海绵型公园绿地空间分布特征及其影响因素分析

Spatial Distribution Characteristics and Influencing Factors of Sponge Park Green Space

以赣州市章贡区海绵型公园绿地为例,借助ArcGIS空间分析工具,采用平均最近邻指数、标准差椭圆和核密度估计识别海绵型公园绿地的空间分布特征,利用地理探测器测算主要影响因子对海绵型公园绿地空间分异的解释力。研究结果表明:海绵型公园绿地呈聚集但不均衡的空间分布,具有“内密外疏”的特点;方向特征表现为东北—西南走向,与城市发展方向一致;空间分布密度呈中间高、四周低的态势,城镇组团的高密度与四周乡村组团的低密度形成强烈反差;影响海绵型公园绿地空间分异的因素有地形坡度、土壤质地、用地类型、径流现状、交通条件和人口密度,其中交通条件的影响力最大,用地类型和交通条件交互作用时的增强作用最显著。

Taking the sponge type park green space in Zhanggong district of Ganzhou city as an example, with the help of ArcGIS spatial analysis tools, the average nearest neighbor index, standard deviation ellipse and kernel density estimation were used to identify the spatial distribution characteristics of sponge type park green space, and the explanatory power of the main influencing factors on the spatial differentiation of sponge type park green space was measured by using geographical detectors. The results show that:(1) The park green space was concentrated but uneven in spatial distribution, with the characteristics of "dense inside and sparse outside". The direction showed northeast-southwest trend, which is consistent with the direction of urban development. The spatial distribution density was high in the middle and low in the surrounding areas. The high density of urban clusters was in sharp contrast to the low density of surrounding rural clusters;(2) The factors that affect the spatial differentiation of sponge park green space include terrain slope, soil texture, land use type, runoff status, traffic conditions and population density, of which traffic conditions had the largest impact, and the enhancement effect of land use type and traffic conditions was the most significant.