城市空间结构紧凑与土地利用效率耦合分析--以南京市为例

RESEARCH OF COUPLING RELATIONSHIP OF URBAN SPATIAL STRUCTURECOMPACTNESS AND LAND USE EFFICIENCY:A CASE STUDY OF NANJING

城市可持续发展一直是城市地理学和城市规划关注的热点。以南京市为例,测度了城市空间结构紧凑度和城市土地利用效率,并探讨二者的关系。得出以下结论:(1)南京市2002、2007和2012年的城市空间结构均属于较不紧凑状态,且呈下降趋势;"中心区"紧凑度高,且呈上升趋势,城市内部填充与城市外围蔓延扩张现象并存。(2)2002~2012年南京市城市土地利用效率属于中等水平,且呈下降趋势,南京市各区城市土地利用效率差异明显。(3)城市空间结构紧凑通过距离和交通可达性来影响城市内部要素在空间的分布,最终影响城市土地利用效率。基于此,在城市发展过程中应加强城市内部空间合理组织,尤其是加强对交通设施的投入,促进城市要素在空间上的合理分布与流通,提高城市土地利用效率。

Urban sustainable development has been the hotspot of urban geography and urban planning. In this paper we measured the compactness of urban spatial structure and urban land use efficiency and discussed on their relationship.Nanjing was chosen as the study area, and conclusions were as follows： 1） the urban spatial structure of Nanjing was less compact in 2002, 2007 and 2012, the compactness of the whole city declined while that of the inner city increased. The internal filling and peri-urban expansion coexisted; 2） urban land use efficiency was on a moderate level and had a downward trend from 2002 to 2012, differences existed between different districts in Nanjing; 3） through the distance and transportation accessibility, the compactness of urban spatial structure had a significant influence on the distribution of the urban development factors, which finally influenced the urban land use efficiency. This study showed that in the process of urban development, we should optimize the inner spatial structure, especially increase investment in transportation which will help to promote the distribution and circulation of socio-economic factors, and finally improve the efficiency of the urban land use.