Reflectance aureoles associated with thermal anomalies due to subsurface mine fires in the Jharia coalfield, India
Reflectance aureoles associated with thermal anomalies due to subsurface mine fires in the Jharia coalfield, India
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DOI：
10.1080/014311698214415
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发表时间：
1998
影响因子：
3.4
通讯作者：
R. Gupta;A. Prakash
中科院分区：
文献类型：
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作者：
R. Gupta;A. Prakash
图1是一组经过处理的陆地卫星TM图像，显示了由于次表层和相关的反射光环引起的热异常：（a）TM 6子图像，（B）TM 3子图像，和（c）TM 4子图像。这些窗口的双卷积输出分别在图（d）、（e）和（f）中示出。每个带（TM 6、TM 3和TM 4）图像已分别进行密度切片和颜色编码，使得红色代表DN值的最高范围;黄色和绿色代表连续较低的DN值范围，背景DN值为蓝色。煤炭资源在世界各地的煤矿区经常遇到。Jharia煤田是印度最大的煤田，位于加尔各答西北约250公里，德里东南约1150公里（图2）。它包括多个煤层。Bharat Coking Coal Limited（BCCL）艾德了Jharia煤田的约70个主要煤矿（Prasad等人，1984年）。这是图1中最大的集中地之一。经处理的Jharia煤田部分区域的TM图像，显示热异常区域上的反射光环：（a）TM 6子图像，（B）TM 3子图像和（c）TM 4子图像。这些窗口的双重卷积输出分别在（d）、（e）和（f）中示出。每个条带（TM 6、TM 3和TM 4）都分别进行了密度切片和颜色编码，红色表示DN值的最高范围;黄色和绿色表示连续较低的DN值范围，背景（最低DN值）用蓝色编码。
Figure 1 is a set of processed Landsat TM images showing thermal anomalies due to subsurface® res and the associated re ectance aureoles:(a) TM6 subimage,(b) TM3 subimage, and (c) TM4 subimage. The double convolved outputs of these windows are shown in® gures (d),(e) and (f) respectively. Each band (TM6, TM3 and TM4) image has been separately density sliced and colour-coded, such that red represents the highest range of DN-values; yellow and green represent successively lower DN-value ranges and the background DN-values are in blue. Coal® res are frequently encountered in coal mining areas, all over the world. The Jharia coal® eld, the largest coal® eld in India, is located about 250km NW of Calcutta and about 1150 km SE of Delhi (® gure 2). It comprises multiple coal seams. The Bharat Coking Coal Limited (BCCL) identi® ed about 70 major mine® res in the Jharia coal® eld (Prasad et al. 1984). This is one of the largest concentration ofFigure1. Processed TM images of a part of the area in the Jharia coal® eld, showing re ectance aureoles over the thermally anomalous areas:(a) TM6 subimage,(b) TM3 subimage, and (c) TM4 subimage. The doubly convolved outputs of these windows are shown in (d),(e) and (f) respectively. Each band (TM6, TM3 and TM4) has been separately density-sliced and colour-coded, such that red represents the highest range of DN-values; yellow and green represent successively lower DN-value ranges, and the background (lowest DN-values) is coded in blue.