高速公路路域植被恢复动态研究——以福诏高速福州至仙游路段为例

Study on Vegetation Restoration Dynamics on Sides of Expressway——A Case Study of Fuzhao Expressway from Fuzhou to Xianyou

选用2010年、2013年和2016年3个时相的Landsat系列卫星影像为主要数据源,以福诏高速福州至仙游路段为例,采用植被归一化指数(NDVI)对该路段建设前后(2010—2016年) 6年间的植被恢复动态变化进行评价。结果表明:2010—2016年的年均植被NDVI波动于0. 21～0. 42之间,2010年、2016年的最大值分别为0. 42和0. 21; 2010—2013年,由于福诏高速的建设,该路域的植被退化面积达到66. 95%,生态等级为优良的比例从58. 96%下降到20. 35%; 2013—2016年植被仅退化了16. 23%,较2010—2013年期间退化的少,优良等级的比例从20. 35%上升到35. 08%。这与福州市近年来逐渐重视路域生态恢复密切相关。

In this paper,the Landsat series satellite images from 2010,2013 and 2016 are selected as the main data sources.Taking the Fuzhao high-speed section from Fuzhou to Xianyou as an example,the vegetation restoration dynamic change before and after the construction of the road section(2010-2016)is evaluated by using the vegetation normalization index.The results show that the annual vegetation NDVI fluctuates between 0.21 and 0.42 in 2010-2016,the maximum value is 0.42 in 2010,and the minimum value is 0.21 in 2016.In 2010-2013,due to the construction of Fushun Expressway,the vegetation degradation area of the road zone reached 66.95%,and the proportion of good ecological grade decreased from 58.96%to 20.35%.The vegetation degraded only 16.23%in 2013-2016,which is obviously less than that in 2010-2013.The proportion of excellent grade has increased from 20.35%to 35.08,which is closely related to the gradual attention paid to the ecological restoration of road zone in Fuzhou in recent years.