MAINTENANCE OF A NAVIGABLE CHANNEL THROUGH A BREAKTHROUGH AREA

摘要

The engineering problem described is one which is encountered on a portion along the Northeastern coastline where tidal currents and shifting sands are predominant features. Due to the extreme local variability of such phenomena, generalizations and similar precedents from which a solution might be adopted are seldom available. It is therefore necessary to attempt to reduce such problems to elements which can be treated by fundamental concepts. With this viewpoint, the proposed solution has been developed by applying elementary principles of energy dissipation to the local situation of a natural water passage, in which flow due to a tidal differential is essentially in one direction.