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Losing beach sand due to a storm is a known phenomenon.
Various beach protection schemes do just the opposite of their
intended action. The water hits he barrier and returns to sea
with high energy, taking more sand from the beach than it
brought, effectively eating the beach away. In cliffy
houses on top this is particularly dangerous. In my country there
is an ancient town in danger of being taken down by the sea.
The solution: a multilayered net floating in the water near the
beach takes some of the energy on the way in and some on the
way back leaving the sand. Once the storm is not in full blow
pull the net up a little higher for the next time, and shovel the
sand to where it is desired.
[2 fries shy of a happy meal, Sep 07 2017]
||I think you would have a net loss.
||Surfers will have something to say about anything that ruins their surfing spots.
||I keep saying this, if you construct a series of perforated air pipes around a beach area, then aerating the water during storms will mitigate most water damage and prevent erosion.
||On a larger mega-scale it should prevent tsunamis. They would just fizzle.
||[2 fries], the thing that best stops a tsunami is a long
stretch of shallow water off-shore. Remember the 2004
tsunami in the Indian Ocean? One of the nations least
affected was Bangladesh, despite it being a just-above-
level country, because that nation surrounds the mouth of
major river, and silt deposits from that river have created
a huge area of
offshore shallow water.
||The aeration thing might be good against storm surge, but
a tsunami is basically a consequence of most of a whole
ocean sloshing, and
typically involves vastly more water than a mere storm
||This would turn into a massive pile of seaweed, algae, and
dead fish in a hot hurry.
For a while there was talk of creating enormous chutes to redirect a tsunami upwards but I'm having a hard time finding anything about that now.
The latest notion is about using acoustic gravity waves to perhaps cancel an incoming wave. [link]
||I think a better solution would be to bond the beach with a polyester resin, much like they bond gravel driveways. Admittedly, it would make sandcastling difficult; and if the ratio of polyester to sand was too high, the entire beach might float away on a high tide; but these are minor issues.
||// anti beach erosion sand net //
||Would not "Beach sand anti-erosion net" be a more concise and descriptive title ?
||But that wouldn't mean the same thing - I assume this
is an "anti-beach" erosion sand net - i.e. an erosion
sand net somehow for the purpose of destroying
beaches. I admit I haven't yet read the text of the
idea though, so may be wrong.