植物研究2012，Vol.32Issue(6)：750-755,6.
基于NDVI监测5.12震后岷江河谷映秀汶川段滑坡体植被恢复
Monitoring the Vegetation Recovery at Landslides along the Minjiang River Valley after 5.12 Earthquake using NDVI:a Case Study of the Yingxiu-Wenchuan Section
摘要
Abstract
The Wenchuan Earthquake (Richter scale 8) on May 12, 2008 caused widespread ecosystem damages in the Minjiang River Basin. It is important to evaluate the natural vegetation recovery process and provide basic information on ecological aspects of the recovering environment after the earthquake. To circumvent weather limits of remote sensing and to meet the need for regional observation analyses, three Landsat TM images pre-and post-earthquake in the Minjiang arid valley were used for analysis. The post-earthquake vegetation cover values were compared to the pre-earthquake value to determine the extent to which the vegetation was damaged in relation to the pre-earthquake pattern, and the rate of recovery was evaluated. Spatial characteristics of vegetation loss and natural recovery pattern were analyzed in relation to elevation, slope and aspect. The results showed that (1) the landslides caused by the earthquake was 5 413.95 hm , accounted for 34. 74% of the total area; (2) there is a good correlation between recovery rate and both slope and elevation; ( 3 ) after three years, the average vegetation recovery rate reached 66. 71% . Our study also showed that there was a high congruency between recovery rate and both slope and elevation, and the recovery patterns were complicated.关键词
NDVI/5.12地震/植被动态/岷江Key words
NDVI/5. 12 earthquake/ vegetation dynamic/ Minjiang River分类
农业科技引用本文复制引用
许积层,卢涛,石福孙,唐斌,慕楠..基于NDVI监测5.12震后岷江河谷映秀汶川段滑坡体植被恢复[J].植物研究,2012,32(6):750-755,6.基金项目
中国科学院知识创新工程重要方向性项目(KSCX2-YW-Z-0959和KSCX2-EW-J-22) （KSCX2-YW-Z-0959和KSCX2-EW-J-22）
国家自然科学基金(30900214) （30900214）
