Resources Science ›› 2017, Vol. 39 ›› Issue (3): 430-440.doi: 10.18402/resci.2017.03.05

• Orginal Article • Previous Articles     Next Articles

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

Jiwei XU1(), Shiming FANG1(), Chunyan LIU2   

  1. 1. School of Public Administration,China University of Geosciences,Wuhan 430074,China
    2. School of Geography and Environment,Jiang Xi Normal University,Nanchang 330022,China
  • Received:2016-08-23 Revised:2017-01-03 Online:2017-03-20 Published:2017-03-20

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