Abstract
In recent years, the deep-seated reasons for the shortage of resources and energy, the destruction of ecological environment, the decline of human quality of life and the low quality of economic growth in urban and regional development are the maladjustment of urban metabolism. As a complex and open organic dissipation system, one of the basic processes of city operation is metabolism. China has explored sustainable models of urban metabolism. On the one hand, the concept of re-ecology can be used to repair the damaged natural environment and landforms in cities and improve the quality of ecological environment. On the other hand, with the concept of renewal and darning, urban facilities, space environment and landscape landscape should be restored to enhance urban characteristics and vitality. Ecological restoration is mainly the repair of the kidney and lung of the city. First, carry out water system management and water ecological restoration, including ecological restoration of coastal waters and coastal zones, water system protection and water environment management (blue line management), natural wetland ecological restoration, and sponge city construction planning; Second, improve the green space system, including ecological red line demarcation and control, greenway network system connectivity and repair, inventory green space quality improvement and transformation; Third, soil pollution control, focusing on soil pollution control and remediation of agricultural land and land used by enterprises in key industries; Fourth, the mountain repair, mainly is to restore the mine green. Urban repair is the complement and improvement of urban shortcomings. First, the improvement of municipal infrastructure, including the construction of underground comprehensive pipe corridors and the renovation of old pipe networks in new and old urban areas according to local conditions; Second, we will improve public service facilities, including the 15-minute living circle, barrier-free facilities in the old city, day care centers for the elderly, and medical and health facilities at different levels and in different districts；Third, smart city construction, smart community, grid management, "the last kilometer" construction, etc；Fourth, to improve travel conditions, including road system repair, key areas traffic regulation, parking facilities, etc.; Fifth, the comprehensive renovation of old residential areas, strengthen the integration of contiguous old communities with the urban public service system and major projects, fill the gap in public service facilities, optimize and upgrade public space, and improve equalization of public services; Sixth, we will improve the planning system for the protection of famous historical and cultural cities, towns, villages and historical and cultural blocks, better continue the historical context, promote the renovation and upgrading of the surrounding blocks of historic and cultural blocks, and rationally protect and utilize industrial sites. In short, China's sustainable development strategy of urban metabolism is the summary of the cities across China adjust measures to local conditions for development, to matter and energy in the process of input and output in the city, and energy flow, material conversion, information feedback to optimize the urban compound ecosystem development, promote the urban metabolism process, reduce the material loss, stranded, omission or depletion, and the environmental problems.
