Collaroy Sea Wall

1984 Words4 Pages

Aim:
The aim of this report is to identify the difference in sea walls at Collaroy beach and Cronulla beach and compare the structure of each sea wall too see what is most effective and productive. It will also analyse how both of the sea walls are affected by the particular wave patterns located at the beach and if these interfere with the structure of the walls. This also aims to explore how the beaches and surrounding areas were affected prior to the sea wall being constructed and the reason why the Sea wall was built in the first place.

Reason for and Impacts of the Sea Wall at Collaroy:
Prior to 2016, there was no sign of a man-made sea wall at Collaroy beach, the only form of sea wall was the naturally formed sea wall, these were the …show more content…

The holes filled with sand allow grasses to grow to reduce the effects of wind erosion and trap wind-blown sands. The name comes from the construction as it is built on a sloped wall of ceramic or concrete blocks with hexagonal holes which make it look like a honey comb. Since the construction of this sea wall at Cronulla beach there has been no further issues as the sea wall has been an affective engineered construction. The holes in the honey comb sea wall are hexagonal holes and benefit the beach in another way as it allows for natural vegetation to grow by itself in an environment that is exposed to sunlight but also with protection form the wind and sand blown sediments. Along with advantages there are also disadvantages of a honeycomb sea wall. For example, the visual eyesore and aesthetics of a honey comb sea wall both visually and practically (for the people’s sake) are negative as the straight standing rock built sea wall is much more visually pleasing and as for the honey comb sea wall it takes up much more space than the rock armour crest as it is on a diagonal slope going down the beach which then reduces the amount of sand space for humans. Majority of beaches have sea walls and majority of those sea walls have the standard more traditional sea wall rather than the honeycomb sea wall …show more content…

The research was conducted to investigate the different types of sea walls at each beach, why they were different and to evaluate the most effective structure of a sea wall. First, I drove to Collaroy and examined, took photos of the certain sea wall and in this case the surrounding areas and parts of the beach that the sea wall did not continue onto. At Collaroy, only sections of the beach have a sea wall as protection and other parts are just sand dunes where the grass from the park meets the sand, as shown in the photos above. On another weekend, I went and visited Cronulla beach to examine the particular sea wall there. The reason I chose both of these beaches was due to the fact that the sea walls were so different. Collaroy was chosen due to the major destruction of the storm in recent years ago and to why the wall was built as a result of this. Cronulla on the other hand was chosen due to the honey comb sea wall construction at this beach. This is a fairly new type of structure and is not found at many beaches, this type of structure is referred to as the ‘new and improved’ sea wall as it has proven to be a lot more successful than a regular sea wall, therefore it would be a good comparison to test for myself on which wall was most

Open Document