模型是一个复杂系统的简化表达式,水文模型是一个复杂的水文系统的简化。流域水文模型是水文科学的重要手段和方法之一,是水文自然规律研究的主要工具,是解决实际问题、径流理论和计算机科学的结合,基于流域为研究对象的数学方法来描述水文循环的仿真过程。现在流域模型根据不同分类方法在国内外有很多分类,本文将分析三水源新安江模型(SXAJ)、陕北模型(SB)、水箱模型(Tank),常用参数的选择、适用条件,用户可以 The model is a simplified expression of a complex system, and the hydrological model is a simplification of a complex hydrological system. Watershed hydrological model is one of the important means and methods of hydrological science. It is the main tool for the study of natural laws of hydrology. It is a combination of practical problems, runoff theory and computer science. Based on the mathematic method of watershed, process. Now the basin model has many categories according to different classification methods at home and abroad. This article will analyze the selection of SXAJ, SB, Tank, common parameters, the applicable conditions, the user can