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本文模型通常可分为三类:(1)基于一定物理机制的理论模型;(2)由输入、输出导出的经验模型;(3)介于这二者之间的半理论、半经验模型。实际应用中,多采用后两种模型。但它们普遍存在两个问题:(1)模型参数是点上的测量值,但运用时却假定它具有面上的代表性,这就势必引起很大的计算误差;(2)模型中一般不考虑流域下垫面特
The model can be divided into three categories: (1) Theoretical model based on a certain physical mechanism; (2) Empirical model derived from input and output; (3) Semi-theoretical and semi-empirical model between the two. In practice, the latter two models are used more. However, they generally have two problems: (1) The model parameter is the measured value of the point, but when it is used, it is assumed to have the surface representation, which will inevitably cause a large computational error; (2) Consider the basin surface characteristics