集约用地视角东北三省城市收缩效应诊断与作用机理研究

位处城镇化快速发展阶段的中国，在全球化与区域一体化浪潮中涌现了一批收缩城市、且这种趋势尚在不断加剧，引发了学术界对收缩城市发展效应的探索。本文从城市集约用地视角，结合城市土地集约度指标（城市收缩效应越显著、土地集约度越低，城市收缩效应越不显著、土地集约度越高），以城市收缩最具代表性和典型性的东北三省为例、运用比较归纳分析法对2010—2019年间东北三省收缩城市的集约用地收缩效应及其阶段性、类型性和空间分布特征进行了诊断与揭示。结果表明：(1)东北三省15个收缩城市存在集约用地的收缩效应及其类型性和阶段性发展特征，对应的土地集约度平均得分呈现出：“非收缩城市>收缩城市、综合型收缩城市>资源依赖型收缩城市>虹吸型收缩城市>区位制约型收缩城市、收缩初期城市>收缩中期城市>收缩后期城市”的发展特征；(2)土地集约格局与城市收缩识别的空间分布具有高度一致性：集约度低等级城市全部属于收缩城市、集约度高等级城市属于非收缩城市，整体呈现出“核心-外围”+“南高北低”的空间特征；(3)城市收缩是发展要素流失→城市发展能力削弱、空间生产效率降低的结果，通过“投入-产出...

Research on urban shrinkage effects in Northeast China from the perspective of intensive land use

In China, which is in the stage of rapid urbanization, a number of shrinking cities have emerged in the wave of globalization and regional integration, and this trend is still intensifying, which has triggered the exploration of the development effects of shrinking cities in academic circles. From the perspective of urban intensive land use, combined with urban land intensity indexes ( more significant urban shrinkage effect, lower land intensity; less significant urban shrinkage effect, higher land intensity), this paper takes the Northeast China with the most representative and typical urban shrinkage as examples, and uses the comparative inductive analysis method to diagnose and reveal the intensive land shrinkage effects and its stage, types and spatial distribution characteristics during 2010-2019. The results show that: (1) The 15 shrinking cities of the three provinces in Northeast China have the shrinkage effects of urban intensive land use, and have the characteristics of type and stage development, the corresponding average score of land intensity shows: non-shrinking cities > shrinking cities, comprehensive-shrinking cities > resource-dependent shrinking cities > siphonic-shrinking cities > location-constrained shrinking cities, initial shrinkage > mid-term shrinkage > late shrinkage. (2) The pattern of land intensification is highly consistent with the spatial distribution of urban shrinkage identification: the cities included in the lowest level of intensification are all shrinking cities, and the cities included in the highest level of intensification are non-shrinking cities, showing the spatial characteristics of "core-periphery "+ "high in the south and low in the north". (3) The phenomenon of urban shrinkage affects the volume of elements "flow" and is transmitted through the "input-output" chain, which has an impact on the urban land intensity. Therefore, the evaluation indicators of intensive land use embraces the combination of the variable indicators reflecting the connotation of shrinkage such as the "outflow" of development elements and the stock indicators accumulated over the years of development benefits. Then based on this, the development characteristics of the stage, type and spatial distribution pattern of intensive land use effect of shrinking cities are explained. Urban shrinkage is a complex socio-economic phenomenon and development problem. The mechanism and effects on cities still need to be supported by richer research results in order to adapt to the spatial implementation of the 14th Five-Year Plan blueprint (2021-2025) for the comprehensive revitalization in Northeast China.