基于遥感和GIS的内蒙古乌达矿区煤火变化监测研究

A Research on Coalfield Fire Monitoring in Wuda Mining Area at Inner Mongolia Based on Remote Sensing and GIS

以1997年TM和2002年ETM+热红外及多光谱遥感影像作为基本信息源,利用多时相热红外影像的煤田火灾识别技术及GIS技术提取煤火信息,通过叠置分析研究了煤田火灾随时间的变化过程。结果显示,1997～2002年期间,内蒙古乌达矿区煤火发生了显著变化,煤火范围逐渐扩大,煤火强度逐渐增强,平均每年增加煤火面积达6210m2。

Coalfield fire information is extracted by use of thermal infrared and multi-spectrum image data of Landsat TM in 1997 and ETM+ in 2002 .The development situation of coalfield fire areas in different periods is analyzed and determined with the help of GIS overlay function. The result indicates that the coalfield fire conditions in Wuda coal mining area at Inner Mongolia have remarkably changed during the past years from 1997 to 2002. The area of coalfield fire has expanded, and its intensity enhanced gradually. The increased area has reached up to 0..16 km 2 per year.