Undercurent Stabilizers
Here are recent pictures from a project on the coast of Saudi Arabia using nothing but undercurrent stabilizers. According to the engineering company who did the work, the beach accreted at a rate of two feet a day until the beach reached the designed width.
No dredging was required. The same engineering company has installations of undercurrent stabilizers that are decades old and still in good condition. This company has also had failed projects. The company claims to have improved hundreds of miles of beach along the Great Lakes and elsewhere.
Undercurrent Stabilizers are engineered formations of GeoTex shapes placed at specific locations along an area of beach. The company contends that when the project is properly designed and properly installed that the process restores a beach permanently.
Unlike groins and jetties, undercurrent stabilizers appear to be visually unintrusive.
Undercurrent stabilizers are most likely less expensive than either groins and jetties.
I have read that the same problems exist for geotubes as groins in that both adversely affect downdrift beaches. I suspect the geotubes have a lesser affect.
The project picture above does not appear to have the usual scolloped beach profile usually associated with groins.