水源划分对非线性汇流的影响

本文以新安江模型为研究手段,用我国广东省马屋流域为实例,揭示了水源比例对于汇流的非线性影响。由分析成果可知,若將水源划分为地面、壤中、地下三种,则各次洪水的水源比例是不同的,但划分水源的参数与汇流参数名次洪水都相同,汇流系统基本上是线性的;若將水源划分为地面和地下两种,则划分水源的参数与汇流参数极不稳定,汇流系统为非线性的。

Effect of Different Proportion of Runoff Components on Non-linearity of Basin Concentration

This paper deals with the nonlinearity of basin concentration caused by different proportion of runoff components. An example is given of Marwu Basin located at Guangdong Province, using Xinanjiang Model for the purpose of investigation. When the runoff is divided into three components. surface runoff, interflow and groundwater runoff, the proportion of runoff components of flood events will be different, but the paramenters for division of runoff components and for basin concentration computation will be stable, the basin concentration system is basically linear. On the other hand, when the runoff is divided into two components: surface runoff and groundwater runoff, the paramenters for division of runoff components and for basin concentration computation will be quite unstable, the basin concentration system is non-linear.