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Updated: Aug 7, 2025
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Design and Construction of an Urban Runoff Research Facility
Published on: August 8, 2014
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The Effect of Design Rainfall Patterns on Urban Flooding Based on the Chicago Method
Jian Chen1, Yaowei Li1, Changhui Zhang1
1Water Conservancy College, North China University of Water Resources and Electric Power, Zhengzhou 450046, China.
Summary
The Chicago rainfall pattern
Area of Science:
- Hydrology
- Urban Planning
- Water Resource Management
Background:
- Design rainfall is crucial for flood estimation, especially where data is scarce.
- The Chicago rainfall pattern is effective for urban, short-duration design rainfall.
- Urban flooding impacts infrastructure and safety, necessitating accurate rainfall pattern analysis.
Purpose of the Study:
- To analyze the influence of design storm rainfall patterns on urban flooding.
- To compare inundation extent and water accumulation under varying rainfall patterns.
- To provide guidance for urban flood forecasting and early warning systems.
Main Methods:
- Numerical modeling of hydrological and hydrodynamic processes.
- Simulation of design rainfall with varied recurrence periods and peak intensities.
- Case study analysis using the central city of Zhoukou.
Main Results:
- For recurrence periods < 20 years, smaller peak ratios lead to greater waterlogging volume and inundation extent.
- For recurrence periods > 20 years, this pattern reverses.
- Increasing return periods reduce the difference in peak inundation volume caused by varying peak rainfall.
Conclusions:
- Rainfall pattern significantly influences urban flood characteristics.
- Recurrence period and peak ratio interact to determine flood severity.
- Findings offer valuable insights for urban flood risk management and mitigation strategies.
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