基于地理探测器的区级城市扩张驱动因子研究——以昆明市呈贡区为例
A Study on the Driving Factors of Urban Expansion at the District Level Based on Geodetector:A Case Study of Chenggong District,Kunming City
易俊华 1葛俊洁 1张伟红 1张晓伦 1许泉立2
作者信息
- 1. 昆明冶金高等专科学校测绘学院,云南 昆明 650033
- 2. 云南师范大学地理学部,云南 昆明 650500
- 折叠
摘要
探索城市扩张的驱动因子及其相互作用机制对于城市合理规划具有重要作用.现有研究多数从大范围的宏观视角刻画城市扩张特征及其驱动机制,难以满足城市扩张过程的精细化表达需求.为此,提出了一种基于区级小范围城市扩张驱动因子及其机制的探测方法以解决上述问题.首先,利用多阶邻接度指数(Multi-order Adjacency Index,MAI)精细刻画城市景观扩张特征;然后,利用地理探测器(Geodetector)建立MAI与驱动因子的空间异质性关联模型;最后,利用上述模型探测城市景观扩张的驱动因子及其交互作用机制.以昆明市呈贡区为例,试验结果表明:1)呈贡区城市化发展具有显著的时空异质性,在城市扩张的高速和放缓时期都表现出,以道路建设为主地形坡度为辅的主要驱动机制.2)在小范围城市扩张中,多种驱动因子交互作用影响较为明显.研究为小范围城市扩张过程的精细化刻画及其驱动机制探索提供了借鉴.
Abstract
Exploring the driving factors and their interaction mechanisms of urban expansion plays an im-portant role in the rational planning of cities.Most existing studies depict the characteristics and driving mechanisms of urban expansion from a macro perspective of large scales,which is difficult to meet the need for a fine representation of the urban expansion process.Therefore,this article proposed a detection method based on small-scale districts to explore the driving factors and mechanisms of urban expansion,aiming to address the aforementioned issues.Firstly,the characteristics of urban landscape expansion were characterized using the Multi-order Adjacency Index(MAI).Secondly,a spatial heterogeneity as-sociation model between MAI and driving factors was established using the Geodetector.Finally,the driving factors and their interaction mechanisms of urban landscape expansion were detected using the a-bove model.Taking Chenggong district of Kunming city as an example,the results show that:1)The urbanization development of Chenggong district has significant spatial and temporal heterogeneity,demon-strating the main driving mechanism of road construction supplemented by terrain slope during both high-speed and slow-down periods of urban expansion.2)In small-scale urban expansion,the interaction of multiple driving factors is more obvious.This study provides a reference for the fine description of the process of small-scale urban expansion and the exploration of its driving mechanism.
关键词
地理探测器/区级城市扩张/空间尺度/多阶邻接度指数/驱动因子Key words
geodetector/urban expansion at district level/spatial scale/multi-order adjacency index/driving factors引用本文复制引用
基金项目
云南省教育厅科学研究基金(2023J1524)
教育部重点课题(ZH2021030101)
出版年
2024
NETL
NSTL
万方数据