The extensive layout of roadside green spaces make them important green disaster mitigation nodes in high-density areas of any city; hence, further improvements in their disaster mitigation functions would make the urban disaster prevention system more effective. In the present research, different types of roadside green spaces in the Gulou district of Nanjing were identified to establish a highly efficient urban disaster refuge green space system. A total of 35 built-up roadside green spaces were employed as the study site, and for field investigation and statistical analysis, 21 factors were selected from the aspects of spatial form, functional facilities, and surrounding environment. According to their disaster mitigation abilities, cluster analysis classified these roadside green spaces into four categories: complete type, potential type, centralized type, and broad type. Finally, by analyzing the characteristics of different types of roadside green spaces, corresponding optimization strategies were proposed. In comparison to previous investigations, our study focused on the quantitative evaluation of disaster mitigation and risk protection function of roadside green spaces. In the future, the obtained results will serve as important scientific references to the planning and construction of green spaces in high-density areas of Nanjing, China.
The construction of disaster prevention capability evaluation framework is the basic requirement of building a
sustainable and harmonious society under the background of urban public security. This study had constructed a framework for disaster prevention capability assessment of urban park systems applicable to China through rigorous logical
reasoning and careful selection of indicators. The framework contains 4 first-level indicators and 8 second-level indicators
and 21 third-level indicators. Quantitative methods and calculating procedures for each indicator and dynamic weight were
also given in this paper. Finally, in order to prove the practical value of the evaluation system designed in this study, five
cities in China were selected for application. The results showed that the indicator system can not only accurately quantify
the disaster prevention capability of the urban park system, but also discover the shortcomings in the process of urban park
system construction, which has strong theoretical and practical value
The widely distributed and feature-rich dotted-like green open spaces are important disaster prevention nodes in the city's comprehensive disaster prevention system. This study takes the urban dotted-like green open spaces in Qinhuai district of Nanjing City and Nishi-ku district of Fukuoka City as the research object, selects 17 aspects of space form, infrastructure and surrounding environment to conduct field surveys, and uses SPSS25.0 software to survey data perform descriptive statistical analysis and cluster analysis to reflect the problems of construction in both countries, and propose corresponding disaster prevention construction recommendations for different types of dotted-like green open spaces.
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