水资源与水工程学报2017，Vol.28Issue(3)：5-9,5.DOI:10.11705/j.issn.1672-643X.2017.03.02
毛乌素沙漠南部植被指数的变化规律研究
Study on the evolution law of the vegetation index in the southern Maowusu Desert
摘要
Abstract
To know the vegetation changes in the southern Maowusu Desert, the vegetation dynamic in above area from 2000 to 2013 was analyzed from the Normalized Difference Vegetation Index (NDVI), based on the Moderate Resolution Imaging Spectroradiometer (MODIS).The results show that the annual averages of NDVI presented a rising tendency with an annual growth rate of 2.69×10-3/year.The changes of the spatial maximums of the annual averages of NDVI were insignificant, with an increasing trend.Using the transfer matrix method, the NDVI values were divided into different levels and the transfer matrix of vegetation index was built.The yearly transfers of the NDVI levels were further analyzed.Comparing the NDVI values and NDVI levels of this year to that of last year, the NDVI shows a trend of getting better generally.The vegetation levels of 72.37% of the pixels became better in 2013 compared with that in 2000.The numbers of NDVI values in different levels in the transfer matrix in 2013 compared with that in 2000 were analyzed and the result suggests that, the NDVI values moved from the lower to the upper triangular of the transfer matrix, and the numbers of pixels in the upper triangular were much larger than that in the lower.This result suggests that the NDVI presents a tendency of a transformation from the lower level to the higher, and the vegetation became better gradually.In the whole, the vegetation of the southern Maowusu Desert was getting better continuously from 2000 to 2013.关键词
植被指数/转移矩阵/空间变化/生态/毛乌素沙漠Key words
vegetation index/transfer matrix/spatial change/ecology/Maowusu Desert分类
农业科技引用本文复制引用
刘登峰,王心睿,黄强,孟宪萌,林木..毛乌素沙漠南部植被指数的变化规律研究[J].水资源与水工程学报,2017,28(3):5-9,5.基金项目
陕西省自然科学基础研究计划项目(2016JQ5105) （2016JQ5105）
国家自然科学基金项目(51309188、51609270) （51309188、51609270）
教育部博士学科点基金(20136118120021) （20136118120021）
