The nonuniform coefficient is defined as the ratio of mean square deviation of mean interval discharges in a year to mean annual discharge of the year and it is a standard statistics.

• 该方法以年内各时段平均流量的均方差与年平均流量的比值作为径流年内分配的不均匀系数，用标准的统计量定量描述径流年内分配的不均匀性；