Water resource safety assessment of the Hexi inland river of China based on the PSR model

The Hexi Corridor is located in northwest China, and its water resources mainly rely on meltwater from the Qilian Mountains and limited precipitation. The Hexi Corridor is an important regional population center and grain production area. However, limited rainfall restricts regional development due to inadequate water resources. Assessing water resource security in the Hexi region and providing targeted recommendations are crucial for rational planning and utilization of water resources, protecting the ecological environment, and promoting development. This study employs the entropy weight method to construct a pressure-state-response (PSR) system, assessing the water resource security of various river basins in the Hexi inland area. The evaluation results indicate that since the 21st century, the comprehensive water resource security scores of the three river basins have shown an upward trend. Specifically, the economic and social systems of the Shule River Basin and Heihe River Basin are improving, while their natural systems are declining; all three systems in the Shiyang River Basin are improving. Based on these results, targeted recommendations for different areas are proposed, providing a basis for enhancing water resource security in the region.