Author(s): Qian Yu; Shi Feng; Yanyan Wang; Na Li
Linked Author(s): Yanyan Wang
Keywords: Flood impact assessment socio-economic impact environmental impact
Abstract: In the context of climate change, the frequency of intense precipitation events has risen, leading to an increase in extreme floods, such as the 2021 Central European flood and the “23·7” extreme flood of the Haihe River Basin, China. These extreme floods result in significant economic losses and pose a severe threat to human lives. Moreover, they have the potential to cause environmental contamination. Therefore, this study proposes a refined socio-economic impact evaluation method and a semi-quantitative environmental impact assessment method to assess floods' socio-economic and environmental impacts. Economic impact evaluation indicators include the inundated or affected disaster-bearing bodies and the direct economic losses. Social impact indicator involves the affected population, while environmental impact indicators consider potential harm to natural reserves and other ecologically sensitive areas. is proposed. Applying this method to the Jingjiang Flood Diversion District (JFDD), we assess two scenarios, namely a 200-year flood event and a 1000-year flood event. The findings indicate that inundation areas are 845.7 km2 and 879.49 km2, respectively, affecting populations of 0.48 million and 0.5 million. The flood depths under a 1000-year event are much greater than those under a 200-year event, leading to severely affected disaster-bearing bodies and larger economic losses. The direct economic losses are 13.43 billion and 17.19 billion under two scenarios. Both extreme floods significantly impact local ecology and the environment. The proposed methodology proves valuable for decision-makers, offering effective support of decision-making and aiding in post-disaster compensation efforts.
Year: 2025