Remote Sensing Analysis of Environmental Changes in Mega Cities along the Maritime Silk Road
FENG Suyun;ZHANG Kaixuan;LU Linlin;School of Geomatics, Liaoning Technical University;Key Laboratory of Digital Earth Science, Institute of Remote Sensing and Digital Earth , Chinese Academy of Sciences;
With the rapid process of urbanization, it is very important for sustainable urban development that how to evaluate the changes of urban environmental quality in time and accurately, and thus make reasonable urban developmental plans. In this paper, the fine particulate matter(PM_(2.5)) concentration data, land surface temperature(LST) data, normalized difference vegetation index(NDVI) data and supplementary information data of urban land use obtained by satellite remote sensing were obtained and synthetically used to assess the urban environment changes in mega cities along the Maritime Silk Road. The dynamic changes of urban environmental quality of 12 mega cities along the Maritime Silk Road were analyzed based on the comprehensive evaluation index(CEI) from 2000 to 2013. The results showed that, from 2000 to 2013,approximately 75 percent of the mega cities along the Maritime Silk Road showed different degrees of environmental deterioration. The area of environmental deterioration and moderately environmental deterioration accounted for 31.33 percent(4732.39 km~2) of the total urban areas in the 12 mega cities. And 29.48 percent(3765.83 km~2) of the total expanded urban areas from 2000 to 2013 exhibited environmental degradation or moderately environmental degradation. The rise of average land surface temperature, the sharp decrease of vegetation coverage and the increase of the fine particulate matter concentration all had an impact on the urban environmental quality changes of the mega cities along the Maritime Silk Road. Among them, the significant increase of the fine particulate matter(PM_(2.5)) concentration in the air was one of the main manifestations for the environmental degradation of the expanded urban areas from 2000 to 2013 in mega cities along the Maritime Silk Road. These findings suggested that more attentions should be paid to urban environment issues to ensure sustainable urban development along the Maritime Silk Road.
【Fund】： 国家自然科学基金项目(41471369);; 中国科学院先导专项项目(XDA19030502);中国科学院国际合作局对外合作重点项目(131C11KYSB20160061)~~
【CateGory Index】： P237
【CateGory Index】： P237