多年来由于缺乏地形资料,我们对磨刀门浅海区的冲淤情况不太清楚,给工作带来很多困难。最近,根据去年底完成的修改图进行了一些研究,拟就1964～1977年的变化,对冲淤的发展趋势谈一些看法。一、纵向深槽的发展 .东槽浅海东面的横洲口深水槽,是磨刀门迳流出海通道。深水槽随着河口的淤积而下移,13年中,纵断面内 Over the years due to the lack of topographical data, we are not aware of the situation of scouring and silting in the Shamianmen shallow sea area, which brings many difficulties to the work. Recently, some studies were carried out based on the revised plan completed at the end of last year. Some suggestions were made on the changes from 1964 to 1977 and on the development trend of scouring and silting. I. Development of Longitudinal Deep Grooves The Hengchao Hau deep trough in the east of the shallow trough of the East Trough is a sharpening gate that flows out of the sea channel. Deep sink with the deposition of estuary and down, 13 years, longitudinal section