Environmental Science
4 years ago

Polluted Runoff Threatens Urban Rivers, Worsening Water Quality During Storms

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Journal of Cleaner Production
The effects of surface pollution on urban river water quality under rainfall events in Wuqing district, Tianjin, China
Linhan Yang, Jianzhu Li, Keke Zhou, Ping Feng, Lixin Dong

Paper Summary

Surface pollution from urban areas can worsen river water quality during rainfall. A study in Wuqing district, China, monitored five rain events to understand pollution characteristics. Pollutants like COD, TP, TN, and NH3-N were analyzed in storm runoff samples. A model showed that runoff volume increased with return period, but pollutant concentrations decreased by up to 67%. Increased runoff diluted pollutants in rivers, reducing their presence. This highlights the importance of considering runoff in managing urban river water quality.

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