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基于夜间灯光遥感影像等多源数据,提出了一种区域城市化及其生态效应遥感监测方法。该方法采用夜间灯光遥感数据提取成渝经济区城市范围,并分析城市空间演变过程,同时以植被净初级生产力(NPP)为生态系统功能评价指标,分析了快速城市化对区域生态系统功能的影响。研究结果表明:(1)成渝经济区城市面积由1994年的2 074km2增长到2015年的4 391 km2,年均增长率为3.64%,且城市用地规模增长速度略快于城市人口增长速度;(2)城市内的NPP均值远低于非城市区域,且近年来二者间的差异逐渐增大,成渝经济区快速城市化在一定程度上减少了植被NPP,特别是对城市内部的植被NPP影响较大;(3)快速城市化中土地利用结构的改变是导致成渝经济区城市内植被NPP大量减少的重要因素。
Abstract：In this paper, we proposed a remote sensing monitoring method to estimate regional urbanization and its impact on ecosystem based on nighttime light images and other multi-source data. In this method, we extracted urban areas from nighttime light images in Chengyu Economic Zone, and estimated the extent of urban development and its impact on net primary productivity(NPP) which was recognized as an indicator of ecosystem function. The results show that(1) the total urban area has grown from 2 074 km2 in 1994 to 4 391 km2 in 2015 with an average annual growth rate of 3.64%, and growth rate little faster than the growth of urban population.(2) The average NPP of each year in city is smaller than that of non-urban and the difference increased in recent years, which indicates that the fast urbanization influenced the total NPP of Chengyu Economic Zone at a certain extent and has a great impact on the urban NPP.(3) The changes of urban land use structure lead to urban NPP reduced.
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基本信息:
中图分类号:P237;X87
引用信息:
[1]张荞,陈慧,王萍,等.基于多源遥感影像的城市化及其生态效应研究[J].地理空间信息,2018,16(07):58-62+10.
基金信息:
四川省科技计划资助项目(2017SZ0027、2017SZ0081);; 国家基础测绘科技计划资助项目(2017KJ0302)
2018-07-16
2018-07-16
2018-07-16