北京市植被覆盖动态变化与污染气体浓度关系分析研究

Analysis of the Relationship Between Dynamic Changes of Vegetation Cover and Pollution Gas Concentration in Beijing

选用北京市Landsat-5和Landsat-8遥感影像为基础,获取2000、2010、2016年三年的遥感数据,根据最大似然法和最小距离法进行分类,计算归一化植被指数,分析出北京市近几年植被覆盖变化情况。北京市植被从2000年到2010年呈现上升的趋势,到2016年又呈现下降的趋势。再获取某时间点的污染气体浓度,在Arcgis中进行分析处理,得出某时间点气体污染物的浓度示意图,分析表明,大气中污染气体的浓度和植被覆盖率呈现正相关。

Based on the remote sensing images of Beijing Landsat-5 and Landsat-8,the remote sensing data of 2000,2010 and 2016 were obtained,classified according to the maximum likelihood method and the minimum distance method,and the normalized vegetation index was calculated to analyze Beijing.Changes in vegetation cover in recent years in the city.The vegetation in Beijing has shown an upward trend from 2000 to 2010,and it has shown a downward trend in 2016.The concentration of polluted gas at a certain point in time is obtained and analyzed in Arcgis to obtain a concentration diagram of the concentration of gaseous pollutants at a certain time.The analysis shows that the concentration of polluted gases in the atmosphere is positively correlated with the vegetation coverage.