抚仙湖禄充风景区植被覆盖变化研究

Study on Vegetation Cover Change of Luchong Scenic Area of Fuxian Lake

利用遥感(remote sensing,RS)/GIS技术,分别提取2000年Landset 7 ETM、2008年Landsat5 TM和2016年Landsat 8 OLI三期影像的植被指数(NDVI值),且进行RGB合成,并利用像元二分模型估算不同时期的植被覆盖度,分析了抚仙湖禄充风景区2000~2016年间的植被覆盖变化情况。结果表明,在2000~2008年间极低(0~15%)、低(15~30%)、中高(50~70%)植被覆盖度所占面积增加,而中(30~50%)、高(70~100%)植被覆盖面积减少;2008~2016年间极低植被覆盖度所占面积增加显著,具体增加了18.991 1%,其他各等级植被覆盖度所占面积都在减少。

This paper uses RS/GIS technology to extract the vegetation index(NDVI)of Landset 7 ETM in 2000,Landsat 5 TM in 2008 and Landsat 8 OLI in 2016 respectively,and use the binary pixel model to analyze the vegetation coverage of luchong scenic area in fuxian lake from 2000 to 2016.The results showed that,the coverage area of very low,low,medium and high vegetation coverage increased from 2000 to 2008,while the coverage area of medium and high vegetation decreased.From 2008 to 2016,the area covered by very low FVC increased significantly,That was an increase of 18.991 1%.while the area covered by other grades of FVC decreased.