Analysis of the spatial and temporal evolution of water and soil resource carrying capacity in arid region of northwest China


 To accurately reveal the spatial and temporal evolution process of water and soil resource carrying capacity in artificial oases in the arid zone of China. This paper constructs a water and soil resource analysis system based on system dynamics. Integrates cloud theory and hierarchical analysis to analyse the evolution trend of water and soil resource carrying capacity in irrigation areas. The spatial analysis technique was used to obtain a raster map of the spatial and temporal characteristics of the influencing factors, and analyse the evolution characteristics of the water and soil resources carrying capacity by integrating multi-source data. The results showed that: (1) the evaluation clouds of water and soil resources carrying capacity in 2002, 2010, and 2018 are (0.5034,0.0236,0.0071), (0.5586,00218,0.0062), and (0.5989,0.0249,0.0061), respectively. It shows that the carrying capacity of water and soil resources is transitioning from ‘critical bearing’ to ‘good bearing’, but the evolution rate is gradually decreasing; (2) from 2002 to 2018, the size of ‘good bearing’ area increased by 8.38%, while the size of ‘severe bearing’ area decreased by 6.4%.