基于光谱分析的平潭综合实验区建设初期裸土变化的遥感监测
Remote sensing monitoring of bare soil in initial stage of construction of Pingtan Comprehensive Experimental Zone based on spectral analysis

为探究平潭综合实验区建设初期的裸土变化情况，基于2009、 2014年两景Landsat影像，采用光谱分析方法对其主岛海坛岛的裸土信息进行提取，并结合研究区的土地覆盖分类结果，分析了平潭综合实验区在建设初期(2009—2014年)裸土的时空变化状况及其原因. 结果表明，海坛岛的裸土面积由设立实验区之前（2009年）的17.44km2增加到实验区建设初期（2014年）的30.05km2，增幅高达72.31%，裸土面积占研究区总面积的百分比亦由2009年的6.56%增加到2014年的10.58%，裸土增加的区域主要集中在研究区的西部及中东部区域.
To explore the change of bare soil at the preliminary stage of Pingtan Comprehensive Experimental Zone construction，the spatial and temporal change of bare soil was analyzed in this paper in spectral analysis method based on 2009 and 2014 Landsat images. At the same time，with the support of land use and land cover information，the driving forces were discussed. The results showed that the area of bare soil has increased sharply from 17.44km2 in 2009 to 30.05km2 in 2014 by 72.31%. The bare soil area accounted for 6.56% of the total island area in 2009 and the percentage grew to 10.58% in 2014. The extension of bare soil located mainly on west and middle-east part