The sedimentdeliveryratio is not correlative with the river basin area, because which is not a influence factor but a units of measurement.
流域泥沙输移比与流域面积不存在固定的线性关系，其根本原因在于流域面积是度量衡单位，而不是影响因素。
2
The dramatic change of sedimentdeliveryratio is caused by the formation of artificial sediment sinks, i. e. , sediment-trapping check-dams and reservoirs.
泥沙输移比的变化，主要是由于流域内人为沉积汇的形成所致。
3
This paper reviews the previous studies on the relationship between sedimentdeliveryratio and drainage area which reflects essentially the relationship between sediment yield and drainage area.