草业科学2012，Vol.29Issue(7)：1039-1043,5.
基于TM影像的玛多县湿地变化监测方法
Monitoring methods for wetland changes of Maduo County of China based on Landsat TM data
摘要
Abstract
The remote sense is a useful method to extract the information of wetland. To select an optimal method for extracting wetland information in the Tibetan Plateau, this study tested the accuracy of spec- trum, normalized difference water index, modified normalized difference water index and unsupervised classification to extract the wetland information with Landsat TM data in the Maduo County of Qinghai Province. This study showed that the four methods successfully extracted the wetland information at a large scale. The accuracy of MNDWI to extract the wetland information was better than that of other three methods when the wetland distrihuted at above 4 500 m elevation regions and its accuracy was 80%. At low and mid regions, the accuracy of NDWI was higher than that of MNDWI, but the latter was higher than those of spectrum and unsupervised classification. This study suggested that the MNDWI was better to extract the wetland information due to minimizing the negative effects of the clouds and terrain.关键词
湿地/玛多县/Landsat/TM/MNDWI/谱间关系法/NDWI/非监督分类法Key words
wetland/Maduo County/Landsat TM/MNDWI分类
农业科技引用本文复制引用
杨永顺,钞振华,宣勇,张晓明,赵旭东..基于TM影像的玛多县湿地变化监测方法[J].草业科学,2012,29(7):1039-1043,5.基金项目
青海省三江源自然保护区生态保护和建设工作生态监测 （）
