摘要
探讨了利用ETM+数据得到归一化植被指数(NDVI)数据进行植被变化监测的方法,并以京津风沙源治理工程试验点延庆县为例,利用1999、2002、2006年ETM+数据,分析了该区1999年至2006年间植被指数的变化情况.结果表明:7年来,农田植被呈现先快速减少,后期又增加的趋势;高盖度植被面积呈现增加趋势,增加了36353.16hm2;中盖度植被面积呈减少的趋势,减少了38352.9hm2;低盖度植被面积呈现增加趋势,增加了7029.45hm2.1999年至2006年间,延庆县不同植被盖度有增有减,但总的趋势是增加的.
Taking Yanqing County, Beijing, as an example for combating the sandstorms affecting Beijing-Tianjin metropolitan region, this paper made a study of the method for dynamic monitoring of its vegetation restoration by NDVI data obtained from ETM ＋ data. The changes of vegetation index from 1999 to 2006 in the county are analyzed by means of ETM＋data in 1999, 2002 and 2006. The research shows that for 7 years, farm land has increased and then decreased; that high-density vegetation increases to 36 353.16 hm^2, middle-density vegetation decreases to 38 352.9 hm^2, and low-density vegetation increases to 7 029.45 hm^2 and that, from 1999 to 2006, the vegetation of different densities in the county increases or decreases but, in general, it has an increasing tendency.
出处
《中南林业科技大学学报》
CAS
CSCD
北大核心
2008年第4期159-164,共6页
Journal of Central South University of Forestry & Technology
基金
"十一五"国家科技支撑计划项目"国家重点林业工程监测技术研究(2006BAD23B05)"
关键词
延庆县
植被恢复
动态监测
Yanqing County
vegetation restoration
dynamic monitoring
