Google ‘sea walls advantages and disadvantages’ and you will find many examples of where they have been constructed to protect housing and infrastructure.
You will also learn that beaches are lost where sea walls are installed; this is because solid walls can’t absorb incoming wave energy as sandy beaches can. Waves crash into walls and drag sand back out to sea.
So, a rock wall will protect the lifesaving club, housing and infrastructure along the Inverloch surf beach. But say goodbye to the sandy beach.
A short sea wall will lead to erosion around each end – as we saw with the sand bags put in place to protect the lifesaving tower.
An offshore artificial reef would reduce wave energy reaching the beach – like one being installed at Palm Beach on the Gold Coast.
Beach erosion is an expensive and difficult problem.
Aileen Vening, Wonthaggi.
Erosion’s difficult and expensive