摘要
2003年9月,渭河流域发生了严重的洪涝灾害,洪水泥沙含量高达486kg/m 3.准确地对泥沙含量极高的洪水及其淹没区进行快速识别是利用MODIS遥感资料成功进行渭河洪涝灾害监测的关键.通过对洪水及其淹没区MODIS图像的剖面光谱分析认为,在MODIS的1~7通道中,进行洪水识别的最佳通道依此是2、5和6通道;植被指数法和假彩色合成是提取高泥沙含量洪水及其淹没区域的有效方法.
The Weihe river flood with high bedload content at 486kg/m3 occurred in September 2003. It is the key to identify the flood area with high bedload content in monitoring using MODIS data. By analyzing the spectra profiles of MODIS images, the following results are obtained: The optimal channels to monitor floods ordinal are channel 2,5 and 6; The methods of vegetation index and false color composition are effective to pick up the area of a flood with high bedload content.
出处
《灾害学》
CSCD
2005年第3期29-35,共7页
Journal of Catastrophology
基金
陕西省气象局科研开发项目(2004-04):EOS/MOPIS卫星遥感资料应用开发