【摘要】 【目的】土壤水分的时间稳定性对于研究流域水文过程、生态保护和农业管理至关重要。然而，土壤水分在干-湿过渡阶段的时间稳定性特征和影响因素研究尚有空白。【方法】本文采用时间稳定性指数（ITS）研究了复杂地形森林流域不同时期（湿季、干季和湿季-干季过渡期）的土壤水分时间动态，基于冗余分析（RDA）和线性相关分析，探讨了环境因素对土壤水分时间稳定性的影响。【结果】不同时期的土壤水分时间稳定性和主要影响因子有明显差异。湿季的土壤水分时间稳定性较高，主要受土壤-地形属性影响，而在其他时期则相对较低；干季时间稳定性受综合环境因素影响，其中土壤组成起主要作用；而过渡期的时间稳定性受优先流的显著影响和土壤-地形属性的控制。研究区域内存在35号和65号站点2个代表性位置，用于预测流域土壤水分平均值精确度较高（R~2=0.91）。【结论】研究结果加深了对流域水文过程的认识，有助于更好地理解不同条件下复杂地形森林流域的土壤水分时间稳定性特征及其外部环境的综合效应。更多还原

【Abstract】 [Objective] The soil moisture temporal stability is crucial for studying catchment hydrological processes, ecological conservation and agricultural management. However, few studies of the soil moisture spatiotemporal dynamics in complex terrain during wet-dry transitions were conducted. [Method] This study investigated the temporal stability during different periods(wet seasons, dry seasons, and wet-to-dry transitional periods) using the Index of Temporal Stability(ITS). Through Redundancy Analysis(RDA) and Pearson correlation analysis, the influence of environmental factors was explored on the soil moisture temporal stability. [Result] The results showed that the temporal stability of soil moisture was quite different during different periods and is influence by different factors.The soil moisture exhibited higher temporal stability during the wet seasons, primarily controlled by soil-terrain attributes, whereas it is relatively lower during other periods. The temporal stability during dry seasons was comprehensively influenced by many environmental factors with soil composition. The temporal stability during transitional periods was significantly affected by the preferential flow frequency and also controlled by soil-terrain attributes. There are two representative locations, Site 35 and Site 65, which can predict the catchment mean soil moisture with high accuracy(R~2 = 0.91). [Conclusion] These findings enhance our understanding of catchment hydrological processes and contribute to a better comprehension of soil moisture temporal stability in forest catchments and the combined effects of their external environments.更多还原