Spatio-temporal variation and propagation direction of coal fire in Jharia Coalfield, India by satellite-based multi-temporal night-time land surface temperature imaging
| Autor: | Durga Charan Panigrahi, Narendra Singh, R. S. Chatterjee, Dheeraj Kumar |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Mining engineering. Metallurgy
Pixel business.industry Coal mining TN1-997 Energy Engineering and Power Technology Jharia Coalfield Satellite-based night-time imaging Geotechnical Engineering and Engineering Geology Coal fire Spatio-temporal variation Advanced Spaceborne Thermal Emission and Reflection Radiometer Geochemistry and Petrology Infrared window Emissivity Satellite business Transect Variation (astronomy) Propagation direction Geology Land surface temperature Remote sensing |
| Zdroj: | International Journal of Mining Science and Technology, Vol 31, Iss 5, Pp 765-778 (2021) |
| ISSN: | 2095-2686 |
| Popis: | In this paper, the spatio-temporal variation and propagation direction of coal fire were studied in the Jharia Coalfield (JCF), India during 2006–2015 through satellite-based night-time land surface temperature (LST) imaging. The LST was retrieved from Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) night-time thermal-infrared data by a robust split-window algorithm based on scene-specific regression coefficients, band-specific hybrid emissivity, and night-time atmospheric transmittance. The LST-profile-based coal fire detection algorithm was formulated through statistical analysis of the LST values along multiple transects across diverse coal fire locations in the JCF in order to compute date-specific threshold temperatures for separating thermally-anomalous and background pixels. This algorithm efficiently separates surface fire, subsurface fire, and thermally-anomalous transitional pixels. During the observation period, it was noticed that the coal fire area increased significantly, which resulted from new coal fire at many places owing to extensive opencast-mining operations. It was observed that the fire propagation occurred primarily along the dip direction of the coal seams. At places, lateral-propagation of limited spatial extent was also observed along the strike direction possibly due to spatial continuity of the coal seams along strike. Moreover, the opencast-mining activities carried out during 2009–2015 and the structurally weak planes facilitated the fire propagation. |
| Databáze: | OpenAIRE |
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