Anthropogenic impacts on nutrient variability in the lower Yellow River

From 2001 to 2018, the dissolved inorganic nitrogen (DIN), dissolved inorganic phosphorus (DIP) and dissolved silicon (DSi) concentrations showed decreasing trends in the Yellow River. These trends may have been influenced by the continuous promotion of protection polices and an increase in public environmental awareness. Extremely low nutrient concentration events were observed since 2014 in…