All beaches lose and gain sand

Sand is lost during falling tide and gained during rising tide

In a perfect world those two are equal, but few Nulla However, well drained beaches seldom lose sand. A well drained beach can accommodatemore water and the swash sink in easily leaving sand on the beach during each swash cycle.

As the tides move up and down on a normal beach fine particles move as well, and form thin layers in the beach, that limit the beach's ability to drain effectively during falling tide. With the PEM System installed the beach's ability to drain is restored, and the beach will grow.

The hydraulic changes caused by PEM are minimal. The improved drainage at the PEM modules, result in a few extra sand grains staying on the beach during each swash cycle in stead of being washed back to sea. At 3 - 5 million swash cycles a year the beach will eventually accrete. A clear effect of the PEM system is typically seen within 6-12 months.

To obtain the optimal effect you have to have circulation in the swash zone, and PEM is especially effective at high energy coasts with lots of waves.

The patented PEM system is invisible to the beach visitor, and popular among environmentalists as it is the most unobtrusive system available. Surfers will appreciate that PEM causes no or little change to the shape of the sea floor. Turtles may appreciate the wider beach as a result of the PEM accreting more sand.

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