摘要
在ENVI和GIS技术支持下，利用1989年、1999年、2007年的TM和2013年的ETM’遥感影像数据，运用归一化植被指数（NDVI）方法对龙川江流域植被覆盖度进行估算，并划分为5个不同盖度等级。根据盖度等级的空间分布特征，比较分析了龙川江流域植被覆盖度的变化情况。结果表明：龙川江流域植被覆盖度在1989～2007年呈逐渐增加趋势，2007～2013年又出现退化趋势。对龙川江流域植被覆盖变化的原因进行了分析。
On the base of ENVI and GIS Technology, using TM of 1989, 1999, 2007, and remote sens- ing image data of 2013 ETM ＋ and normalized difference vegetation index （NDVI） method, this article estimates the vegetation coverage of Longchuan river drainage basin. It is also divided into five different degrees, and the change of the vegetation coverage spatial distribution is analyzed. The result shows that the vegetation coverage of Longchuan river basin is gradually increasing from 1989 to 2007, however, it appears the trend of degradation from 2007 to 2013. Therefore, the reasons of vegetation coverage change also have been analyzed.
出处
《林业调查规划》
2013年第5期14-18,44,共6页
Forest Inventory and Planning
基金
国家自然科学基金项目"横断山区典型干旱河谷水文过程对气候变化异常LUCC的响应机理研究"(41101099)
关键词
植被覆盖度
动态监测
归一化植被指数
ENVI
GIS
龙川江流域
vegetation coverage
dynamic monitoring
Normalized Difference Vegetation Index
ENVI
GIS
Longchuan river drainage basin
