TV147
国家重点基础研究发展规划(973)项目(G199904360403)
根据黄河下游实测资料分析河槽萎缩变化,采用断面过水面积、同流量(Q=3000m3/s)水位作为河槽萎缩指标,利用水沙系数(平均含沙量与平均流量比值)反映水沙条件变化,建立了河槽萎缩指标与水沙系数的关系,表明河槽萎缩指标与水沙系数有一定的变化规律。
According to field data of the Lower Yellow River,the river shrink variation has been analyzed.The cross section area of river channel and water level at Q=3000m 3 /s have been chosen for index of river channel shrink.Water sediment coefficient (averaged sediment concentration to averaged discharge)has been used as the variation of water and sediment condition.The relationship between river channel shrink and water sediment coefficient has been established.The results indicate that the river shrink has a definite relation with water sediment coefficient in the Lower Yellow River.
