SIMHYD模型在Goulburn流域中的应用

Application of SIMHYD Model in Goulburn Catchment

介绍了SIMHYD降雨径流模型的基本结构及计算原理,并用该模型对Goulburn流域的主要产流区Eildon以上汇流区进行了校核和验证。研究区的降雨数据采用澳大利亚昆士兰州基础工业部的Rainman Streamflow数据光盘,由于光盘数据省略了降雨量为0的所有天数,因此在该研究中用Visual Basic编写了1个Excel的宏程序对记录数据中降雨量为0的情况进行了处理。结果表明,该模型可以很好地对该流域月径流进行模拟,采用的Nash-Sutcliffe效率系数在校核和检验期分别达到了90.6%和94.0%。该模型不仅具有结构简单、参数较少的特点,而且考虑了超渗与蓄满2种产流机制,对输入资料要求低,一般流域资料都可以满足其输入需要。因此,模型具有适用范围大、易于推广应用的优点。

The structure and calculation principles of a rainfall-runoff model, SIMHYD model, were introduced. Based on the data of the main water originating watershed in the Goulburn catchment, the model was calibrated and verified. The rainfall data used in this study was from a CD called Rainman Streamflow made by the Primary Industry of Queensland, Australia. In this CD, all the data with null daily rainfall were neglected. In order to make the input file for the SIMHYD model, which asked daily rainfall data even with a null value, a excel macro was made to fill in those data. The results showed that SIMHYD model could very well simulate this catchment, with a Nach-Sutcliffe coefficient of 90.6% and 94.0% for calibration and verification respectively. The advantages of SIMHYD model were not only for its simple structure and a few parameters, but also its consideration of infiltration excess and saturation excess runoff generation mechanisms. Furthermore, the requirements of input data to SIMHYD model were low, which were available for most of the catchment. So this model could be widely used.