流量过程线分割的新方法——应用分析

介绍了基于Horton下渗能力曲线的流量过程线分割的新方法的计算流程。选择猴子岩、西峡、东湾、王窑水库和尚义五个分属于不同气候区流域的降雨径流资料。采用该方法对流量过程线进行分割,并与现行的非线性水库假设分割法和数字滤波分割方法相比较。结果表明,该方法是具有物理机制的、客观的分割方法,分割的结果符合水文的基本规律,比其他两种方法更加合理,对于流域时段单位线和降雨径流关系的推求均有重要的意义。

A New Method for Base Flow Hydrograph Separation

This paper presents the flow chart of a new method for base flow hydrograph separation based on the Horton infil- tration capacity curve.Five watersheds located in different climatic areas are selected as study cases.The computation re- suits are compared with the other separation methods based on the nonlinear reservoir assumption and the digital filter.It is found that the inflow and outflow of the base flow hydrographs separated by the new method has physical means and expla- nation in accordance with the hydrological reality,and is more rational than those of the other two methods.The proposed method is very useful for unit hydrograph analysis and for the study of the rainfall runoff relationship.