Xue et al. (2025) Comprehensive risk assessment of urban flood process based on dynamic weights and lumped impact parameters

Identification

• Journal: Journal of Hydrology
• Year: 2025
• Date: 2025-07-15
• Authors: Wanjie Xue, Zening Wu, Hongshi Xu, Huiliang Wang, Qiuhua Liang, Chao Ma, Yihong Zhou, Shanlun Xu
• DOI: 10.1016/j.jhydrol.2025.133903

Research Groups

• School of Water Conservancy and Transportation, Zhengzhou University, China
• State Key Laboratory of Hydraulic Engineering Intelligent Construction and Operation, Tianjin University, China

Short Summary

The study proposes a dynamic urban flood risk assessment method using lumped impact parameters and dynamic weights to more accurately identify high-risk areas compared to traditional static weighting approaches.

Objective

• To develop a comprehensive risk assessment framework that accounts for the dynamic nature of urban flood processes by integrating the physical mechanisms of inundation depth and velocity with the varying vulnerability of hazard-bearing bodies.

Study Configuration

• Spatial Scale: Southern area of Jinshui district, Zhengzhou, China.
• Temporal Scale: Dynamic flood process (time-varying).

Methodology and Data

• Models used: Analytic Hierarchy Process (AHP) for weight assignment, Fuzzy Matter Element (FM) method for comprehensive risk evaluation, and lumped impact parameters to integrate hydraulic conditions.
• Data sources: Technical literature (for relative damage functions) and hydraulic data (inundation depth and velocity).

Main Results

• The dynamic weight assessment approach identifies high-risk areas more accurately and aligns more closely with real-world scenarios than the static weight method.
• In the case study of Jinshui district, the total area categorized as high, medium, and low comprehensive risk peaked at 27.18% at 9:00 AM.

Contributions

• Advances urban flood risk assessment by replacing static weighting coefficients with dynamic weights that respond to changing hydraulic conditions.
• Introduces a lumped impact parameter that integrates both depth and velocity to better describe the physical hazard posed to different urban hazard-bearing bodies (e.g., population, traffic, buildings).

Funding

• Not mentioned in the provided text.

Citation

@article{Xue2025Comprehensive,
  author = {Xue, Wanjie and Wu, Zening and Xu, Hongshi and Wang, Huiliang and Liang, Qiuhua and Ma, Chao and Zhou, Yihong and Xu, Shanlun},
  title = {Comprehensive risk assessment of urban flood process based on dynamic weights and lumped impact parameters},
  journal = {Journal of Hydrology},
  year = {2025},
  doi = {10.1016/j.jhydrol.2025.133903},
  url = {https://doi.org/10.1016/j.jhydrol.2025.133903}
}