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Updated: Oct 30, 2025

Design and Construction of an Urban Runoff Research Facility
Published on: August 8, 2014
[Influence of Impervious Surface Roughness on Accumulation and Erosion of Urban Non-Point Source Particles]
Xi-Huan Shan1,2, Wen-Xia Xie1, Yun-Jie Liao2
1College of Environmental Science and Engineering, Qingdao University, Qingdao 266071, China.
Surface roughness significantly impacts street dust accumulation and removal during rainfall. Understanding this relationship aids in predicting urban non-point source pollution loads.
Area of Science:
- Environmental Science
- Hydrology
- Urban Planning
Background:
- Impervious surfaces in urban areas contribute to non-point source pollution.
- Limited research exists on how surface microstructure affects street dust runoff.
Purpose of the Study:
- To quantify impervious surface microstructure (roughness) and its effect on street dust.
- To analyze the correlation between roughness, dust accumulation, and scouring during rainfall.
Main Methods:
- Field observations of 12 rainfall events.
- Quantification of impervious surface structural depth (roughness).
- Correlation analysis between roughness and dust characteristics.
Main Results:
- Surface roughness significantly influences dust accumulation and scouring.
- Stronger correlations found between roughness and dust accumulation (r=0.664) and scouring (r=0.527).
- Roughness impact varied with particle size, affecting accumulation and scouring differently.
Conclusions:
- Roughness and rainfall are key factors in predicting surface runoff pollution.
- Linear regression models incorporating roughness and rainfall effectively predict total suspended solids (TSS).
- Findings offer new insights for urban non-point source pollution assessment.
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