Humanity’s struggle with floods has revolved around living near water bodies and attempting to prevent and control inundations. With the expected increase of floods in the future due to global climate change and acknowledging the rising uncertainty of weather phenomena, humans should learn to cope with natural floods. Gilbert F. White’s flood adjustment approach, which is used in floodplain management, can harmonize the relationship between humans and floods by regulating people’s development behavior in floodplains and adjusting the management of land use and the flood resistance standard of buildings in such areas so as to alleviate flood disasters and promote the coordinated development of the economy, society, and environment in these areas. The US, EU, France, and the Netherlands have formulated relevant policies and implemented practices under the guidance of White’s principles. In recent years, flood resilience theory and resilience planning have become the focus of flood management. However, flood adjustment still has some limitations, such as lack of independence, lack of comprehensiveness and systematization, limited application scenarios, unresolved contradiction with human survival and development needs, and an insufficient spatial scale, necessitating further research and verification. Cities in the floodplains of China should learn to harmoniously coexist with floods and thus achieve ecological environmental protection and sustainable development through flood adaptation planning of urban-rural integration.

Urban park green space effects a critical role in addressing adverse climate and uncertain disaster events. Thus, it is exceedingly significant for evaluating and analyzing the disaster prevention and resilience ability of urban parks and for enhancing their disaster prevention function. Using ArcGIS software, the study analyzed the kernel density pertaining to the spatial distribution of park green space in Haigang District, Qinhuangdao City. The results indicated that there is a spatial mismatch between park green space resources and population distribution in Haigang District. If Tanghe Park is considered as the research object, the Fuzzy Delphi method and analytic hierarchy process are utilized to construct an evaluation index system, and 13 indexes from three dimensions, namely safety, accessibility, and infrastructure were evaluated to analyze the problems pertaining to the disaster-prevention resilience design of the park. Subsequently, the following corresponding strategies are proposed: optimizing the human-oriented spatial layout and building a nested disaster prevention network system; strengthening the park’s multi-disaster comprehensive defense capability and stabilizing the ecological security function; increasing the safe and effective escape area and enhancing the park’s functional space layout; and replenishing emergency infrastructure resources and establishing dynamic emergency management plans.

Different symbiotic scenarios were designed and combined with oyster shell pollution management cases in two different counties (labeled A and H in this study) using symbiosis theory and a game simulation model to investigate the conditions for realizing multiparty symbiosis in oyster shell pollution management. The results show that the primary condition for achieving a virtuous cycle of tripartite governance is active governance by the government. To realize such tripartite governance, it is necessary to reduce the cost of government regulation and change the government's concept and value orientation; to reduce the cost of social capital contracted for participation in governance to improve the sustainability of social capital in the case of governance participation; and the villagers’ public, as the destroyer of the environment and the beneficiary of governance, should change their traditional concept of governance. Changing the traditional concept of the villagers would improve the benefits that the villagers can obtain by participating in governance, and this should be supplemented with corresponding reward and punishment mechanisms to increase the cost of the villagers’ choice not to participate. If the conditions listed above are met, the system will enter a virtuous cycle of tripartite governance. Based on this, we hope to seek a sustainable and replicable oyster shell pollution management path through the experiences of oyster shell pollution management in both A County and H County, so that we can better promote the rural revitalization strategy and realize the construction of a beautiful China.