三层耦合流域水文模型──(Ⅰ)模型结构和数学方程

Three Layers Coupled Watershed Hydrological Model (I) Model Structure and Equation

提出和建立了一个新的三层耦合流域水文模型，简称为耦合模型，它以土壤层的含水量作为描述流域系统在降雨、径流转换过程中物理特征的状态变量，用三个耦合的线性常微分方程来描述整个流域系统将降雨转化为径流的反应机制．该模型具有概念清楚，结构简单，假设合理，模拟精度较高等优点．

A three layers coupled watershed hydrological model is proposed and developed. The model uses three ordinary differential equations to describe watershed rainfall runoff process. The model structure, mathematical equations, numerical solusion and objective functions are described and discussed in detail.