长江三角洲地区城市群建成区扩张动态、机制与效应研究

项目名称： 长江三角洲地区城市群建成区扩张动态、机制与效应研究

项目编号： No.40801062

项目类型： 青年科学基金项目

立项/批准年度： 2009

项目学科： 金属学与金属工艺

项目作者： 徐梦洁

作者单位： 南京农业大学

项目金额： 17万元

中文摘要： 1998-2008年间，长三角所有城市的建成区都表现出面状发展模式，线状模式则主要依托交通干线网络发展；点状模式在非核心城市如扬州、泰州、南通和台州表现得较为显著。各城市的腹地范围与行政区划界线吻合性较好。上海市在长江三角洲城市群中的核心地位不断凸显，杭州市作为中心城市之一的重要性则相对削弱，城市群空间分布逐渐向均衡化发展，区域内城市群之间关联度高。以南京市为例，对研究期间建成区扩张动态加以分析，研究表明其驱动力主要包括经济发展、人口增加、产业结构调整和道路交通系统完善等，城市扩张是这些驱动力共同作用的结果。以常州市为例，分析市区景观格局梯度变化，城市-郊区-农村景观之间的分异通过景观指数的计算得以清晰显现，建设用地PLAND分布图揭示了城市土地利用空间结构的圈层特性，圈层形状不规则或不完整实质上反映了现实中城市发展受到的诸多限制。不仅城市形态外观存在梯度，调查表明人文意识形态也存在梯度变化，而意识形态的变化也可反映出城市扩张的效应。城市建成区扩张合理性研究包括耕地总量动态平衡评价模型、城市规模合理性评价模型和城市建成区扩张动态评价模型，但模型之间的协调则需进一步研究。

中文关键词： 长江三角洲；建成区；扩张；梯度；评价

英文摘要： During the study period from 1998 to 2008, the build up area of the cities in the Yangtze Delta all expanded plenary, while for the cities located along the main railways and highways the build up area expanded linearly in addition to the plenary model. Point model for expansion was quite common but more significant in those non-core cities such as Yangzhou, Taizhou, Nantongand and Taizhou. Hinterland boundaries for all the cities through calculation coincided well with the administrative boundaries. The importance of Shanghai as the core city of the Yangtze Delta agglomeration in the study period continued to be highlighted while the importance of Hangzhou, another central city of the study region weakened insteadly. The spatial distribution of urban agglomeration gradually became more balanced and the inter connection between these cities increased due to the improvement of transportation network. Nanjing was taken as a case study area for the build up area expansion dynamics. Our study showed that the driving factors for build up area expansion included economic development, population increase, sector structure adjustment and transportation system improvement as well. The expansion of the build up area was the comprehensive impact of all the driving factors although the contributions of the factors were not equal. Changzhou was taken as a case study area for gradient analysis for landscape pattern. The gradient of urban area, suburban area and rural area manifested clearly through the calculation results of landscape indicators. The PLAND indicator of construction land disclose the spherical characteristics of urban land use structure, with the irregular and incomplete of the spheres meaning that the urban sprawl was influenced by many limitations in reality. Gradient not only existed in the physical appearance and land use structure of the city, but also in the human cognition in culture, environment and economy, which also could perceived as the impacts of urban expansion. Urban built-up area expansion of rationality model system included the dynamic balance of farmland evaluation model, reasonability assessment model of urban scale and the dynamic evaluation model of urban built-up area expansion. But the coordination between the three models requires further detailed study.

英文关键词： the Yangtze Delta;build up area;expansion;gradient;assessment