关键词: 广州, 生态廊道, 可达性, 网络结构, 分布特征

Abstract: The distribution characteristics, connectivity, and accessibility of Guangzhou greenway were quantified by density analysis method, network structure index method, morphological space pattern analysis method, and network analysis method. Furthermore, correlation analyses between greenway density and four socioeconomic indicators (i.e., economic development level, road network density, urbanization rate, and population density) were carried out to detect key factors influencing the construction of Guangzhou greenway. The results showed that the average greenway density in Guangzhou was 0.44 km·km^-2, and the per capita greenway length was 0.21 m. The construction center of greenway was located in “the-Four-Old-Districts” (Yuexiu, Liwan, Haizhu, Tianhe) and gradually weakened outward in the form of circles. The greenway network structure indices α, β, and γ was 0.149, 1.297, and 0.65, respectively. The network closure degree was relatively low but the complexity and the connectivity were high. 95.82% of the ecological source patches were connected in Guangzhou. The districts with excellent accessibility included the greenway network in Yuexiu, Haizhu, Liwan, Tianhe. The districts with normal accessibility included the greenway network in Baiyun, Huangpu, Panyu, Zengcheng. The districts with relatively poor accessibility included the greenway network in Nansha, Huadu, Conghua. Urbanization rate, population density, and road network density had a positive impact on the greenway construction in Guangzhou, with the value of R² being 0.749, 0.634, and 0.715, respectively. Guangzhou greenways were densely distributed in “the-Four-Old Districts”, where the network structure was relatively complete and the accessibility was generally convenient, and there was a downward trend for various indicators. To comprehensively promote the formation of a sustainable and ecological space network in Guangzhou as soon as possible, more efforts are needed to construct high-quality greenways on peripheral urban areas, optimizing the spatial structure, improving ecosystem functions, and realizing the goal of shared greenways by all citizens.

Key words: Guangzhou, ecological network, accessibility, network structure, distribution characteristics.