| 环境减灾卫星在甘肃省草原火灾监测中的应用研究 |
| |
| 引用本文： | 蒋友严,黄进,李民轩.环境减灾卫星在甘肃省草原火灾监测中的应用研究[J].甘肃气象,2013(3):590-594. |
| |
| 作者姓名： | 蒋友严 黄进 李民轩 |
| |
| 作者单位： | [1]中国气象局兰州干旱气象研究所,甘肃省干旱气候变化与减灾重点实验室,中国气象局干旱气候变化与减灾重点开放实验室,甘肃兰州730020 [2]西北区域气候中心,甘肃兰州730020 [3]甘肃省气象局减灾处,甘肃兰州730020 |
| |
| 基金项目： | 科技部农业科技成果转化资金项目（2011GB24160005）资助 |
| |
| 摘 要： | 通过分析环境减灾卫星（HJ）的光谱特征，参考MODIS火情监测模型，发展了基于HJ卫星的火情遥感监测方法。针对甘肃省2011年2月10日发生在玛曲、2012年12月8日发生在岷县境内的2次草原火灾，研究了HJ卫星相应通道的本地化阈值，采用植被指数的多时相阈值法提取过火范围并计算了过火面积，同时与甘肃草原监理站的过火面积观测资料及同期MODIS的监测结果分别进行比对。结果表明，2次判定火点的阈值为T4〉310K；HJ卫星监测到的玛曲、岷县的火灾面积分别为65．3hm2、19．8hm2，监测精度为98％和90％，较MODiS监测精度提高了10．5％和2g．9％；Hj卫星进行火情遥感监测的空间分辨率更高，监测结果更精细，具有很好的业务化应用价值。
|
| 关 键 词： | 环境减灾卫星 火灾 T4阈值 |
Application of HJ Satellite in Monitoring Grassland Fire in Gansu Province |
| |
| JIANG Youyan,HUANG Jin,LI Minxuan.Application of HJ Satellite in Monitoring Grassland Fire in Gansu Province[J].Gansu Meteorology,2013(3):590-594. |
| |
| Authors: | JIANG Youyan HUANG Jin LI Minxuan |
| |
| Institution: | 1. Institute of Arid Meteorology, CMA, Key Laboratory of Arid Climatic Change and Reducing Disaster of Gansu Province, Key Open Laboratory of Arid Climatic Change and Disaster Reduction of CMA, Lanzhou 730020, China ; 2. Northwest Regional Climate Center, Lanzhou 730020, China; 3. Meteorological Disaster Reduction Department of Gansu Province, Lanzhou 730020, China) |
| |
| Abstract: | The fire remote - sensing method based on HJ was developed by analyzing the spectral characteristics of HJ and referring to the fire monitoring model of MODIS. TI,, localized threshold of the corresponding channels of HJ was studied according to grassland fires occurred in Maqu on February 10, 2011 and Minxian county on December 8, 2012. The study extracted the range of fire and cal- culated the burned area through multi - temporal threshold method of the vegetation index. At the same time, the results were compared with the burned area observations of the Grassland Management Station of Gansu and MODIS over the same time. The results show that the threshold of the second point of fire was determined as T4 〉 310 K; the fire area from HJ satellite was 65.3 hm2 in Maqu, 19.8 hm2 in Minxian, and the measurement accuracy was 98% and 90% , respectively, which was improved by 10.5% and 28.9% compared with MODIS. The HJ satellite has much higher spatial resolution, much more refined results and good applicative value. |
| |
| Keywords: | HJ satellite grassland fire threshold of T4 |
| 本文献已被 维普 等数据库收录！ |
|
