2010—2020年秦岭北麓NDVI时空变化分析——以西安市为例

Analysis of NDVI Spatiotemporal Changes in the Northern Foothills of Qinling Mountains from 2010 to 2020——Taking Xi'an City as an Example

以MODIS卫星的MOD13A2数据产品为基础,本文利用最大值合成法和差值法,从像元尺度对西安市2010—2020年归一化植被指数(NDVI)时空变化进行分析。结果表明,2010—2020年,西安市NDVI明显升高,城市中心和秦岭山脉的植被覆盖变化呈不同趋势;植被覆盖区域改善面积为3 047.15 km~2,其中轻度改善区域占97.99%,退化区域面积为1 810.21 km~2,其中轻度退化区域占83.31%。本研究可为秦岭北麓生态文明建设和可持续发展提供科学参考。

Based on the MODIS satellite's MOD13A2 data product,this paper analyzes the spatiotemporal changes of the normalized difference vegetation index(NDVI) in Xi'an City from 2010 to 2020 at the pixel scale by using the maximum value composites method and the difference method.The results indicate that from 2010 to 2020,the NDVI of Xi'an City significantly increased,and the vegetation cover changes in the city center and Qinling Mountains showed different trends;the improved area of vegetation coverage was 3 047.15 km~2,with mild improvement areas accounting for 97.99%,and the area of degraded areas was 1 810.21 km~2,with mild degraded areas accounting for 83.31%.This study can provide scientific reference for the construction of ecological civilization and sustainable development in the northern foothills of Qinling Mountains.