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What is happening to the sand?

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by

Emma Pratt

on 31 March 2011

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Transcript of What is happening to the sand?

What is Happening to the Sand?! The Characteristics of a Beach Beach erosion is becoming a serious problem. The causes of erosion are:
Sand coming on to the beach from rivers, lakes, waves, tides, etc.
Storms and even, calm weather can cause erosion.
Human recreation such as dredging, river modification, removal of vegetation, and installation of protective structures. Some cases of erosion are extremely dangerous and serious, like in this scary video. We try to prevent erosion, but sometimes it only makes it worse. Type of Erosion Control: Jetties PROS OF JETTIES:
The intention of the jetty is to prevent sediment lacking areas from erosion.
Big tourist attraction for recreation purposes. CONS OF JETTIES:
They make erosion on beaches worse.
Because they make erosion worse, more shoreline stabilizations are needed. Type of Erosion Control: BREAKWATERS PROS OF BREAKWATERS:
The width of the upper part of the beach will become larger, therefore increasing tourist attraction.
New dunes may develop in the lee of the breakwater.
The structure allows the dune process to keep going.

THE CONS OF BREAKWATERS:
Erosion will continue to happen in the lee of the breakwater for several years after the construction.
Causes erosion of downdrift stretches on beaches.
Dangerous for anyone that may be standing on them in case of extreme high tides drifting in.
Causes unwanted odors, unsafe beach areas, and build up of jetsam and seaweed. Type of Erosion Control: Beach Renourishment PROS OF BEACH RENOURISHMENT:
Increases the volume of the sand on the beach.
Enhances the natural recovery of the dunes.
Creates more area for recreational purposes.

CONS OF BEACH RENOURISHMENT:
Sand on the upper part of the beach will be exposed to wind erosion.
The deposits may cover exsisting dune plants.
Any sand or gravel that is not a close match to the sand originally on the beach may disturb communities of invertabrates and fish.

BEST TYPE OF EROSION CONTROL: Planting of Dune Grasses and Plants THE PROS OF DUNE GRASS PLANTING:
New grass and plants will help boost restoration without ruining the environment on the beach.
It looks pretty (:
The grass catches the sand that the wind blows that causes erosion.
No hamrful damage will happen to the environment.
THE CONS OF DUNE GRASS PLANTING:
This method does not fix erosion directly.
Taking plants from other dunes can cause increased local erosion.
Construction of fences with prohibit areas of use from the beach. I think that planting dune grasses and other plants is the most effective way to help the ongoing problem with erosion. I think that it is the best way because it is using the environment to help fix the environment, which makes it not harmful at all to the beaches. Although the planting does not fix the erosion problem right from the start, it makes the dunes stronger and stronger as more erosion tries to push it's way towards those dunes. The stronger the dunes become, the more they will be able to withstand the pressure of the erosion.
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