Erosion of Shorelines Essays

Beach nourishment is used in both Cronulla and Collaroy but the sand is sourced from different areas. Sand is dredged from the Port Hacking River for Cronulla while Collaroy receives its sand from the Narrabeen Lagoon. Both are effective areas because the sand that is dredged prevents blockages in the river mouths and allows ships to pass through.

Sand nourishment refers to the replacement of sediment on beaches that has previously been lost, generally through natural processes. It is a commonly used practice in coastal management. Collaroy Beach uses sand nourishment as longshore drift has moved sand, which cannot be replenished as there are rock formations preventing sediment from refilling the beach. Collaroy Beach also does not have an established dune system, and cannot trap sand.

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

At Nudgee Beach, erosion was found to have occurred on the edges of the mangrove forest and along the mudflat shorelines. Erosion is typically influenced by natural factors and occurs when pieces of weathered rock or soil are moved – typically by wind and water – from one place to another. Shorelines with lots of sediment and sand are more inclined to be effected by erosional progression. Erosion may also be provoked and accelerated by human interference. For example, if the decision to clear trees and plants from an area is made, erosion is likely to occur as the root systems of plants work to hold the soil in place. If these root systems are removed and erosion does occur, environmental conditions – such as; landslides and flooding – are more likely to take place. Erosion may also cause other plants to tip over, have their underground roots exposed and damaged and contribute to the pollution of local waters; as a result of mud and soil runoff [26]. Erosion at Nudgee Beach was likely to have been influenced by natural factors; however, the development and extension of the Kedron Brook golfing course may contribute to the acceleration of erosional processes and further damage the mangrove

Longshore drift is movement of sediment along the coastline. The prevailing wind blows waves carrying sediment into the beach at an angle, the waves break on the shore and as the water runs back into the sea it carries the sediment back down the beach, perpendicular to the angle. This will lead to a zigzag motion (/\/\/\/\/) as

sand being deposited upon it. The only reason why beaches shrink is due to erosion and this

In the Bennet et al. (2009) paper ontained nine GPR transverses at three different sites to obtain the evolution of Chesil Beach. The three different sites were Abbotsbury, Langton Herring, and Ferry Bridge. Through each of these GPR transveres, there is a lot of consistency to be seen of the internal structure of Chesil Beach. It was noted that the first phase had a landward transgression of small sand and gravel beach which crept upon the beach which lead to the accumulation of freshwater peat. This occurred between 7-5 k yr BP. The second phase involved the ‘“bulking out” of the beach’ when the sea

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

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.

Long Island is famous for its sandy ocean beaches. Between the barrier beach and the main coast is the Great South Bay. The beaches and dunes have very different characteristics. The sandy beach is the junction of land and ocean. The sandy beach consists of two zones, the swash zone and the drift line. The swash zone is the area of wet sand, caused by the incoming wave. The drift line is formed by the dead seaweed and other aquatic plants. Behind the sandy beach is the primary dune. The primary dune's main function is to absorb the force of the ocean and protect the great south bay and the island's main coast. In some cases secondary dunes form. These dunes are behind the primary dune and are therefor protected from the ocean. This provides the stability necessary for plant growth. Many time a maritime forests will form on secondary dunes.

A big problem in Cape Cod is beach erosion. The first reason why the beaches are eroding is because of rock jetties. Rock jetties that separate beaches interrupt the natural transfer of sand by the tides and wind. The

Coastal Erosion is a natural process that takes place along the nation’s coast causing a loss of sediments in some places and deposits in others.3

 NSW Environment & Heritage. (2018). Coastal management framework. [online] Available at: http://www.environment.nsw.gov.au/topics/water/coasts/coastal-management/coastal-management-framework [Accessed 22 May

The intertidal rocky shore of Caloundra Beach is inhabited by diverse range of biodiversity of animals and plants, many of which have developed high levels of adaptations throughout their existence. The very boundary of marine and terrestrial ecosystem, this environment is subjected to extremes of the physical environment such as temperature, desiccation, wave turbulence as well the ecological interactions that commonly occur in biotic communities (e.g. competition, predation). However Rocky intertidal shores are easily accessible by humans and provide an enjoyable opportunity for passive recreation and for science and environmental education as well.

Currents under the sea play an important role in the formation of a coastline. Currents may be generated by density differences in water masses caused by temperature and salinity variations (NOAA, 2013). These currents move large water masses through deep ocean taking nutrients, oxygen, and heat with them (NOAA, 2013). However, some currents are affected by other variables such as huge storms that move water masses, underwater earthquakes that may also trigger tsunamis (NOAA, 2013). Both types of variables move masses of water inland