成都市城市外延空间扩展与城市化质量协调研究

Analysis on Coupling Coordination Degree between Urban Extension and Urbanization Quality in Chengdu

基于历年遥感影像提取成都市城镇建设用地范围,分析城镇扩展状况,建立城市扩展综合指数及城市化质量评价指标体系,利用熵值法、协调度模型分析城市空间扩展与城市化质量的协调耦合状况,研究成都市1990—2013年城市空间外延扩展及城市化质量变化趋势,并探索两者协调和耦合状况.研究结果表明:1)成都市城市外延拓展空间有限,扩展强度指数先增后降,拓展形态规则度和紧凑度普遍不高;2)研究期内成都市城市化质量提升明显,并已基本达到合理水平,2000—2009年成都市城市化质量提升最为迅速,2013年末城市化质量已经基本达到合理水平;3)研究期内成都市城市空间扩展与城市化质量协调耦合状况不断优化,从1992年的不协调状态发展为2013年末的高度协调状态.

The purpose of this paper is to study the trend of urban extension and urbanization quality in Chengdu,and the coupling coordination degree between urban land expansion and urbanization quality is also explored.This paper extracts the scope of Chengdu urban construction land from remote-sensing images.Based on entropy evaluation method and coordination degree model,urban expansion comprehensive index and evaluation index system of urbanization quality are established to analysis their coordination degree.Through the above mentioned analysis,the results of this study show the following aspects.1） During the research period,extension of chengdu city spatial expansion intensity index firstly increases and then decreases,expand the form and compact index generally is not high.2） During the study period,the urbanization of chengdu quality improved significantly,between 2000 and 2009,chengdu urbanization quality rapid promotion,at the end of 2013 the urbanization quality has reached a relatively reasonable level.3） During the research period,extension status of chengdu city coordination and coupling condition of urbanization increase year by year,from 1992,uncoordinated state gradually developed to a highly coordination state of 2013.