安徽农业大学学报2016，Vol.43Issue(3)：494-498,5.DOI:10.13610/j.cnki.1672-352x.20160512.030
1988-2009年安县山区植被覆盖度变化动态分析
Dynamic analysis of the fractional vegetation coverage in the mountainous area of Anxian from 1988 to 2009
摘要
Abstract
In this paper,five image data were studied for estimating the fractional vegetation coverage in the mountainous area of Anxian using dimidiate pixel model for 1988,1995,2000,2007 and 2009.The fractional vegetation coverage in the mountainous area of Anxian during the 21 years was completely evaluated through analyzing the change of the transfer matrix of the vegetation coverage.The change trends of the vegetation coverage during four periods,1988-1995,1995-2000,2000-2007,and 2007-2009,were analyzed individually.The results showed:1) The mountainous area in Anxian with an improved fractional vegetation coverage during the past 21 years was 34706 hm2,while the degraded part covered an area of 36920 hm2.2) During the periods of 1988-1995,1995-2000,2000-2007,and 2007-2009,the mountainous area in Anxian with an improved fractional vegetation coverage was 39205,51014,54316 and 38813 hm2,respectively,while the degraded part covered an area of 39563,45650,55422,and 44271 hm2,correspondingly.During the period of 2007-2009,the vegetation structure in this region was severely damaged due to the Wenchuan earthquake.With the method used in this paper,we achieved the vegetation coverage inversion,which could protect the mountainous ecological environment and contribute to the sustainable development in the region.关键词
植被覆盖度/归一化植被指数(NDVI)/像元二分模型/转移矩阵Key words
fractional vegetation coverage/normalized difference vegetation index (NDVI)/dimidiate pixel model/transfer matrix分类
信息技术与安全科学引用本文复制引用
张宇欣,杨存建,谭琪铃,张微,倪静..1988-2009年安县山区植被覆盖度变化动态分析[J].安徽农业大学学报,2016,43(3):494-498,5.基金项目
四川省科技厅计划课题“重要生态功能区县生态红线划定技术研究”(2015SZ0198)资助. （2015SZ0198）
