利用MODIS卫星数据的光伏电站生态环境效应监测与评估

Monitoring and evaluation of environment effect of photovoltaic power station construction using MODIS satellite data

本文选择我国最大的光伏产业园区——青海省共和光伏产业园为研究区,基于MODIS中分辨率卫星遥感数据,结合气象站点实测数据,通过M-K时空趋势分析、格兰杰因果分析等方法,研究2010—2020年地表植被结构参数、植被生产力、反照率、地表温度等各参数的时空变化特征及相互联系,并从时间先后、光伏区域内外的对比中,揭示光伏电站建设的生态环境效应。结果表明:研究区植被整体呈现增加趋势,地表温度与反照率呈下降趋势;光伏板下植被长势略好于光伏板外;建设面积增加是引起研究区植被增加的格兰杰原因,表明光伏的建立可以促进植被生长,降低反照率,冷却地表温度。

This paper selects Gonghe Photovoltaic Industrial Park in Qinghai province,the largest photovoltaic industrial park in China as the study area,uses the MODIS medium resolution satellite data and meteorological data,and investigates the ecological and environmental effects of photovoltaic power station construction from 2010 to 2020.The M-K spatio-temporal trend analysis method was used to analyze the spatial and temporal variations of land surface biophysical parameters after the solar panels were built.Then the Granger causality test method was used to investigate the causal relationship between the changes in land surface parameters and meteorological factors.The results showed that the vegetation in the study area are increasing,while the surface temperature and albedo decreasing.Vegetation growth under photovoltaic panels is slightly better than that outside the panels.The increase of construction area is the Granger cause of the increase of vegetation in the study area.The study indicates that the establishment of photovoltaic can promote the growth of vegetation,reduce albedo and cool the surface temperature.