Assessment of the Impact of PM2.5 Air Pollution on River Dynamics: A Case Study of Daqing, China.

This study aims to explore the causal relationship between air pollution and river flow in Daqing City, specifically focusing on PM2.5 particle concentration. During comprehensive five-year research, a progressive decrease in air quality was seen, shown by a rise in the yearly average PM2.5 concentration from 13.4 µg/m³ to 18.7 µg/m³. This work utilizes hydrological modeling to reveal a strong negative association between the rise in PM2.5 concentration and the decline in river flow. The decline observed can be attributed to variations in solar radiation and surface temperature, which are clearly impacted by pollution. Ecological investigations showed that the decrease in river flow led to severe ecological impacts, including higher water temperature and alterations in nitrogen levels. This study emphasizes the crucial need to implement thorough environmental management strategies to successfully reduce the detrimental effects of air pollution on river ecosystems. This study enhances our comprehension of the intricate connection between air pollution and river dynamics, on both a regional scale and within the wider context of the southern hemisphere. It highlights the worldwide significance of safeguarding clean air and water resources.