, Earth and Environmental Sciences, UKZN, Westville, Durban, 4001, South Africa
推荐引用方式 GB/T 7714	Darge Y.M.,Hailu B.T.,Muluneh A.A.,et al. Detection of geothermal anomalies using Landsat 8 TIRS data in Tulu Moye geothermal prospect, Main Ethiopian Rift[J],2019,74.
APA	Darge Y.M.,Hailu B.T.,Muluneh A.A.,&Kidane T..(2019).Detection of geothermal anomalies using Landsat 8 TIRS data in Tulu Moye geothermal prospect, Main Ethiopian Rift.International Journal of Applied Earth Observation and Geoinformation,74.
MLA	Darge Y.M.,et al."Detection of geothermal anomalies using Landsat 8 TIRS data in Tulu Moye geothermal prospect, Main Ethiopian Rift".International Journal of Applied Earth Observation and Geoinformation 74(2019).