A common problem with the open channel in silty mud coast area is siltation,and the drastic sand siltation under the actions of storm wave occurred frequently.

• 粉砂淤泥质海岸开挖的开敞航道,普遍存在淤积问题,而且在风暴浪作用过后,经常出现泥沙大量骤淤现象。