基于归一化植被指数变化分级的千山植被变化

基于鞍山市千山1993年和2001年的TM遥感数据及研究区的DEM资料,利用归一化植被指数(NDVI)变化分级方法,对鞍山市千山植被覆盖变化及与之相关的自然和社会因子之间的响应关系进行了分析,结果表明:1993—2001年间,千山范围内地表植被没有产生整体性变化,低海拔区域(高程≤200m)因人工绿化的加强,植被覆盖明显趋好,高海拔区域则由于环境的限制和缺乏保护措施,部分地区出现了植被覆盖退化。今后千山植被保护和生态建设的重点主要包括强化植被保护和恢复工作、加大人工建筑附近的植被绿化和强化高海拔区的生态建设。

NDVI Variation Classification-Based Vegetation Variation of Mountain Qian

The paper analyzes responding relationship between the variation of vegetation cover and the related natural and social factors of Mountain Qian area in Anshan City based on the TM images of 1993 and 2001 and the DEM datas of researched areas,by using the method of NDVI variation classification. The outcomes show that in the period of 1993—2001,the vegetation on surface has no overall change within the mountain area,the vegetation cover is increasing obviously in low altitude region(≤200 m) because of strengthened artificial afforestation. In high altitude region,parts of vegetation cover have degraded because of the restriction of growing conditions and insufficient artificial protective measures. In the future,the vegetation protection and ecological building of the mountain mainly include strengthening vegetation protection and rehabilitation,enlarging afforestation around artificial buildings,strengthening ecological building in high altitude area.