Dee Why Sea Wall

Seawalls are also strategies that Cronulla and Collaroy implement on their beaches. However, the seawalls in Collaroy are buried under the sand and are only visible after large-scale erosion events. Whereas Cronulla beach’s seawalls are visible and reduce the scenic

The Cronulla beach environment features a variety of issues that are both physical and human related; the most prominent issues are erosion, inappropriate development and also pollution. However despite the many issues present at Cronulla, there are a variety of coastal management strategies being administered in order to combat these problems that have a potentiating threat on the beach biome. The predominant strategies used to counter these problems are Seabee walls, Seawalls, and also signage, bins and fences; and these five solutions each have advantages and disadvantages, which ultimately prove whether or not, the strategy itself is successful.

The aim of this report is to investigate Long Reef and Collaroy Beach’s coastal management.

It has become common for sand dunes to be bulldozed to improve the views to the sea. However this destroys the natural protection of the coast. Human activities such as water transport also can cause problems for coastal areas. The dredging of navigation channels and the discharging of the material in deep water to enable larger ships to travel though water channels removes sediment from the coastal system leaving the area susceptible to erosion and will also interfere with longshore drift which will prevent the coastal beach landforms from being maintained such as the development of a spit. It is likely that a spit will be eroded and start to regress in conditions such as these.

The beach is a sand spit that stretches 2.8km long, linking to the sandstone of Sutherland Point at the east. Also the eastern side of the beach is the site on which captain cook first set foot on Australian soil in 1770. The beach is surrounded by various oil refineries and import terminals along with multiple houses that are alongside the road. There are a total of 13 groynes that have been placed in in the 1970’s to stop long shore drifts. At the end of the 13th groyne there is a jetty that stretches out for 1km that has been placed for the oil refinery. During the investigation both primary and secondary sources were discovered of the Silver beach at Kurnell. Focusing on the effects of pollution of the particular area, data was collected on the development and outcomes given from pollution. On the route to the beach there happened to a large industrial site rising many points regarding pollution, which will be discussed further

This is not just an architectural design and the fashion, but because of the fact that the developers know that the land is being swallowed by the sea. More and more houses, hotels, shops and restaurants have decks and some piers that lead into and over the water. The Florida Department of Environmental Protection even has courses for those in construction to acknowledge the erosion and increase the proper design, construction and maintenance of erosion and sediment control. The beaches, whether sandy or rocky are the buffers that keep the sea at bay from the land behind enemy lines. They are nature’s way of saving all the people and their livelihoods from being swept away into the deep blue yonder. When waves crash into the beach it carries sediment with it and deposits such sediment. The alternative is that when a wave recedes back into the ocean it carries that sediment back to sea. This is usually done at an unequal rate, and leads to coastal erosion. In fact, coastal erosion is one of the reasons we have so many beautiful beaches around the world due to their unique shape. Long shore currents move water in a parallel direction of the shoreline, carrying the sand with it. But as we continue to build piers, docks, sea walls, and jetties

This investigation will be exploring whether the movement of pebbles, shingle, shells and other materials found on the beach have impacted on the shape and structure of Newhaven beach and Castlehead Cliff. One of the key processes this investigation will focus on is that of long shore drift caused by strong prevailing winds, prevailing wind is the direction from which the wind usually blows. Cliffs are made from mainly two materials, chalk which is at the bottom and sand and clay at the top. If cliffs are facing the direction of prevailing wind it may lead in high rates of cliff

Brighton, Glenelg, The West Beach Boat Ramp, Semaphore and Largs North Beach have all been influenced by hard engineering techniques. As an example, Glenelg was one of the few beaches that had some form of a breakwater along the coast. Breakwaters are notorious for having immediate impacts on the beach, but are ultimately useful in protecting the land that meets the beach. The real question is; “Do the benefits, outweigh the negatives?”. Breakwaters are

walls. Rip rap walls are when larged rocks are piled in a certain angle to catch drifting sand and protect the beaches from harsher waves and to protect buildings from high

If you have ever lived in proximity to coastal areas you may have seen coastline erosion first hand. The beaches you frequent during the summer may seem to be getting smaller and smaller every year. Why does your favorite beach seem to be disappearing? Coastal erosion is to blame. The waves, wind, tides and currents all play a part in the mechanism that is coastal erosion. When water and wind batter the shoreline sediments are carried out to sea and deposited on the sea floor or at other points along the coastline. This is called an erosional coastline. This erosion may be very apparent or seem to have happened overnight when it happens due to a large storm or extremely high tide.

Barrier beaches are not static, they are constantly being changed (Coastal Change ) by the forces that formed them; waves and wind. One change effecting barrier beaches is they are moving closer to the main coast. This movement is caused by the rise in sea level. As the sea level rises waves crash higher and higher upon the beach, as they do this the dunes are pushed back. There are also seasonal changes in the barrier beaches. During stormy seasons sand is removed from the beach and deposited off shore on the longshore bar. During calm season waves redeposit sand upon the beach and the beach grows.

- Helps to protect exposed infrastructure behind the beach such as surf clubs, car parks and beach front

Some amount of natural erosion is necessary to provide the sediment for beaches in estuaries and coastal bays. However, excessive erosion has occurred in the past due to development. Industrial and private development along the world’s coastlines has increased dramatically since the 1970s (Nepf). Developers and builders completed much of this construction without taking into account the effects of coastal erosion. New buildings were often placed too close to the existing shoreline so that

Seawalls: Starting off with the most obvious one on the list, seawalls can be a delicate environmental problem for your home. Even if your home isn't build directly on the wall, the cracking of it can have far-reaching effects. Once the wall

The coastline is also exposed to strong North/North-East winds, which co-enside with a rather generous fetch. Destructive waves are a result, which erode the beaches and attack the foot of the cliffs, removing masses of clay in suspension, resulting in strong marine erosion. The material eroded and transported elsewhere results in little material left to form beaches, which act as a barrier to protect the cliff line from tides, currents and storms, therefore the sea's processed are able to keep cutting back the cliff line.