The urbanrural interface is the frontier of urban expansion and rural development. Understanding the differentiation and driving mechanism of the urbanrural interface could help policy-makers mitigate negative impacts of development and promote integration through proper planning. Taking Nanjing as an example, this study provides new insights into the different types of urbanrural interfaces and what drives their. differentiation. We first built a conceptual framework to hypothesize how the urbanrural interface was differentiated. Based on multiple datasets, a two-step classification method (random forest model and k-medoids) and the multinomial logistic regression (MLR) model were then introduced to identify different urbanrural interfaces and explore influencing factors, respectively. The results show that 341 communities/villages were identified as belonging to the urbanrural interface, with 37 communities/villages as urban-dominant, 128 communities/villages as intertwined, and 176 communities/villages as rural-dominant. Most mean values of land use, demographic, and socioeconomic characteristics decreased sequentially from urbandominant to intertwined and rural-dominant interfaces. MLR results indicated that transportation and economy were common drivers, while policy orientation, planning, and location accounted for the different urbanrural interfaces. In combination with the conceptual framework and additional investigations, this study concluded the driving mechanism of urban-rural interface differentiation in Nanjing. Specifically, the development of urban-dominant interface was mainly promoted by local governments; the development of intertwined interface was usually driven by complicated factors with the involvement of many stakeholders; policies facilitated by central/regional government accounted more for the development of rural-dominant interface. With the above analysis, this study further discussed the relationship between the urbanrural interface and planning system, and proposed differential development and management suggestions for the urban-rural interface.

中文翻译：

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城乡界面分异及其驱动机制——以南京市为例

城乡结合部是城市扩张和乡村发展的前沿。了解城乡界面的分化和驱动机制可以帮助政策制定者减轻发展的负面影响，并通过适当的规划促进一体化。以南京为例，本研究为不同类型的城乡界面及其驱动因素提供了新的见解。差异化。我们首先建立了一个概念框架来假设城乡界面是如何区分的。基于多个数据集，引入两步分类方法（随机森林模型和k-medoids）和多项逻辑回归（MLR）模型来分别识别不同的城乡界面并探索影响因素。结果显示，341个社区/村庄被确定为城乡结合部，其中37个社区/村庄为城市主导型社区/村庄，128个社区/村庄为交织型社区/村庄，176个社区/村庄为农村主导型社区/村庄。大多数土地利用、人口和社会经济特征的平均值从城市主导界面依次下降到交织和农村主导界面。国土资源部的结果表明，交通和经济是共同的驱动因素，而政策导向、规划和区位则解释了不同的城乡界面。结合概念框架和补充调查，本研究总结了南京市城乡界面分异的驱动机制。具体来看，城市主导界面的发展主要由地方政府推动；交织界面的开发通常由复杂的因素驱动，涉及众多利益相关者；中央/地方政府推动的政策更多地促进了农村与主导界面的发展。基于上述分析，本研究进一步探讨了城乡界面与规划体系的关系，并提出城乡界面差异化开发与管理建议。