从1973～1990年期间，选取了60个洪峰时段的实测资料，分析了黄河下游河道的泥沙淤积和排沙比，得出结论为，如果洪水期三门峡出库平均含沙量为100～200kg／m3时，出库洪峰流量在4000～5000m3／s之间，可把50％～80％左右0．025～0．05mm和0．05～0．1mm的两级中粗沙排入海里；洪水期出库平均含沙量为50～100kg／m3，出库洪峰流量为3500～4000m3／s左右时，可把50％～190％的0．025～0．05mm和0．05～0．1mm的两级中粗沙排入海里． From 1973 to 1990, the measured data of 60 flood-peak periods were selected to analyze the sediment deposition and sediment discharge ratio of the lower Yellow River. The conclusion was that if the average sediment concentration in Sanmenxia flood season is 100 ~ 200kg / M3, the discharge peak flow of 4000 ~ 5000m3 / s between the 50% to 80% of about 0.025 ~ 0.05mm and 0.05 ~ 0.1mm two levels of coarse sand into the sea; During the flood season, the average sediment concentration in the outflow is 50 ~ 100kg / m3, and when the discharge peak discharge is in the range of 3500 ~ 4000m3 / s, 50% ~ 190% of 0.025 ~ 0.05mm and 0.05 ~ 0 can be used. 1mm two coarse sand into the sea.