Flood risk assessment in Ya'an, Sichuan, China based on the emergy theory

Xiaolong Shu; Yufeng Ren; Zhe DuanXing LiuXiaojun HuaHuike Lei

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Flood risk assessment in Ya'an, Sichuan, China based on the emergy theory

机译：Flood risk assessment in Ya'an, Sichuan, China based on the emergy theory

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The emergy theory provides a new approach for flood risk assessment from an ecological perspective. By employing the emergy method, we used five indicators (rainfall runoff, medical workers and students per 10,000 people, social fixed assets investment, unit land GDP, and land-use types) from three dimensions (natural environment, population, and social economy) and the GIS technique to assess the potential impact and risk of a flood disaster on different regions in Ya'an City. Our findings revealed regional differences in the distribution of flood risks in Ya'an City: Lushan County and Yucheng District face the highest risks, followed by Tianquan County and Mingshan District, and Shimian County has the lowest risk. The index method was employed to analyze the regional differences. By training a back-propagation neural network with data on flood disasters in the study area, we produced a flood risk distribution map. We found that Mingshan District, Lushan County and Yucheng District have higher risks than other regions. The results largely agree with what we obtained using the emergy method. Our study shows that flood risk assessment based on the emergy theory can provide a scientific basis for flood control and disaster relief initiatives.

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来源
《Journal of water and climate change》 |2022年第2期|247-259|共13页
作者
Xiaolong Shu; Yufeng Ren; Zhe DuanXing LiuXiaojun HuaHuike Lei;
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作者单位

Hubei Key Laboratory for Smart Yangtze River and Hydroelectric Sciences||College of Water Conservancy and Hydropower Engineering, Sichuan Agricultural University, Ya'an;

Hubei Key Laboratory for Smart Yangtze River and Hydroelectric Sciences||China Yangtze Power Co., Ltd;

College of Water Conservancy and Hydropower Engineering, Sichuan Agricultural University, Ya'an;

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正文语种英语
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assessment indicators; BP neural network; emergy theory; flood risk assessment;

Flood risk assessment in Ya'an, Sichuan, China based on the emergy theory

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