1998年洪季长江口北槽下段航道淤浅原因分析

Analysis of the Reasons for Siltation at the Downstream North Channel of the Yangtze Estuary during Flood Season of 1998

针对１９９８ 年洪季北槽下段航道＃２５５ ～＃２６０ 灯浮段出现的局部淤浅现象， 由近年来不同季节的测图资料分析研究结果表明： 这是北槽下段总的演变格局所决定； 与当时正在施工的长江口深水航道治理工程无关， 对北槽下段航道的淤浅也没有影响。

To counter the phenomenon of local siltation appeared at the section between #255～ #260 light buoys along the downstream north channel during flood period of 1998,anslyses are carried out to the mapping data of different seasons of several years.It is shown that the siltation is because of the overall evolution pattern of the downstream north channel,and has no relationship with the deepwater channel regulation project.