长三角城市公园与人口密度的标度律分析

Scaling Law Analysis of Urban Parks and Population Density in Yangtze River Delta

城市公园配置不均衡与人口高度聚集是长三角城镇化进程中面临的重要问题之一,深刻把握城市公园与人口密度之间的客观规律,有利于探明与人口聚集状态相协调的公园建设路径。文章选用2020年长三角城市公园和人口密度相关指标截面数据,引入标度律模型,探析二者在长三角城市的标度律。结果表明:(1)整体标度律特征方面,公园与人口密度存在非线性关系,其中,公园率、人均公园面积呈超线性模式,为集聚效应的体现,公园密度呈次线性模式,具有规模效应;(2)分类标度律特征方面,苏、浙、皖三省与不同人口密度城市公园要素均符合长三角整体标度律,并存在趋同聚集的空间规律。研究结论可为适配城市人口密度的公园建设提供科学指导,亦是标度律在城市可持续发展层面的应用延伸。

The unbalanced allocation of urban parks and high population concentration is one of the important issues in the urbanization process of the Yangtze River Delta,and a profound grasp of the objective law between urban parks and population density is conducive to identifying the ways of park construction that are coordinated with the state of population concentration.The article selects the cross-section data of urban parks and population density in the Yangtze River Delta in 2020,and introduces the scaling law model to analyze the scaling law of the two in the Yangtze River Delta cities.The results show that:(1)In terms of overall scaling characteristics,parks and population density have a nonlinear relationship,in which the park coverage ratio and park area per capita are in a super-linear pattern,which refl ects the agglomeration ef fect,and the park density is in a sub-linear pattern,which has a scale ef fect;(2)In terms of categorical scaling characteristics,the three provinces of Jiangsu,Zhejiang and Anhui and the parks in cities with dif ferent population densities are in line with the overall scaling law of the Yangtze River Delta,and the spatial characteristic of aggregation and convergence exists.The conclusion of the study can provide scientific guidance for the construction of parks that are suitable for the population density of cities,and it is also an extension of the application of the scaling law in the sustainable development of cities.