Coastal Erosion: Causes and Solutions Essay

Since 1989, the Beachwatch Program has been monitoring the water quality at Sydney's beaches. Beachwatch involves routine water samples being taken at our beaches for testing against key indicators of pollution.

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.

In 2010, BP’s Deepwater Horizon rig exploded, causing millions of barrels of crude oil to be leaked out into the Gulf of Mexico. The extensive oil spill created a lot of pollution and far-reaching effects on the tourism industry. The resultant damage to marine wildlife such as fish will continue to be felt for many years to come. Weeks after the event, and while it was still in progress, the Deep Water Horizon oil spill was being discussed as a disaster that will impact global economies, markets, and mining policies. The potential consequences included structural shifts in energy policy, insurance marketplaces and risk assessment, and financial liabilities to be incurred by BP. The law that affected the operation of BP’s business was the Clean Water Act, which regulates the discharge of pollutants in US’s waters (EPA, 2008). Following the oil spill, regulations have been put in place to regulate oil drilling operations. The Obama administration proposed new regulations on offshore oil and gas drilling. The regulation focused on oil and gas drilling companies to use stronger blowout Preventers that have the capability to close an offshore well in case a drilling breach occurred accidentally.

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 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.

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

Coastal Management in Hastings is effective economically, socially, environmentally and is sustainable for the future.

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

* The sand dunes on the beaches. This area is affected by wind erosion as well as the tides if adequate vegetative cover is not present. The main type of erosion, from the sea, takes the sand from the sand dunes as well as the rest of the beach in a rip. The sand is then pulled out to sea where it forms a sand bar. On calmer days, the sand is brought back to the beach.

period of time have increased the size of the beach. Enviromental organisations have tried there best to limit the amount of man made deveoplment on coastal lads and many schools

Wave cut platforms are another feature of an erosional coastline. Along coastlines with cliff edges that sit about the shore these features are apparent they look like gently sloping areas of landnear the shore just above sea level. (Chambers, 2007) These benches and marine terraces are the product of wave action eroding the rock at the base of the cliff until the cliff cannot support itself on its new foundation and crumbles into the sea. Over time the collapsed land will have much of the smaller debris eroded away and much of the remaining rock or earth will be somewhat smoothed over to create a gentle slope to the water. (Chambers, 2007)

Many communities are suffering due to coastal erosion. One example is the village of Cocodrie, LA in Terrebonne Parish. This village’s small population and its 220 residential and commercial buildings are surrounded by marshes. In Cocodrie, there is no barrier against hurricanes. Local marinas play host to recreational and commercial fishing, and The Louisiana Universities Marine Consortium is located in Cocodrie. This facility of around 100,000 square ft houses laboratories, classrooms, and a research center. Infrastructure that will be affected by coastal erosion includes paved highway, dirt roads, a bridge, water supply systems, and natural gas lines. By 2050, Cocodrie will be surrounded by open water as the marshlands around the village give way to rising sea levels. Another community affected by this issue is Yscloskey, LA in St. Bernard Parish. The most important part of the economy here is fishing, and highways link the parish to New Orleans fishing communities. The Yscloskey area lies outside of the protective levees and is quite vulnerable to storms. Though losses in Yscloskey are not predicted to be as great as those in Cocodrie, a 16 percent loss by 2050 leaves the infrastructure of Yscloskey even more vulnerable (Coast 2050, 1998, p. 64-66). Local residents in these areas are watching the land disappear along with the beachfronts and Cyprus swamps that were on that land (Marshall, 2014).

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

With the huge impact of the oil spill on marine life and coastal regions, fishing and tourism industries of the places affected in the Gulf Coast severely declined. In the fishing industry, the incident led to an approximate $2.5 billion loss, while tourist industries experienced a loss of a predicted $23 billion (Jarvis, 2010). In addition, the moratorium placed on deep water drilling left 58,000 workers unemployed (ibid).