What Is Collaroy Beach?

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

Natural disasters are considered harmful in terms of coastal management and can often cause years of work to be wiped out. It can take large amounts of sand from the beach and remove plant life. Collaroy Beach has been a victim of such natural disasters. A large storm back in 1945 caused Collaroy Beach to empty out a large percentage of its sand and damaged many structures. Collaroy Beach’s local council, Warringah Council, has taken action to prevent storm damage in the future. A revetment wall has been established on the sand dunes so waves do not cause as much damage to the dunes behind. Warringah has also purchased properties that were residential and cleared them, so that a storm will not damage as many structures.

The Year 10 geography field trip was an insightful experience into the workings and functioning of metropolitan coastlines here in South Australia. The day consisted of visiting various beaches in Adelaide that were influenced by some form of hard or soft engineering techniques that changed the natural processes of the beaches. What was evident from this trip was how much these beaches have been changed to an extent where it is unlikely that they will ever go back to the way they were prior to human settlement.

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

The suburb of Pyrmont on the shores of Sydney Harbour has been transformed by the processes of urban renewal into a thriving cosmopolitan residential area, an efficient and sophisticated business centre, and a popular recreational and tourist hub. Through my own observation of the Pyrmont area, I have seen how the painstaking urban planning efforts for the area have come to fruition, and a focal point of the Harbour foreshore created as a result of this.

These sand dunes are important to the coastline and should be protected from these natural threats. The dunes are important because it is used as a buffer against wave damages caused by storms, cyclones, king tides, etc. which protects the land behind from salt water intrusions. The dunes also act as a sand storage area to replenish and maintain the beach at times of erosion. “Sand suns also provide a foundation for ecosystems made up of a wide variety of coastal life.” (http://curiosity.discovery.com/question/why-dunes-coastal-areas). Due to the sand dunes being swept away by the cyclones and king tides all the protection that the dunes are providing to the inland is slowly decreasing because of the erosion that the cyclones and king tides cause. The erosion effects the foreshore most out of all the parts of the sand dunes. The foreshore is most affected because it is where the waves are most frequently hitting that part of the sand dunes which means that erosion will occur faster there. Due to the foreshore wearing away, sand from the foredune and interdune will replace the sand that has been washed away which means that the establishments that are on the interdune will begin to sink into the

Throughout history, the coastline of Sandy Bay has been subject to erosion. The areas focussed on in this study are Nutgrove and Long Beach. Erosion was first documented in this area in 1813. Sea level rise and the increase in the frequency and severity of weather events is currently having an impact on the land cover of both Nutgrove and Long Beach and this is erosion is likely to increase as time passes and climate change progresses.

As one of Devon’s oldest seaside resorts near the mouth of the Teign estuary, Teignmouth is the home to many local residences and local tourism businesses. The shoreline flooding and erosion of Teignmouth has a negative impact on people’s life and the landscape of the resort town. The first sea walls built to protect the town in 1867, which was broken down by the strong sea wave and wind, leading to a terrible flooding of the town in 1908 (Environment Agency, 2015). Later, strong sea waves had toppled down the sea wall, and new sea walls were built again. The year of 1969 had witnessed the breakdown of the sea wall again, which made the Devon River Authority to reconstruct the 145-meter-long sea wall and built 7 groynes to maintain a higher beach level in 1972 (Environment Agency, 2015). In later

Furthermore, extraction of building materials such as sand affects coral reefs, mangroves, and hinterland forests, leading to erosion and destruction of habitats. Overbuilding and extensive paving of shorelines can result in destruction of habitats and disruption of land-sea connections such as sea-turtle nesting spots. Coral reefs are especially fragile marine ecosystems and are suffering worldwide from reef-based tourism developments. Evidence suggests a variety of impacts to coastline ecosystems result from shoreline development, increased sediments in the water, trampling by tourists and divers, ship groundings, pollution from sewage, overfishing, and fishing with poisons and explosives that destroy coral

Hervey Bay is a sub-tropical environment located along the east coast of Queensland. It is recognized for containing a variety of ecosystems, including the rocky shores, forests, mangroves, and sand dunes. Each ecosystem experiences hardships due to human interaction and impact, causing an array of issues. These issues have been investigated in depth through on location field data collection, and an array of online and offline literature references.

Since they were built in the early 20th century, there has been a steady increase in beach erosion. In the 1970s, the government issued a project to replenish the beaches by replacing the sand that had been eroded away over time (Fox). In the 1940s seawalls and groins and even some small jetties were built to protect the properties on the beach. By the time new sand was brought to the beach in 1991 to replenish what was eroded, there was hardly anything left. A lot of the seawalls and groins were buried in order to form the new beaches. The cost of this over the years is well into the millions and although replenishing the beaches with sand is helpful now, it is hardly a long term solution (Fox). There are even implications now as they add more sand. The gradual slope of the beaches before erosion and the replenishment of sand is no longer. The adding of sand from other places to these beaches in mass quantities means that the sand forms steep drops into the ocean in relatively shallow water. This can be dangerous for kids and adults alike who are not careful when in the water

The beach has sensitive banks to the conditions of the shoreline and it is possible that the break at North Narrabeen would be at risk. The sea walls risks making the beach too dangerous, particularly the water, but the idea of buying the properties from the owners and creating instead an extended dune system will create a more natural state of the beach, letting natural coastal processes take place

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

Reportedly the tallest single-structured sand dune in North America rises to 470 feet (140 m) high above small lakes. The dunes at Bruneau Dunes State Park are unique in the Western Hemisphere. Other dunes in the Americas form at the edge of a natural basin. The Bruneau dunes form near the center. The basin has acted as a natural trap for over 12,000 years. The dunes may have started with sands from the Bonneville Flood about 15,000 years ago. The prevailing winds blow from the southeast 28 percent of the time and from the northwest 32 percent of the time, keeping the dunes fairly stable. Unlike most dunes, these do not drift

Dynamic equilibrium represents a state of balance within a constantly changing system. For instance, a beach, which is recognised as a material store, is susceptible to inputs and outputs. Constructive waves are typically associated with relatively gentle beach profiles, enabling waves to surge a long way up the beach. Gradually, as more beach material is deposited, the profile steepens, working against the propagation of constructive waves. This encourages the formation of destructive waves which plunge rather than surge. Redistribution of sediment offshore by destructive waves reduces the beach gradient which in turn encourages the waves to become more constructive. This constant action between the type of beach and angle of the wave represents