| Abstrakt: |
Determining the capacity of regional agricultural water resources to support irrigated areas, restraining agricultural water usage, and controlling the expansion of irrigated farmland are crucial strategies for solving sustainable water use problems in the Hexi Corridor of northwest Gansu Province, China. In this paper, we applied the water balance principle and utilized the stepwise regression model to calculate the thresholds of water resource availability and the carrying capacity of the irrigated areas for the Hexi Corridor in different development scenarios. We used information on local water resources, water resource use, and the effective utilization coefficient of irrigation water. The analysis shows the following results: (1) Under the economic priority development scenario, the total exploitable water resources in the Hexi Corridor region is 48.22x108 m³, and the threshold val- ue of the carrying irrigated area is 58.92x104 -67.16x104 hm². (2) Under the ecological priority development scenario, the total exploitable water resources are 34.44x108 m³, and the threshold value of the carrying irrigated area is 37.90x104 -43.20x104 hm². (3) Under the economic and ecological development scenario, the total exploitable water resources are 41.33x108 m³, and the threshold of the carrying irrigated area is 48.41x104 -55.18x104 hm². (4) The proportion of the micro-irrigation area and the effective utilization coefficient of irrigation water have a significant positive correlation. This study can provide a basis for determining a reasonable irrigation area and optimizing the Hexi Corridor' s soil and water planning and distribution system. [ABSTRACT FROM AUTHOR] |
