关键词: 城市精明增长, 城乡统筹发展, 土地精明利用, 系统调控

Abstract: The purpose of this research is to study the realization of harmonized regional urban-rural development. Firstly, this study defines the concept, interface and properties of urban-rural harmonized system. Secondly, we analyze the main influencing factors of urban-rural development. Then, the research systematically studies the urban-rural harmonized system by the use of catastrophe theory, and employs urban smart growth theory to bring forward the idea of urban-rural harmonized development utilizing land smart use to regulate urban-rural system elements. Harmonized urban-rural development is to coordinate the relationship between a city and the countryside within a regional urban-rural system. A fuzzy interface exists between the city and the countryside because of the socioeconomic development gap and the dual social system structure in urban-rural areas. There is an obvious gap of social and economic development levels between the urban area and the rural area. Therefore, urban-rural system is defined by two subsystems of the city and the villages affected by a fuzzy interface. The fuzzy interface is determined by a series of urban-rural social, economic and environmental factors. The interface of urban-rural harmonized system includes three types: interface between cities and countries, interface between the urban-rural system prior to and after harmonization, and interface between one urban-rural system and the others. The properties of an urban-rural harmonized system include the complexity of the system elements; limited scope of the system; dynamic characteristic of the system and the transformation of overall system. Main factors affecting urban-rural system harmonization are urban-rural reality, farmers' will, and government policy. Urban-rural reality is the basic platform of urban-rural harmonized development. Farmers' will is the bottom-up intrinsic motivation. Government policy is the top-down guiding force. Land is not only the basic means of agricultural production, but also space for urban construction, so land is the bridge and linkage between urban and rural areas. The connotation of urban- rural development is similar to the thinking of smart growth theory. They all realize harmonious development of the resource and environment systems and effective allocation of the economic and production elements. Urban-rural harmonized development focuses on the interaction between urban and rural areas, whereas smart growth theory focuses on the internal flow of elements in inner city. This study proposes three land smart use tools-consolidation of agricultural land; reconstruction of villages and towns; elements' reallocation. The adjustment and optimization in the amount, structure and pattern of urban-rural land use will eliminate the barriers of elements' mobility between urban-rural systems and promote the two-way flow of various elements between urban and rural areas. Land smart use can enhance rural economic vitality, ensure urban economic development, narrow the gap between urban and rural areas, and achieve the urban-rural harmonized development goals characterized by a well-off living, prosperous production, commonly shared welfare, and healthy and beautiful environment.

Key words: land smart use, system regulation, urban smart growth, urban-rural harmonized development