Research on urban space development and control of national new areas based on environmental carrying capacity

With the rapid advancement of urban industrialization and urbanization, ecological space in cities is facing the risk of being occupied and the phenomenon of urban resource and environmental overloading is becoming increasingly prominent due to unreasonable space development. The space development control system based on environmental carrying capacity is not only an important way to reflect the concept of ecological priority and green development, but also the main path to achieve the coordinated development of urban economy, society, and environment from the source. Taking the national new area Nanjing Jiangbei New Area as a case study, this paper describes an evaluation system of environmental carrying capacity. The system covers specific indicators and four factor layers for the importance of ecological protection,land carrying capacity, environmental capacity, and environmental stress. An overlay analysis is utilized to analyze factor layers based on the GIS Spatial Analysis tool. The results show that the environmental carrying capacity in Jiangbei New Area decreases gradually from the riverside to inland areas, and from the plain to hilly areas. According to the spatial distribution differences of the factor layers, this study divides the case area into four types: environmental carrying capacity saturated areas, unsaturated areas of carrying capacity but with high environmental pressure, carrying capacity sufficient area with less environmental pressure, and eco-environment safety guarantee area. Furthermore, this study puts forward different spatial access threshold and control requirements for different regions. This study not only provides technical support for promoting the comprehensive integration of resources and environmental elements into the new round of spatial planning systems, but also provides a case for China′s traditional manufacturing of developed new areas along the Yangtze River Economic Zone to explore a sustainable space development path.