Flood disaster risk and urban resilience assessment in Guangzhou based on open-source information and SDGSAT-1 nighttime light data

doi:10.13474/j.cnki.11-2246.2024.1127

Abstract

Abstract: Guangzhou is one of the 31 key flood control cities in China, which has the characteristics of heavy rain flood, transit flood and heavy typhoon impact. Researches on flood disaster risk and urban resilience assessment can provide scientific references for building a resilient city, improving modern urban governance, and achieving sustainable development in Guangzhou. This paper uses open-source geo-information and statistical data, combined with the nighttime light data of SDGSAT-1, to construct 18 flood evaluation indicators. Combined with the analytic hierarchy process, a model for flood disaster risk assessment in Guangzhou is formed. In addition, this paper refines 18 indicators to evaluate the urban resilience of Guangzhou from 2013 to 2022. The comprehensive analysis results indicate that the northern mountainous area of Conghua, the vicinity of Liuxi River in Conghua-Huadu-Baiyun, the Dongjiang-Zengjiang area of Zengcheng, and the main urban area with concentrated population are relatively high-risk areas. It also indicates that the urban resilience has significantly improved. However, there is still room for improvement in terms of adjusting population structure and increasing public safety expenditures.

Key words: flood disaster risk, SDGSAT-1, analytic hierarchy process, urban resilience, CRITIC

CLC Number:

P208

LIU Jincang, DONG Jing, WANG Huanhuan, Lü Mingyang, DING Yixing. Flood disaster risk and urban resilience assessment in Guangzhou based on open-source information and SDGSAT-1 nighttime light data[J]. Bulletin of Surveying and Mapping, 2024, 0(11): 156-161.

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