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Estimated Effect of Bed Sediments and Sand Waves During Dry Season on the Safe Nautical Depth in the South Channel of the Changjiang River Estuary
Author(s): 
Pages: 37-40
Year: Issue:  2
Journal: HYDROGRAPHIC SURVEYING AND CHARTING

Keyword:  海底地貌枯季沙波安全航行现场观测长江口;
Abstract: 基于1997年、2002年、2006年枯季长江河口南港床面形态的现场观测,分析沙波发育对水深的影响.结果表明:(1)枯季南港沙波一般分布于吴淞口至中段121°44.'5E细砂、粉砂质底床区间,呈逐年向下游扩大的趋势,发育尺度由西向东逐渐变小,河床沉积物粒度组成由上游至下游逐渐细化,分选性变差;(2)沙波波高一般为0.2~1.31m,平均为0.47m,波高沿程向下游递减,水深均处于15m的上段波高虽最大可达1.31m,但足以通行第四代集装箱船,而水深降至11.8m的中段,最大波高可达0.80m的沙波发育将直接影响第四代集装箱船的乘潮入港条件.
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