首页|Impacts of rainfall characteristics and land cover types on an urban river water quality: A case study of sponge city Beijing

Impacts of rainfall characteristics and land cover types on an urban river water quality: A case study of sponge city Beijing

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  • NETL
  • NSTL
  • Elsevier
Urbanization and climate change are intensifying runoff pollution, jeopardizing aquatic ecosystems and human health through degraded water quality. Traditional monitoring methods have proven inadequate for conducting timely impact assessments. This study investigates the impacts of runoff pollution on the water quality of receiving water bodies in the economic development zone of Beijing, China. By considering environmental factors such as rainfall and land cover types, the InfoWorks ICM model was applied to an economic development zone in Beijing. The study revealed significant relationships between rainfall characteristics, grassland proportions, and pollution levels at stormwater drainage outfalls and receiving water bodies. Specifically, shorter rainfall return periods could lead to pollution concentrations at outfalls increasing by as much as 3.75 times. In receiving water bodies, when the rainfall return period was less than 10 years, the dilution effect of rainfall outweighed the pollution effect. Additionally, the receiving water bodies exhibited significant spatial and temporal variations in water quality. Reducing pollution in receiving waters can be achieved by controlling stormwater outfall pollution within the first 15-18 min of outflow. Furthermore, managing pollution from light rainfall events (1.2-1.5 mm/h) and implementing segmented river control measures significantly reduce overall COD and NH_3-N in rivers by 12.5 % and 44 %, respectively. This study provides essential insights for managing stormwater pollution and protecting receiving waters.

Land cover typesManagement strategiesRainfall characteristicsReceiving waterStormwater pollution

Xiangyu Li、Shenglin Yang、Jing Li、Yuanqing Li、Di Liu、Feng Xiong、Junqi Li

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Beijing Univ Civil Engn&Architecture,Key Lab Urban Stormwater Syst&Water Environm,Minist Educ,Beijing,100044,China

College of water science,Beijing Normal University,Beijing,100875,China

Beijing Univ Civil Engn&Architecture,Key Lab Urban Stormwater Syst&Water Environm,Minist Educ,Beijing,100044,China||Beijing Energy Conservat&Sustainable Urban&Rur,Beijing,100044,China

2025

10.1016/j.jclepro.2025.145411

Journal of cleaner production

Journal of cleaner production

SCI
ISSN：0959-6526
年,卷(期)：2025.505(MAY.10)
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