超渗和蓄满同时作用的产流模型研究

Research on A Model of Runoff Yield Reflecting Excess Infiltration and Excess Storage Simultaneously

对于半干旱半湿润地区的某一流域来说,影响产流的主要因素除降雨量和土壤含水量外,降雨强度和下渗能力有非常重要的作用,其产流模式并非单一的,而是超渗与蓄满(超蓄)产流并存。在分析流域产流机制基础上,建立了一个能同时反映超渗产流和蓄满产流作用的流域超渗—蓄满兼容产流模型。经在半干旱、半湿润地区的尚义、横山岭流域应用,合格率分别达91.6％和86.1％,表明是合理可行的。

So far as some watershed of semiarid and semihumid areas, the main factors influencing runoff yield were rainfall intensity and infiltration capacity besides rainfall amount and soil moisture content, therfore, the models of runoff yield should include excess infiltration and excess storage at same time. On the basis of this fact, through analysing mechanism of runoff yield in the watershed, we build up a model which reflects excess infiltration and excess storage simultaneously. It was used in Shangyi watershed located in semiarid area and Hengshanling watershed located in semihumid area, the results were satisfatory,the successful rate standard is 91. 6% and 86.1% respectively.