MODIS水体指数模型(CIWI)研究及其应用  

Research on the CIWI Model and Its Application

作　　者：莫伟华[1] 孙涵[1] 钟仕全[1] 黄永璘 何立[1] 

机构地区：[1]国家卫星气象中心遥感应用试验基地

出　　处：《遥感信息》2007年第5期16-21,共6页Remote Sensing Information

基　　金：广西科学基金项目资助(0640053);广西气象科技重点科研项目资助(QK200602)

摘　　要：本文通过分析MODIS与水体识别相关的1～7波段地物光谱图像特征及相关水体指数模型的识别效果，提出了新的水体指数模型（CIWI）。该模型采用植被指数与近红外波段7的进一步组合，有效地解决了水体与云、植被、城镇等其他信息的分离问题，特别是明显地增强了水体与城镇的分离度，实现了水体信息的有效提取。通过应用2004-2005年的MODIS资料对广西贵港市平龙水库进行水体信息遥感监测表明，CIWI水体指数模型优于其他水体指数模型。A new water body index model CIWI （Combined Index of NDVI and MIR for Water Body Identification） is put forward in this paper, which based on the analyses of the spectral characteristics of surface objects in MODIS 1 to 7 wave bands, what related to water body identification. The effects of other water body index models are also compared. The new index model, combined of vegetation index and near infrared MODIS band 7, effectively solves the separation of water body from cloud, vegetation, town and other spectral information. Especially, it performs well in separating water body from town, so the water body information is perfectly picked up. Based on the MODIS data from 2004 to 2005, the monitoring of water body informa- tion of the Pinglong reservoir in Guigang city, Guangxi province are carried out. Satisfied results have been achieved and CIWI model shows better behavior than other water body index models.

关 键 词：水体指数 卫星遥感 MODIS 洪涝监测 

分 类 号：TP751[自动化与计算机技术—检测技术与自动化装置]