Dynamic monitoring technology of Qinghai alpine grassland fire in spring based on multi-source satellite remote sensing data
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摘要: 多源卫星遥感数据源能为现场扑火指挥决策提供快速、准确的空间信息.根据火点在中红外波段辐射率和亮温急剧增大的特点,利用10个时次的国内外极轨气象卫星资料(包括首次利用了NPP卫星数据),针对2016年3月18—19日发生在青海省果洛藏族自治州久治县的草原火灾进行了实时动态监测,并采用高分数据提取了灾后过火面积.研究结果表明,气象卫星火点判识方法及阈值设定同样适用于青海高寒草地春季的火情监测;快速判识阈值的确定,可为日常火情实时监测业务提供快速、有效的技术支持.Abstract: Multi-source satellite remote sensing data can provide rapid and accurate spatial information on blazes. According to the fire spot characteristics of sharply increasing in mid - infrared emissivity and brightness temperature, the authors analyzed the real-time dynamic monitoring of fire process, which happened in Jiuzhi of Guoluo Tibetan Autonomous Prefecture in Qinghai Province from March 18 to 19 , 2016 . Ten times of polar-orbit meteorological satellite data, especially NPP, were used to perform real-time monitoring, and GaoFen( GF) data were used to extracted the fire area. Finally, the fire distinguishing thresholds of Qinghai alpine grassland in spring were obtained. The results show that the fire -monitoring method could be applied to Qinghai, and that quick recognition threshold setting could meet the fast and effective requirements in daily real-time monitoring.
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Key words:
- fire monitoring /
- alpine grassland /
- satellite remote sensing /
- multi-source data
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