城市化与都市农业功能交互耦合关系及时空特征分析

Study on the Relationship and Spatial-Temporal Characteristics of Interactive Coupling between Urbanization and Urban Agriculture Function

城市化与都市农业功能通过交互耦合机制形成复杂系统,在区域可持续发展中具有重要作用。该文在建立交互耦合系统评价指标体系基础上,运用灰色关联分析模型、耦合度模型探讨西安都市圈城市化与都市农业功能交互耦合关系并从时空角度分析耦合度的演变规律与空间分异特征。研究结果表明：1）城市化与都市农业功能要素关联度均在0.6之上,耦合关系错综复杂,关系密切。城市经济、消费、交通和科技对都市农业功能影响较大;都市农业食物供给、就业、观光休闲及美化环境功能服务城市化能力最强。2）2000-2011年西安都市圈城市化与都市农业功能耦合度在0.6~0.85之间,时序发展呈现波动性和阶段性特征,总体上,二者在较高水平上趋于协调。3）2011年二者耦合度呈现都市圈西北区域低于东南区域的空间特征,耦合发展水平具有显著的空间差异特征。

The urbanization and urban agriculture function developed a complex system through the interactive coupling mechanism,which plays an important role in the regional sustainable development.Based on the evaluation indexes system,this paper established the correlation model and the coupling model of the interaction between urbanization and urban agriculture function,to study the interactive coupling relationship between urbanization and urban agriculture function in Xi′an metropolitan zone and the characteristics of it′s timing sequence and spatial differentiation.The results showed that：1）The correlation degree of the factors are all above 0.6,meaning the interactive coupling mechanism is complex and their relationship are close.The urban economy,consumption,transportation,science and technology had a big impact on the development of urban agriculture function.Food supplement,employment,sightseeing and leisure,and landscaping of the urban agriculture effectively service the development of the urbanization.2）The coupling degree of urbanization and urban agriculture function in Xi′an metropolitan zone from2000 to 2011is in the range of 0.6~0.85,the sequential development presents the characteristics of volatility and stage,overall,the development of the coupling between urbanization and urban agriculture function is going to coordination at a higher level.3）The spatial characteristics of the coupling degree of urbanization and urban agriculture function in Xi′an metropolitan zone present that the coupling degree of the northwest area is lower than the southeast area,and most of the area is lower.According to the corresponding relationship of the population urbanization and the coupling degree,all the 19 counties of Xi′an metropolitan zone can be divided into five spatial types which are low-level coupling,conflict,amelioration,high-level harmony and recession,the spatial differentiation of the levels of the coupling is outstanding.