长三角地区城市土地利用集约度区域分异研究

Regional Disparities of Urban Land Intensive Utilization Degree in The Yangtze Delta

土地短缺逐渐成为制约长三角地区经济迅速发展的关键要素。集约利用土地,不断提高城市土地利用效率,是解决长三角地区土地资源稀缺,缓解人地关系矛盾的必然选择。从土地利用强度、产出效率、生态效益、可持续利用程度四方面阐释城市土地利用集约度内涵,以此构建适合长三角地区城市土地利用集约度评价的指标体系,同时运用GIS空间分析方法与技术对评价结果进行空间分异研究,并分析差异产生原因。结果表明:①长三角地区城市土地利用集约度水平差距较大,区位条件和经济发展水平是影响长三角地区城市土地利用集约度的重要因素。②长三角地区城市土地利用集约程度由北向南呈现明显的空间梯度差异特征,在空间分布上具有微弱的正相关性,空间分异格局明显。③各城市土地集约利用中存在的问题不尽相同,须予以针对性改善提高。

Shortage of land has been the key in the economic development of the region of Yangtze River Delta. Land intensive utilization to promote urban land use efficiency constantly is the inevitable choice to fix land shortage problem and solve conflicts between human and land. This paper explores the meaning of urban land intensive utilization from aspects of land input, land output, land eco-environmental quality and land sustainable use degree. Accordingly, an appraisal index system in agreement with the case of Yangtze delta is established. Spatial analysis with GIS is adopted on the appraisal result. And the cause of regional disparities is studied. The results are drawn as follows： ①Great difference of urban land utilization degree exists between cities in the Yangtze delta. Location and economic development level are the main reason. ②From north to south, there is dear spatial grads layout about urban land utilization degree in the Yangtze delta. Slight positive spatial autocorrelation is found and regional disparities are obvious.③Problems about urban land intensive utilization are not the same among the 16 cities. It＇s necessary to improve it respectively.