The Yellow River Basin has seen big changes in water flow and sediment in recent years. By studying data from 1997 to 2006, researchers found that human activities and less rainfall have caused a significant decrease in annual water flow and sediment. The reduction in water flow is mainly due to human actions, while sediment reduction is a mix of human impact and less rainfall. These changes vary across the basin, with human activities having a bigger impact on water flow in some areas and on sediment in others. Despite these changes, the relationships between water flow, sediment, rainfall, and floods in the Yellow River Basin have stayed mostly the same.