我国有不少海港处在淤泥质海岸或淤泥质河口,存在着港口及航道严重淤积问题。估算年淤积量,对于维护和改善港口水域,选择和建筑新港,均有实际意义。在海港及河口,受潮汐影响,存在着往复性潮流,使泥沙运动不断经历冲刷、悬移、沉积和固结过程,循环不止。每种过程都与水流 Many seaports in our country are on muddy coasts or muddy estuaries, with serious siltation of ports and waterways. Estimating the amount of siltation in the year is of practical significance for the maintenance and improvement of port waters and the selection and construction of new ports. At seaports and estuaries, due to the impact of tides, there is a tendency of reciprocation so that the sediment movement continually experiences the process of erosion, hanging, sedimentation and consolidation, with more cycles. Each process is with water flow