An omnibus model is used to calculate runoff yield . it consists of two runoff yield patterns . one is swb model , which means the runoff yields at the time when the rainfall intensity exceeds the infiltration intensity 本文采用垂向混合产流模型进行产流计算,采用简单水量平衡模型swb来计算超渗产流,然后按蓄满产流模型来计算蓄满产流。