摘要
简述了EOS-MODIS数据用于监测洪涝灾害的优点;采用EOS-MODIS的可见光和近红外波段的比值模式识别水体信息;通过比较位于江汉平原的长湖的2007年遥感估算面积与实际面积,对水体识别精度进行了检验。在此基础上,归纳出EOS-MODIS洪涝灾害监测流程。同时,通过一个实例分析了EOS-MODIS数据用于监测暴雨洪涝的效果。结果表明,EOS-MODIS数据可用于监测水体和暴雨洪涝灾害,且精度较高。最后,指出了EOS-MODIS数据监测洪涝灾害存在的若干问题。
The advantages of EOS-MODIS data for monitoring flood disaster are firstly introduced. The information of water body is identified from MODIS images based on the ratio of NIR （near infrared） to VIS （visible light）. The precision of identifying is verified by comparing the estimating area with the actual area of Chang Lake in Jianghan Plain in 2007. Based on the above analysis, the flow of monitoring is concluded. Then the monitoring effects are analyzed by a practical instance. The result indicates that it is feasible to monitor water body and flood disaster by using EOS-MODIS data, and the monitoring precision is very satisfying. Finally, several existing problems are put forward.
出处
《暴雨灾害》
2008年第1期64-67,共4页
Torrential Rain and Disasters
基金
武汉区域气象中心科技发展基金重点项目(QY-Z-200705)
中国气象局风云气象卫星遥感开发与应用项目(FiDAF-2-01)共同资助
