This study looked at water security in the Weihe River Basin in China from 2005 to 2015. By combining an ecosystem services flows model with water security assessment, the researchers found that there was a significant lack of balance between the water available and the water needed in the region. This imbalance negatively affected the sustainable development of the river basin over time. The study showed that factors like agricultural water use and population growth influenced water security. They also found differences in water usage efficiency between cities in the region, suggesting a need for water-saving practices in agriculture and urban areas. The results suggest that adjusting water pricing and promoting water conservation awareness among residents could help improve water security in the river basin and support sustainable water resource development.