基于DMSP/NPP的四川省2000-2020年空间格局变化  

Spatial Pattern Change in Sichuan Province Based on DMSP/NPP from 2000 to 2020

作　　者：孙健兵 杨鑫 周林博 Sun Jianbing;Yang Xin;Zhou Linbo(Chengdu University of Technology Earth Sciences Academy,Chengdu 610051,China)

机构地区：[1]成都理工大学地球科学学院,四川成都610059

出　　处：《科学技术创新》2022年第1期45-48,共4页Scientific and Technological Innovation

摘　　要：基于夜间灯光遥感数据,对四川省时空演化格局进行分析。构建四川省区域2000-2020年长时间序列多源夜间灯光遥感数据集;提取四川省2000年、2005年、2010年、2015年、2020年各城市建成区,计算加权标准差椭圆和Zipf系数进行重心变化和方向性分布变化、规模体系变化等分析。结果表明:(1)四川省的夜间灯光空间格局总体呈现出西南-东北方向的特征,标准差椭圆计算得到的四川省城市群重心相对稳定,2005年相比2000年向重心东南移动,2010年又向西北移动,2015年以及2020年已经相对稳定,始终位于成都市附近。(2)2000-2020年,四川省的q值由0.897降低至0.656,减少了26.86%,城市群Zipf系数呈现持续减小的趋势。2000年以来四川省城市呈现出首位型分布的一些特征且规模分布基本上集中在成都周边,但是Zipf系数一直小于1且持续降低,代表城市群规模分布分散状态逐渐加剧,中小城市发展越来越快,城市群持续均衡发展。Based on DMSP/OLS and 2 NPP/VIIRS nighttime light remote sensing data,this paper analyzed the spatio-temporal evolution pattern of Sichuan Province.Constructing a multi-source night light remote sensing dataset with long time series from 2000 to 2020 in Sichuan Province;The urban built-up areas of Sichuan province in 2000,2005,2010,2015 and 2020 were extracted,and the weighted standard deviation ellipse and Zipf coefficient were calculated to analyze the changes of gravity center,directional distribution and scale system.The results show that:(1)The long axis of the standard deviation ellipse is southwest to northeast,indicating that the spatial pattern of night light in Sichuan province presents a southwest to northeast direction in general.The center of gravity of the sichuan urban agglomeration calculated by the standard deviation ellipse is relatively stable.Compared with 2000,the center of gravity moved southeast in 2005,and moved northwest in 2010.It has been relatively stable in 2015 and 2020,and has always been located near Chengdu.(2)From 2000 to 2020,q value of Sichuan province decreased from 0.897 to 0.656,decreasing by 26.86%,and Zipf coefficient of urban agglomeration showed a trend of continuous decrease.Since 2000,cities in Sichuan province have shown some characteristics of first-place distribution and their size distribution is mainly concentrated around Chengdu,but the Zipf coefficient is always less than 1 and keeps decreasing,indicating that the dispersion of urban agglomeration size distribution is gradually intensified,small and medium-sized cities are developing faster and faster,and urban agglomeration is developing in a sustainable and balanced way.

关 键 词：夜间灯光 城市规模 位序-规模法则 时空格局演变 

分 类 号：P237[天文地球—摄影测量与遥感]