区域城市化与生态环境耦合特征及机制--以江苏省为例

根据城市化与生态环境耦合涵义及规律,在灰色关联技术的支持下,构建了耦合系统评价指标体系和评价模型。通过对江苏省的实证分析揭示出该省城市化与生态环境交互作用的主要因素,并探讨它们耦合作用的时空特征。研究表明:①江苏省城市化与生态环境的耦合总体上表现在城市化对生态环境的胁迫作用和生态环境对城市化的约束作用两个方面,由此遴选出作用于生态环境的8项主要的城市化指标和影响城市化的9项主要的生态环境指标,它们较为全面反映出系统交互作用的机制;②计算显示1990—2003年间江苏省耦合强度的变化呈现出先大后小,再变大的“U”型形状,依据其变化特点将其划分为两个阶段;③江苏省区域城市化与生态环境耦合度分布基本符合南北空间分异的规律,依据其耦合特性,将全省13个行政市划分为4种耦合类型。

ON CHARACTERISTICS AND MECHANISM OF REGIONAL URBANIZATION AND ECO - ENVIRONMENT COUPLING--TAKING JIANGSU PROVINCE AS A CASE

According to the rule of urbanization and eco-environment coupling,the index system and the associative degree model that includes the associative degree model and the coupling degree model,have been built by grey associative technique.Based on Jiangsu's panel and serial statistical data,the main factors of urbanization and eco-environment coupling,temporal-spatial distributions of the coupling degrees have been researched.The results show that: firstly,it can be summed up the coupling characteristics that eco-environment is intimidated by urbanization and urbanization restricted by eco-environment.Through grey associative degree analysis,the paper selects 8 items of urbanization and 9 items of eco-environment to reveal the mechanism of urbanization and eco-environment coupling.Secondly,there exist significant phase and undulatory characteristics for the temporal evolvement of coupling degrees,in which the changing of coupling degrees stages takes on inverse "U" shape.Thirdly,the distribution of the coupling degrees basically conforms to the discrepant rule that it is higher in the northern and southern belt,and lower in the middle.According to the coupling degree distributions and the stages of regional urbanization and economic development,the 13 districts can be classified as four coupling types.