Abstract: As a vital component of natural resources,water is essential for sustaining life,while soil forms the foundation of survival.Investigating the coupling and coordination between water and soil resources is crucial for ecological conservation and the sustainable development of river basins.Based on water and land use data from 2009 to 2021,this study constructs coupling coordination degree model and multiscale geographically weighted regression model to examine the spatio-temporal evolution and key influencing factors of water-soil resource coupling in the Zhuanglang River basin.The results show that: ①From 2009 to 2021,the overall coupling coordination degree exhibited a downward trend.High coupling degrees were observed between water resources and cultivated land,forest,grassland,and wetland; similarly,high coordination degrees were found between water resources and cultivated land,grassland,and wetland.②Spatially,the distribution patterns of coupling and coordination degrees were largely consistent,with high-value areas primarily located in the northern ecological protection zone and low-value areas concentrated in the central transitional zone.③Precipitation (0.705), slope (-0.723), land use type area (0.432), and water resource utilization efficiency (0.686) were identified as the most significant influencing factors,contributing substantially to the spatial differentiation of the coupling coordination degree.Moving forward,it is imperative to enhance the rational allocation of water and soil resources,strengthen integrated planning and management,and promote the coordinated development of multiple natural resources within the basin.

Key words: Zhuanglang River basin, land use and water resources, coupling coordination, influencing factors