Sand by-pass system
Uit Kust Wiki
A Sand Bypass System is a permanent solution to sand erosion and littoral drift problems affecting river mouths and navigation channels worldwide. It is described as the artificial transport of littoral drift across tidal entrances to help prevent accretion, on the updrift side, control downdrift erosion and maintain navigation channels.
There are many examples world-wide but what is thought to be the world's largest sand by-pass system operates at the mouth of the Nerang River on Australia's Gold Coast see.