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【Objective】 The Jiaokou Irrigation District is a vital agricultural production base in Shaanxi Province, and this study evaluates the carrying capacity of its soil and water resources, aiming to provide a guidance for sustainable use of agricultural resources in this region. 【Method】 The indexes used to construct the evaluation system for carrying capacity of soil and water included soil and water resources, social, economic and ecological environment, based on data measured from 2016 to 2022. The TOPSIS model with combined weights was used to analyze the carrying capacity of soil and water resources, as well as the obstacles that restrict the carrying capacity. 【Result】 ① From 2016 to 2020, the carrying capacity of soil and water resources in the region had steadily improved, and the difference in carrying capacity between districts and counties in the region had gradually narrowed, despite difference in carrying capacity of soil and water resources between districts and counties still remaining significant. ② Spatially, the carrying capacity in the north of the region was higher than that in the south, across which its value varied from 0.257 to 0.621. ③ The main factors that restrict the carrying capacity of soil and water in the region were pesticide and fertilizer applications per unit cultivated land, matching coefficient between soil and water resources, soil reclamation, ecological water use, and water resource development and utilization. 【Conclusion】 The carrying capacity of soil and water resources had been leveling up in the region. Ecological environment is the key factor affecting the carrying capacity of soil and water resources. In order to comprehensively enhance the bearing capacity of the region, developing irrigation areas should consider sustainability, as well as the balance between agricultural development and ecological protection. |
