嘉峪关市植被覆盖度时空变化分析

Analysis on spatiotemporal change of fractional vegetation cover in Jiayuguan City

文中以嘉峪关市为研究区域,基于Landsat8遥感影像,利用ENVI5.3软件,对该区域2013年、2015年和2017年三期的植被覆盖度和其变化特征进行了分析,研究结果表明:该区域植被覆盖度总体上呈东部地区高于西部地区,主要以极低覆盖度和高覆盖度为主,高覆盖度区域主要分布在嘉峪关市的东北和东南地区;2013~2017年近5年间,嘉峪关市植被覆盖度总体上略有下降趋势,但这种变化趋势不明显。

Taking Jiayuguan City as the research area,based on Landsat8 remote sensing images,and using ENVI5.3 software,the fractional vegetation cover and the variation characteristics were analyzed in the study area in 2013,2015 and 2017.Research results showed that the fractional vegetation cover was generally higher in the eastern region than in the western region in this area,and it was mainly composed of the low extremely coverage vegetation and the high coverage vegetation.High coverage vegetation was mainly distributed in the northeast and southeast regions in Jiayuguan City.In the past five years from 2013 to 2017,the fractional vegetation cover had the slight downward trend in general,but the change trend was not obvious in Jiayuguan City.