Mining and Analyzing the Evolution of Public Opinion in Extreme Disaster Events from Social Media: A Case Study of the 2022 Yingde Flood in China
Abstract
Natural disasters have caused significant economic losses and casualties. Obtaining detailed disaster information and understanding public opinion during disasters are crucial for devising effective policies and ensuring timely disaster responses. With the widespread use of social media, it has become an important channel for extracting disaster information. However, accurately obtaining and revealing public opinion from social media remains challenging. This study combines the biterm topic model and support vector machine to analyze topic features. Additionally, sentiment features are analyzed using the Generative Pre-trained Transformer-3.5 model. These techniques are employed to build a social media-based flood information mining model capable of detecting the spatiotemporal distribution of public sentiment and discussion topics, including significant events impacting public sentiment. Using the 2022 Yingde flood as a case study, we explored the evolutionary patterns of public opinion on floods across three dimensions: time, space, and content. The study also explored the correlation between flooding and public opinion through geographic visualization and statistical analysis. The results indicated a precision of 89.2% and 80.2% for topic and sentiment classification, respectively. Temporally, the public response to flooding was primarily concentrated during heavy rainfall and flooding, varying with disaster severity. Furthermore, significant events or statements by public figures can greatly influence public responses to flooding. Spatially, the public response to flooding focused mainly in major urban areas and severely affected regions. In terms of content, a strong correlation was revealed between sentiments, topic distribution, and the disaster scenario. The findings can be used to analyze disaster conditions and public opinion in depth, and as a supplement of existing methods of extracting disaster information, it can enhance situational awareness for disaster emergency management and provide a reference basis for emergency relief efforts.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
This study was supported by the National Natural Science Foundation of China (Grant No. 72361035), Practical Innovation Project of Postgraduate Students in the Professional Degree of Yunnan University (Grant No. ZC-23236094), Yunnan Fundamental Research Project (Grant No. 202401BF070001-026), Yunnan Province Postgraduate Joint Training Base Project of Integration of Industry and Education, Science and Technology Plan Project of Department of Housing and Urban-Rural Development of Yunnan Province (Grant No. K00000135), and Graduate Ideological and Political Demonstration Course Project of Yunnan University (Grant No. KCSZ202301), as well as the support from Guangzhou South Surveying and Mapping Technology Co., Ltd.
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Information & Authors
Information
Published In
Natural Hazards Review
Volume 26 • Issue 1 • February 2025
Copyright
© 2024 American Society of Civil Engineers.
History
Received: Dec 9, 2023
Accepted: Jul 22, 2024
Published online: Sep 23, 2024
Published in print: Feb 1, 2025
Discussion open until: Feb 23, 2025
ASCE Technical Topics:
- Business management
- Case studies
- Disaster preparedness
- Disaster response
- Disaster risk management
- Disasters and hazards
- Emergency management
- Engineering fundamentals
- Floods
- Infrastructure
- Methodology (by type)
- Natural disasters
- Political factors
- Practice and Profession
- Public administration
- Public information programs
- Public opinion and participation
- Research methods (by type)
- Social factors
- Urban and regional development
- Water and water resources
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