This paper introduces the theory of water transfer among the interfaces of water cycle process and the concept and development of soil - plant - atmosphere continuum (SPAC) , and illustrates the main research achievements at home and abroad. Based on the investigation of various typical SPAC models, a systematic introduction and comparison about their basic structures, application scopes, main research objects, advantages and limitations are made. The difficulties and problems in the interaction process and simulation of soil - plant - atmosphere system are also proposed. It will be the main challenge in the future to deal with the complex relationship between underlying surface and soil - plant - atmosphere system as well as the problems of scale conversion. Furthermore, it will be an important research direction to achieve accurate and simplified modeling of water transfer process among different interfaces by means of parameter optimization in the models.%介绍了水循环过程中界面水分迁移转化理论,及SPAC连续体的概念及其发展过程,阐明了一些国内外SPAC理论研究的主要成果；对国内外各种典型土壤-植物-大气界面模型的基本结构、适用范围、主要研究对象、优势以及局限性做了系统介绍和对比；在此基础上对土壤-植物-大气系统的相互作用过程以及系统模拟中存在的问题提出了展望.分析得出如何解决下垫面与土壤-植物-大气系统复杂的关系,以及尺度转化问题将是面临的主要挑战.认为借助于水分和能量交换过程中的模型参数优化,来实现界面中水分迁移过程的精确化和简化模拟是未来的重要研究方向.
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