基于时序夜间灯光数据的甘肃省城市扩张模式研究  

Exploring Urban Expending Pattern of Gansu Province Using Time Series of Nighttime Light Remote Sensing Data

作　　者：杜炜哲 王睿宁 俞炜杰 刘兴运 张耀锋 年雁云[1] DU Weizhe;WANG ruining;YU Weijie;LIU Xingyun;ZHANG Yaofeng;NIAN Yanyun(College of Resource and Department,Lanzhou University,Lanzhou 730106,China)

机构地区：[1]兰州大学资源环境学院,甘肃兰州730106

出　　处：《遥感技术与应用》2024年第3期659-668,共10页Remote Sensing Technology and Application

基　　金：中国科学院A类战略性先导科技专项(XDA20100102);兰州大学本科生校级创新创业项目(20220290021)资助。

摘　　要：甘肃省在国家战略中具有重要的地位,分析甘肃省城市扩张规律与时空演变特征对于新型城镇化推进、“一带一路”倡议实施等都具有重要意义。以跨传感器校正的类NPP-VIIRS夜光遥感数据为基础,建立了标准差椭圆、核密度分析、数形特征分析、位序-规模法则、相关系数矩阵等方法组成的分析框架,系统评估了10 a以来扩张规律。结果表明:①城市扩张重心从兰州市移动到白银市后又回移,分布方向大体为西北-东南方向,且在该方向上产生了集聚现象;②城市面积增长明显,由兰州、嘉峪关“一主一次”双核格局演变为兰州为中心,嘉峪关、庆阳为两翼的格局;③甘肃省建成区扩张速度逐步放缓,扩张模式按照建成区数形特征分为与地形相关的四个组团;④各地级市(州)服从位序-规模法则分布,分布类型为位次形,省会兰州市的首位度并不显著;⑤夜间灯光总量与重心在东西方向的位移量都与社会经济要素紧密相关,而南北方向的位移量相关性不强。研究成果全面揭示了甘肃省城市扩展规律,对于优化城镇体系和国土开发格局具有较大的参考价值。Gansu Province plays an important role in the national strategies.Analyzing the regular pattern of ur⁃ban expansion and temporal and spatial characteristics of Gansu Province is of great significance for the promo⁃tion of new urbanization and the implementation of Belt and Road strategy.An urban expansion model analysis framework composed of standard deviation ellipse,Kernel density analysis,geometric feature analysis of builtup area,position-scale law and correlation matrix was established,and the law of urban expansion over the past 10 years was systematically evaluated based on NPP-VIIRS-like nighttime light remote sensing data corrected across sensors.First,after moving from Lanzhou City to Baiyin City,the center of gravity of nighttime light moved back again,while the distribution direction was generally northwest-southeast,with obvious agglomera⁃tion phenomenon in this direction.Secondly,the scale of cities in the province has grown significantly.Its spa⁃tial pattern evolved from the dual-core pattern of"one main and one time"in Lanzhou and Jiayuguan to Lanzhou as the center,Jiayuguan and Qingyang as the two wings.What’s more,the expansion rate of built-up areas in the province has gradually slowed down,and the expansion mode is divided into four groups related to geograph⁃ical location according to the geometric characteristics of built-up areas.And then,Prefecture-level cities obey the distribution of the order-scale law,and the distribution type is secondary,which means the primacy index of the provincial capital Lanzhou City is not significant.Finally,Total amount of lights at night and the displace⁃ment of the center of gravity in the east-west direction are closely related to socio-economic factors,while the displacement in the north-south direction is not strongly correlated.Research results comprehensively reveal the law of urban expansion in Gansu Province,which has great reference value for optimizing the urban system and optimizing the pattern of land development.

关 键 词：甘肃省 城市化 夜间灯光数据 时空演变 城市扩张 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]