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The silting mechanism downstream of sluices and limits of the 2-D suspended sediment model to simulate the silting downstream of sluices in a tidal reach are analyzed. 分析了感潮河段牐下淤積機(jī)理及用平麪二維懸沙數(shù)學(xué)模型模擬牐下淤積存在的缺陷。