Spatial correlation networks and influencing factors of urban land green utilization efficiency in three major urban agglomerations of Yellow River basin
Objective The spatial correlation network characteristics and influencing factors of urban land green use efficiency (ULGUE) in urban agglomerations were investigated in order to clarify intercity interaction relationships, in order to provide a scientific basis for the coordinated improvement of ULGUE in urban agglomerations. Methods ULGUE of the three major urban agglomerations in the Yellow River basin from 2007 to 2022 was measured using an undesired-output super-efficient SBM model. Subsequently, a modified gravity model and social network analysis method were employed to explore the structural characteristics of spatial correlation networks of ULGUE within each urban agglomeration and their influencing factors. Results ① During the study period, the ULGUE of the three urban agglomerations followed this pattern: Guanzhong plain urban agglomeration>central plains urban agglomeration>Shandong peninsula urban agglomeration. ② The spatial correlation networks of ULGUE in the three major urban agglomerations exhibited complex structural patterns. Each network showed a certain hierarchical structure, and its stability tended to decrease. In each network, the siphon effects of core cities were significant, but their spillover effects on other cities remained relatively limited. ③ Geospatial proximity and differences in economic development levels were identified as common factors influencing the formation of spatial correlation networks of ULGUE in the three major urban agglomerations of the Yellow River basin. Conclusion There is significant potential for improving the tightness of spatial correlations within the ULGUE networks of the three major urban agglomerations in the Yellow River basin. In the future, each urban agglomeration should focus more on optimizing its own spatial correlation network structure, propose differentiated development pathways, and promote the coordinated development of ULGUE across cities.
文献参数: 燕思宇, 丁一, 刘慧芳, 等.黄河流域三大城市群城市土地绿色利用效率的空间关联网络与影响因素[J].水土保持通报,2026,46(2):306-317. Citation:Yan Siyu, Ding Yi, Liu Huifang, et al. Spatial correlation networks and influencing factors of urban land green utilization efficiency in three major urban agglomerations of Yellow River basin [J]. Bulletin of Soil and Water Conservation,2026,46(2):306-317.
城市土地绿色利用效率是指在一定的生产技术条件下,单位城市土地利用系统中的投入(土地、资本、劳动等)与产出(经济、社会、环境综合效益)的综合映射,其本质是以尽可能少的土地要素投入和最小化生态环境损失为代价,获取最大的经济、社会、环境综合效益[2-3]。目前,国内外关于城市土地绿色利用效率(urban land green use efficiency, ULGUE)的研究多集中在城市土地绿色利用效率内涵、时空演进及影响因素等方面。城市土地绿色利用效率时空演进研究一般采用空间关联分析,多运用传统计量模型聚焦于刻画效率空间相关性、集聚性等特征[3-5]。影响因素研究方法由传统计量经济学模型如Tobit回归模型[6]、面板固定效应回归模型等[7],逐渐向考虑空间位置的GTWR(geographically and temporally weighted regression)模型等[2,8]的方法转变,学者普遍认为城市经济规模、产业结构、科技水平、环境规制等因素影响城市土地绿色利用效率水平[2,7-9]。
数据来源于《中国城市统计年鉴》《中国城市建设统计年鉴》以及各市统计年鉴、国民经济和社会发展统计公报,缺失数据采用插值法及邻近年份数据补齐。其中,CO2排放量数据来源于EDGAR(emissions database for global atmospheric research),对所有涉及价格的数据,均以2007年为基期进行平减处理。黄河流域水系的矢量数据源自国家青藏高原科学数据中心(https:∥data.tpdc.ac.cn/)。
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