基于G2SFCA的武汉市中心城区公园绿地空间公平性分析

doi:10.18402/resci.2017.03.05

Abstract

Abstract:

Public green plays a significant role in improving living standards. As an important public resource,the service scope of public green must cover a larger area to satisfy the recreational needs of residents and make good use of its social service functions. The commonly used indices for measuring the function of public green ,such as average public green and overall percentage green area can hardly reflect the distribution of public green. Previous studies usually measured accessibility of public green spaces in order to allocate resources but have failed to reveal relationships between demand from population and supply generated by public green,and neglected the influence of range attenuation on supply and need. To discuss spatial equity of public green at resident parcel, this article chooses seven administrative districts in Wuhan as a case study area and uses the gravity two-step floating catchment area method with distance decay. The results show that:(1) the distance can change the pattern of spatial equity and there are existing notable differences in different level of public green when the catchment makes changes. (2) Majority of case area have an oversupply or undersupply service of public green, while some area has insufficient access to public green within the catchment sizes of 0.50h or 0.75h. (3) Within the same catchment size, the local level of public green can provide better services for residents than district public green. (4) The vast area characterized by unbalanced distribution of spatial equity, which have differences at different sub-districts. The primary factors, such as service capacity, amount of population or public green, have effect on the pattern of spatial equity. The article demonstrates that it is necessary to allocate public green considering the demand from residents to utilize public facility effectively.

Key words: G2SFCA, public green, accessibility, equity, supply, demand, Wuhan

Jiwei XU, Shiming FANG, Chunyan LIU. Spatial equity of public green in Wuhan central districts based on gravity two-step floating catchment area method[J].Resources Science, 2017, 39(3): 430-440.

Figures/Tables 8

Figure 1

Figure 2

Figure 3

Table 1

Different levels of supply and need with the meaning of equity"

级别	取值范围	供需情况	空间公平性
Ⅰ	$E i$ >1.00	供给饱和	严重不公平
Ⅱ	0.75≤ $E i$ ≤1.00	供给充足	较为公平
Ⅲ	0.5≤ $E i$ <0.75	供需均衡	公平
Ⅳ	0.25≤ $E i$ <0.50	供给不足	较为不公平
Ⅴ	0< $E i$ <0.25	供给缺乏	严重不公平
Ⅵ	$E i$ =0	无供给服务	-

Table 1

Figure 4

Figure 5

Figure 6

Table 2

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	全市性公园		区域性公园
	0.5h	0.75h	0.5h	0.75h
Ⅰ供给饱和	红卫路街道	水果湖街道	白玉山街道	红卫路街道
Ⅱ供给充足	万松街道	万松街道	徐家棚街道	二七街道
Ⅲ供需均衡	汉兴街道	万松街道	中南路街道	水果湖街道
Ⅳ供给不足	无	无	万松街道	丹水池街道
Ⅴ供给缺乏	无	无	关山街道	长丰街道

Spatial equity of public green in Wuhan central districts based on gravity two-step floating catchment area method

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