Monitoring of vegetation fractional coverage in Mu Us desert based on remote sensing

详细信息    查看全文 | 下载全文 | 推荐本文 |

• 作者：Min XUSheng ZHENGRong TIANCheng LIUChun -Xiang CAOHao ZHANGHui-Cong JIAWei JIMeng-Xu GAOJian ZHAOXi-Liang NIWei CHEN
• 会议时间：2011-08-01
• 关键词：vegetation coverage ; spectral mixture analysis ; dimidiate pixel model ; NDVI
• 作者单位：Min XU,Cheng LIU,Chun -Xiang CAO,Hao ZHANG,Hui-Cong JIA,Wei JI(State Key Laboratory of Remote Sensing Science,Jointly Sponsored by the Institute of Remote Sensing Applications of Chinese Academy of Sciences and Beijing Normal University,Beijing 100101,P.R.China)Sheng ZHENG,Rong TIAN,Meng-Xu GAO,Jian ZHAO,Xi-Liang NI,Wei CHEN(State Key Laboratory of Remote Sensing Science,Jointly Sponsored by the Institute of Remote Sensing Applications of Chinese Academy of Sciences and Beijing Normal University,Beijing 100101,P.R.China Graduate School of the Chinese Academy of survey.images)
• 母体文献：第五届海峡两岸遥感遥测会议论文集
• 会议名称：第五届海峡两岸遥感遥测会议
• 会议地点：哈尔滨
• 主办单位：中国地理学会
• 语种：chi
• 分类号：S5;F3

摘要

This study combined spectral mixture analysis (SMA)with supervised classification for extracting the VegetationFractional Coverage (VFC)of Uxin country in Mu Us desert,China.Three periods of multi-temporal satellite imageswhich are landsat 5 TM images acquired between 1988-1991,Landsat 7 ETM+images acquired between 1999-2001and HJ-1B CCD images acquired in 2009,were respectively utilized to retrieve the normalized differential vegetationindex (NDVI)of Uxin country in different periods.Simultaneity,a supervised method of classification was employed todivide the image into three classes including vegetation,bare soil and water.Set the mean of ten highest NDVI value ofvegetation class as the pure vegetation NDVI value,and the mean of ten lowest NDVI value of bare soil class as thepure bare soil NDVI value,based on which,the dimidiate pixel model was established to extract VFC in Uxin countryin different periods.The result shows that the VCF of Uxin country had a increasing trend in the past 30 years,andmany desert land converted into vegetation covered land which is own to the construction of the ¨Three North 〃protection forest.