长江口北槽一期工程后滩槽沉积物分布特征及其影响因素

根据2000年7月和2001年5—6月份长江口北槽航道及两侧滩地进行的沉积物采样分析结果，对长江口深水航道一期工程实施后的滩槽泥沙交换情况以及在自然与工程双重影响下的沉积物分布情况进行了较为详细的讨论。长江口深水航道工程的实施，影响了长江口尤其是北槽及两侧滩地的水沙条件和沉积物分布。强劲的径流和潮流作用和风浪作用造成航槽及两侧滩地的冲淤转换及沉积物分布的变化；深水航道治理工程的实施使工程段内航槽泥沙粒径粗化，两侧滩地和工程段下游泥沙中值粒径变细，这反映了在工程实施后滩槽泥沙交换的变化。

Distribution Characteristics of Channel and Shoal Sediment and Its Affecting Factors After the First Phase of the Changjiang River Estuary North Channel Project

Based on the analysis results of sediment collected from the Changjiang River estuary north channel in 2000 and 2001, the shoal-channel sediment exchanges and sediment distributions after the first phase of the Changjiang River estuary deep water channel project are discussed in detail. The implementation of the deep water channel project has affected the water and sediment conditions of the north channel and its side shoals and the sediment distributions. The strong runoff, tidal current and wind wave actions cause the scour and siltation conversion and changes in sediment distribution of north channel and its side shoals; the implementation of the channel project makes the sediment grain size in the project section channel coarser and the sediment grain size in the side shoal area and the downstream of project section finer, which refects the changes in shoal-channel sediment exchange after the implementation of the channel project.