【摘要】 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．更多还原

【Abstract】 Based on field data of 60 events of various floods in the periods of 1973～ 1990, thesediment accumulation and sediment delivery ratio in the Lower Yellow River have been analysed. It has come to the conclusion that about 50～80 percent of the sediment with grain size0. 025～0. 05 mm and 0. 05～0. 1 mrn will be delivered into the sea, if the mean sediment contentsare 100～200 kg/m3 and the flood peak discharges are 4 000～5 000 m3/s from the SanmenxiaReservoir in flood periods. About 50 ～190 percent of the sediment with grain size 0. 025 ～0. 05mm and 0. 05-0.1 mm will delivered into the sea, if the mean sediment contents are 50～ 100 kg/m3 and the flood peak dischanges are 3 500～4 000 m3/s.更多还原