建造河口防咸海船闸的基本目的,是在保持海、河之间通航的条件下,防止海潮涌入河道引起河水咸化。但在实践中,人们逐渐发现,事情并不完全如此,当船舶通过船闸时,仍伴有大量的海水侵入河道和大量的淡水流失入海。为了解决这个问题,荷兰等国已研究寻求在海船闸上防咸的措施将近四 The basic purpose of the construction of the estuary saltwater sea lock is to prevent the influx of sea tide into the river to cause the salinization of the river under the condition of keeping the navigation between the sea and the river. However, in practice, people gradually realized that things were not entirely true. As the ship passed the ship lock, a large amount of seawater was still intruded into the river course and a large amount of fresh water was lost to the sea. In order to solve this problem, the Netherlands and other countries have studied the measure of seeking salty salvage on the ship lock nearly four