Change on Quality

This paper investigates the effects of change on air quality . air quality is a critical concern in this region, where climate change affects rainfall patterns, temperature, and hydrological processes. The study assesses changes in key water quality parameters such as T, dissolved oxygen (DO), nitrate concentration, and biological oxygen demand (BOD). Using historical water quality data and future climate projections, this paper highlights the potential implications for environmental management in the Basin.Human activities and climate change threaten quality in basin. We simulated the monthly concentrations of riverine total nitrogen (TN), ammonia-nitrogen (NH3-N), total phosphorus (TP), and chemical oxygen demand (CODMn) in 613 sub-watersheds of the nation’s 10 major river basins during the 1980–2050 period based on a 16-year (2003–2018) monitoring dataset using the stacking machine-learning models. The results showed that water quality improved markedly, except for the TN concentration, which was probably due to the lack of a TN control target and assessment system. Quantitative analysis indicated that anthropogenic factors were the primary controls compared with climatic drivers and geographical drivers for TN, TP, and NH3-N concentrations. On the basis of all 17 sustainable development goals (SDGs) relevant to water quality in China, the water resources, water environment, aquatic ecology and water security should be considered collectively to achieve improvements in the ecological status of China’s rivers.