Holland's giant 'Sand Motor' Junction design the Dutch - cycle 1 day ago   02:03

AFP news agency
With more than a quarter of its territory lying below sea level, the Netherlands places a high priority on protecting its coastline. In the latest example of the country's world-renowned hydro-engineering prowess, a group of Dutch engineers has created a vast artificial sandbar close to The Hague, which is intended to protect the local coast in concert with the forces of nature. Duration: 02:02

Comments 5 Comments

Ray Jonkman
My home at Monster.

Did you test it out?

I am sure the idea is patentable,but basically imagine a curtain or wall
that has flaps that open when the wave moves towards shore.
The wave would be pushing sand towards the beach.
Normally the back flow would pull sand back to the sea (erosion).
The flaps would close and stop the back flow of sand but
let the water through.Yes the flaps would be filters that allow
water flow but not sand.
As the sand piles up in front of the wall or curtain,its height
can be increased.
Em Lapa
@Maleblade a video demonstration would definitely help :)

I wonder if anyone has tried sand trapping ridges.
These would be rows of ridges/bands that would allow sand and water to flow
towards the beach but not towards the sea.
The ridges would have one way flap valves that open when flow is towards the beach
and close when it is towards the sea.
The sand would settle between the ridges as the water flows over the tops,sand valves.
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Junction design the Dutch - cycle Holland's giant 'Sand Motor' 1 day ago   02:22

The Dutch build cycle paths right on their junctions. So they must have wider streets, right? Wrong! This video shows how it is done, no extra space needed.
More info: http://bicycledutch.wordpress.com/2011/04/07/state-of-the-art-bikeway-design-or-is-it/
And see part 2 of this video too: https://ai-tube.com/videoai/5UQA9sHydH8

A real example of this intersection design is shown in this video: https://ai-tube.com/videoai/GrzNjtHeJWp