**3.1 Improve the comprehensive carrying capacity of central cities and urban agglomerations**

**Optimize the layout of population functions to enhance the city's carrying capacity.** Urban agglomerations must form a reasonable allocation of population and industrial layout within the city, and form a "city-region" organizational model in terms of modern economic cultivation. Optimizing the population distribution within urban agglomerations can not only alleviate the "urban disease" caused by the excessive concentration of population in megacities, but it is also a necessary means to realize the high-level population function of world-class urban agglomerations and enhance the overall participation of the urban agglomeration in global competition. To optimize the layout of population functions with a global perspective, it is necessary to consider the differentiated needs of the diverse population structure of world-class urban agglomerations for urban space and urban functions, and improve the comprehensive carrying capacity of the urban agglomeration.

**Give full play to comparative advantages and build a multi-level power system for regional development.** To improve the carrying capacity of central cities, it is necessary to strengthen regional integration and build a multi-level dynamic system for regional development. According to the differences in the location conditions of the economy, society and resource environment, division of labor, coordination, and organic configuration form an overall process of synergy. The idea of planning and formulating the main functional zone can be followed. Some areas do the division of ecological products, and some areas do the division of industrial products. The main function is different, the area type will be different. Different regions have different development levels and advantages, so the focus of division of labor is also different. By improving regional policies and spatial layout, mechanisms for counterpart cooperation, cross-regional cooperative governance, transfer payments, and ecological compensation should be established between advantageous regions and underdeveloped regions.

**Improve the efficiency of agglomeration and tilt the allocation of construction land to advantageous areas.** In order to improve the efficiency of

agglomeration and give full play to comparative advantages, it is necessary to strengthen the flexibility of construction land management. For areas with serious population loss, land use indicators can be appropriately reduced, and land use efficiency can be improved on existing land, so as to avoid idle land waste. For those areas with long-term population growth and rapid growth, and areas with tight land use, urban space can be developed by increasing land use indicators. Or expand the scope of cities through the integrated development of urban agglomerations or metropolitan areas, and use the scale of urban agglomerations or metropolitan areas to expand market space. Peripheral cities in metropolitan areas have the greatest potential and focus for enhancing their carrying capacity. In the future, apart from adjusting administrative divisions, they can also integrate the economy of metropolitan areas or urban agglomerations for integrated development, which can also promote the development of peripheral cities in metropolitan areas.

**Promote green development and build a livable environment for ecological city clusters.** Ecological environment is the key element and bottom line of comprehensive carrying capacity. How to achieve a win-win situation for ecology and economy, first, adjust the industrial structure and energy structure, develop green industries and use new energy, reduce energy consumption, and reduce environmental pollution. Strengthen the protection of the common ecological space, strengthen the coordinated treatment of environmental pollution such as water, gas, and soil, comprehensively treat the ecosystem of large rivers and lakes, and improve the ecological benefits and environmental carrying capacity of central cities and urban agglomerations. Determine the development goals and scale of the city based on the carrying capacity of resources and environment, delineate ecological red lines, avoid the development of urban pie, and reduce the number of healthy urban garden cities. Improve the ecological and environmental protection legal system, and improve the ecological compensation mechanism and environmental compensation mechanism.

#### **3.2 Improve urban resilience with pan-smart city technology**

**Use pan-smart city technology to obtain public data.** Public data acquisition is the first step in rapid and intelligent decision-making and coordinated prevention and control of urban vulnerability emergencies. Information channels and data acquisition sources mainly include urban IoT systems, communication networks and online information. When urban vulnerability events occur, the use of big data technology can realize the identification and supervision of risk areas and specific groups of people, fully clarify the flow of various types of people, and provide a large amount of data support and early warning and decision-making for the coordinated prevention and control of emergencies; In the communication network, the biological signs and infrared data recorded by the RFID sensor, the user's comprehensive life, work, entertainment and usage habits information stored by the wireless smart phone, and the voice, text, image, and video information recorded by the base station communication system are all Precise prevention and control and the coordinated prevention and control of various functional departments provide effective support; online public opinion information and Internet browsing records on the Internet can effectively reflect the media and people's public opinion, and can eliminate rumors and guide through timely and effective data information management and guidance. Avoid panic, carry out active information dissemination at the same time, and strengthen coordination in all aspects.

**Use pan-smart city technology for data interaction and intelligent decisionmaking.** There are many problems and difficulties in urban resource management, such as the personal user privacy and security needs of ordinary people, the

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tion platforms.

**4. Conclusions**

*Climate Resilience, Megalopolis Vulnerability and Spatial Distribution*

security of business management confidential data of enterprises and institutions, and the security of confidential information of national government agencies. The distributed storage technology and consensus mechanism of the blockchain can provide reasonable and effective solutions to the above problems, and "upload" public decisions such as management and emergency to the blockchain, and arrange corresponding credit incentives, honor incentives, and material incentives In accordance with the constraints of laws and regulations, the use of artificial intelligence technology for in-depth mining of big data. On the basis of blockchain-based collaborative prevention and control, we propose a public chain for ordinary people, alliance chains for national government agencies and enterprises and institutions, and blockchain network scenarios for private chains for confidential systems. At the same time, the national policy guidelines Under the supervision of relevant supervisory agencies, formulate effective incentive mechanisms and relevant laws and regulations to promote data interaction and intelligent decision-making capabilities, and realize the efficient, safe, intelligent, reliable and authoritative of large-scale accident prevention and control of big data Reliable processing level. **Build an intelligent platform around the lifeline of the city.** The urban emergency information platform is the neural network and nerve center of the emergency management system. It plays an important role in cross-departmental emergency data management, information sharing, business collaboration and comprehensive services. It is to improve the information, scientific, intelligent and integrated service of urban public crisis management. An important means of synergy. The urban emergency information platform is an open and complex giant system. Its construction is a complex social project involving many factors and problems. It is necessary to use cloud computing technology to further improve the basic structure and functions of the platform itself, and it also needs to learn from the information resource system., Emergency data standards, data technology applications, and talent team construction are fully prepared for the construction of emergency informa-

Combining the relevant index data of the research cities, and using the urban system vulnerability evaluation index model, we calculate the 2018 Beijing-Tianjin-Hebei urban agglomeration, the Yangtze River Delta urban agglomeration and the Guangdong-Hong Kong-Macao Greater Bay Area to obtain the vulnerability of each city in 2018 Sex index. The results show that the central cities and economically underdeveloped cities of the three major urban agglomerations are relatively vulnerable areas in the urban agglomerations, and are areas with low sensitivity and high response. According to the clustering results, the vulnerability of the urban system can be divided into four levels. In the Guangdong-Hong Kong-Macao Greater Bay Area, Guangzhou is a very vulnerable area, and Shenzhen is a vulnerable area. Among the city clusters in the Yangtze River Delta, Shanghai and Suzhou are vulnerable areas; Hangzhou and Nanjing are vulnerable areas. In the Beijing-Tianjin-Hebei urban agglomeration, Beijing is a very vulnerable area, and Tianjin and Tangshan are low-vulnerability areas. The vulnerability structure of the central cities of China's three major urban agglomerations is obvious. Their economic development is in a leading position in urban agglomerations and countries. From the perspective of urban infrastructure, cities have a strong ability to deal with vulnerabilities. To this end, this paper proposes measures to respond to climateadaptive large urban agglomerations in terms of enhancing the carrying capacity of central cities and strengthening the application of pan-smart city technologies.

*DOI: http://dx.doi.org/10.5772/intechopen.95253*

#### *Climate Resilience, Megalopolis Vulnerability and Spatial Distribution DOI: http://dx.doi.org/10.5772/intechopen.95253*

security of business management confidential data of enterprises and institutions, and the security of confidential information of national government agencies. The distributed storage technology and consensus mechanism of the blockchain can provide reasonable and effective solutions to the above problems, and "upload" public decisions such as management and emergency to the blockchain, and arrange corresponding credit incentives, honor incentives, and material incentives In accordance with the constraints of laws and regulations, the use of artificial intelligence technology for in-depth mining of big data. On the basis of blockchain-based collaborative prevention and control, we propose a public chain for ordinary people, alliance chains for national government agencies and enterprises and institutions, and blockchain network scenarios for private chains for confidential systems. At the same time, the national policy guidelines Under the supervision of relevant supervisory agencies, formulate effective incentive mechanisms and relevant laws and regulations to promote data interaction and intelligent decision-making capabilities, and realize the efficient, safe, intelligent, reliable and authoritative of large-scale accident prevention and control of big data Reliable processing level.

**Build an intelligent platform around the lifeline of the city.** The urban emergency information platform is the neural network and nerve center of the emergency management system. It plays an important role in cross-departmental emergency data management, information sharing, business collaboration and comprehensive services. It is to improve the information, scientific, intelligent and integrated service of urban public crisis management. An important means of synergy. The urban emergency information platform is an open and complex giant system. Its construction is a complex social project involving many factors and problems. It is necessary to use cloud computing technology to further improve the basic structure and functions of the platform itself, and it also needs to learn from the information resource system., Emergency data standards, data technology applications, and talent team construction are fully prepared for the construction of emergency information platforms.
