双超模型在半湿润地区的应用

Application of the Double-Excess Model to Semi-Humid Areas

中国北方多属半干旱、半湿润地区,其降雨径流的形成过程较为复杂,既有蓄满产流,又有超渗产流.针对这种产流现象,分析其物理机制,在前人研究的基础上,探讨了适用于超渗产生地表径流、超持产生壤中流的"双超"产流模型和汇流模型,并将其应用于文峪河流域,进行了洪水模拟应用.研究结果表明,洪水过程的模拟预测结果与实测结果基本吻合;对于不同年份降雨的洪水模拟,除少数敏感的模型参数外,其它模型参数几乎不变,说明该模型弹性较好,因此该模型在这类地区具有较强的适用性和实用性.

The hydrology climate of north China is mostly semi-arid and semi-humid. The process of rainfall and runoff in these areas is complex which includes natural-stored runoff and excess-infiltrated runoff. On the basis of analyzing its physical mechanism, the excess-infiltrated runoff yield model and the natural-stored runoff yield model are investigated for the surface runoff by excess infiltration and the interflow runoff by excess retention. The double-excess model is applied to Wenyuhe catchment to simulate its flood. The results show that the flood forecasting simulating value is close to the tested data; and that except minority sensitive model parameters, other parameters have almost no change in simulating the rainfall flood for different years.