Answered

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The town of Grand Isle, Louisiana, is built on a barrier island that has been shrinking for decades. They have tried the following approaches to protect the island from coastal erosion. Which of these is not a feature intended to simulate natural barrier island beach processes?

A. Offshore sand dredging and deposition to rebuild the beach
B. Placement of large concrete donuts on the seabed in the surf zone
C. Placement of groins
D. Construction of artificial dunes and planting coastal grasses on the dunes

Sagot :

GinnyAnswer

Final answer:

Groins interrupt natural sand flow on beaches, causing erosion downstream, while other methods mimic natural processes to stabilize barrier islands.


Explanation:

Groins are barriers built perpendicular to the shore to interrupt longshore transport and trap sand upstream, causing erosion downstream. On the other hand, the placement of artificial dunes and coastal grasses, offshore sand dredging and deposition, and large concrete donuts on the seabed mimic natural barrier island beach processes by encouraging sediment buildup and beach stabilization.


Learn more about Barrier islands and coastal erosion here:

https://brainly.com/question/32877726


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