Coastal Erosion At Dunwich
This question is asking for the reasons as to why the coastal erosion
at Dunwich takes place. I have already shown that there is coastal
erosion in question one, and now I am going to explain why this
erosion happens. To show how the erosion takes place, I will look at
many different factors: wave type, long shore drift, the geology in
the area, and beach profile.
Natural Erosion
Fig 2.2 on page 3 shows the sand martins nests, which are a
contributing factor to the erosion of Dunwich Cliffs. They make their
nests by digging the soft cliff material out with their feet to make a
tunnel like formation into the cliff. It is this removal of the beach
material that constitutes to coastal erosion.
Waves
Text Box: We measured the waves in order to see whether they were
constructive or destructive.
Text Box: Fig 3.1To work out this result, we had to take the
information in two different ways: firstly to work out what type of
waves there were, one person from our group had to go into the water
with a ranging pole. The pole was then fixed into the seabed and then
we counted how many waves passed that fixed point in five minutes (fig
3.1). We counted 100 waves in the five minutes, and this works out as
20 waves per minute (wave frequency). As a general rule, if there are
more than 13 waves a minute, then the waves are destructive. With 20
waves a minute, I thought that these were destructive waves. After
this, we counted the time it took for eleven waves to pass the fixed
point (wave period), five times, in order to calculate an average.
Text Box:
Wave Period
Wave set number
Time for eleven waves
Time for eleven waves divided by ten
1
49.5
4.95
2
47.13
4.713
3
49.7
4.97
In Roman times St. Mary's Church was built with Twin Towers as part of the building. Originally the church was 3kms away from the sea but as the cliff was eroded it eventually became next to the see. There was a danger the cliff under the Twin Towers and therefore the Twin Towers themselves would be destroyed by erosion. To stop this happening many coastal defences and different types of management have been erected. The initial try at coastal management was in 1809.
Birling Gap has quite a lot of history to it, a long long time ago it
The Reasons for Aldeburgh Being Protected Differently than Dunwich In this question, I will be looking at how Aldeburgh is protected more than Dunwich, and the reasons why. I will concentrate more on the reasons, and to answer this, I will look at the location, long shore drift, and nearby places. Types of Coastal Protection Dunwich is only 9 miles north of Aldeburgh, but the methods of coastal protection in these two places are very different. In Dunwich there is a small amount of 'soft' protection. This means that natural methods are used.
Investigating if Dawlish Warren is Under Threat of Human Impact My investigation aims to find out if Dawlish Warren is threaten by human impacts and marine processes and are these affecting the ecological and economical value of Dawlish Warren. I will put to test Butlers Model and see if it applies to Dawlish Warren. I will also look at the other side of the argument and see the effect of management in Dawlish Warren and look at the sea defences which have been put in place to prevent erosion and longshore drift from occurring and also protecting the Railway line.
Case Study of Hastings Coastal Management Hastings is a town on the south coast of England approximately 60 miles south of London (see map below). In recent years, the coastline at Hastings has had to face many large scale problems, including the 10 km stretch from Hastings eastwards to the small town of Fairlight. With the coastline at constant exposure to the English Channel, there are many coastal processes which take place along the stretch of beach and cliff. [IMAGE][IMAGE] [IMAGE][IMAGE] Longshore Drift [IMAGE] Fetch [IMAGE]The map on the left illustrates the location of Hastings and also the area of the coastline which is being discussed in this case study.
There are many different types of coasts that exist throughout the United States. The south shore of Long Island has a unique types of coast known as a barrier beach. Barrier beaches are long narrow land forms that are composed of sand and other lose sediments. These sediments are brought together by the actions of waves, currents and storm surges. Barrier beaches are subject to constant changes by the same forces. Sand is constantly eroded in one area an deposited in another. Barrier coasts are important for a number of reasons; they protect the mainland of Long Island from the open ocean and flooding during storms, for recreational use and the unique ecosystems which exist on barrier beaches.
Longshore drift influences the deposition and erosion of sediments. Waves erode the coast and transport the eroded material along the coastline. Over a period of time, the material will be deposited on a beach or form a larger feature such as a spit. Groynes are structures built at equal intervals along the coastline. Their purpose is to restrict longshore drift, preventing coastal erosion.
Coastal erosion is a growing problem along the Gulf Coast. Louisiana is one of the coastal states most affected by coastal erosion. Ninety percent of wetland loss in the nation occurs in Louisiana, losing 25-35 square miles per year. At that rate, Louisiana will lose 640,000 more acres by 2050. Many factors contribute to this land loss, such as rising sea levels, subsidence, hurricane storm surge, cold fronts, and human interference. Cold fronts and hurricanes can both have detrimental consequences on the coast of Louisiana (Zhang 2004) (Restore or Retreat 2012). This research shows whether cold fronts or hurricanes have a larger effect on coastal erosion. The researcher will describe how historical and current satellite imagery help in determining the changes in the Louisiana coast. Based on previous research, the researcher believes that hurricanes have more of an effect on coastal erosion than cold fronts due to the high winds and storm surge.
Increased sea levels can give way to a variety of problems: rapid coastal erosion, shoreline change, loss of natural protective barriers, saltwater intrusion into aquifers and surface water, changes in tidal prisms (volume of water in an inlet between high tide and low tide), and rising water tables ("Climate Change and Impacts of Sea Level Rise"). Ventura County is facing many issues with rapid coastal erosion and loss of natural protective barriers. Beach Erosion Authority for Clean Oceans and Nourishment (BEACON) conducted a study to evaluate the conditions of different beaches along the Ventura County coast (Barlow, "Coastal Erosion Problems Highlighted in New Study"). Port Hueneme’s western beaches (picture to the left) are losing three to five inches per month due to sea level rise pushing beaches farther back.
Surfers, swimmers and sunbathers use beaches for recreation. People fish off beaches for food. Since many people take their vacations at the beach, lots of beaches in tropical locations are important to their country’s economy. Entire cities, regions and countries depend on the money tourists spend while visiting the beach. Beaches are naturally very dynamic places, but people try to control them and build permanent structures, such as houses, restaurants, shops and hotels, on or near the shore. The natural erosion and deposition of beaches becomes a problem. Beaches con disappear over time, or even over night during severe storms. Beaches are areas of loose sediment (sand, gravel, cobbles) controlled by ocean processes. Most beaches have several characteristic features. First are offshore bars, which help protect beaches from erosion. Next is the foreshore, which rises from the water toward the crest of the next feature; a berm. On low-lying shores, dunes form behind beaches. Dunes look like rolling hills of sand and are blown into place by the wind. New, smaller dunes are often changing shape as the wind continues to affect them. Waves and currents move the accumulated sediment constantly creating, eroding and changing the coastlines.
This paper introduces the environmental concerns of the loss of coastal wetlands. The paper will discuss the significance of wetlands and the devastation that is occurring because of human activity. Wetlands are an essential element of our environment both ecological and societal; conservation will be essential for the preservation of these precious ecosystems.
The question that I will be answering for my coursework is which is best at protecting the Northumberland coastline – groynes or beach nourishment. I will be going to Blyth beach also I will be visiting Newbiggen beach I am investigating the Northumberland coastline as part of my geography coursework also because I live in the UK and I want to see how safe the people of the UK are with the safety of the coastline and its defences against coastal erosion. We will be visiting the Northumberland coastline on Thursday the 15th of May 2014.
eroded as fast as 6 metres per year, but the average is 1.8 metres per
An Analysis of Dover Beach Dover Beach intrigued me as soon as I read the title. I have a great love of beaches, so I feel a connection with the speaker as he or she stands on the cliffs of Dover, looking out at the sea and reflecting on life. Arnold successfully captures the mystical beauty of the ocean as it echoes human existence and the struggles of life. The moods of the speaker throughout the poem change dramatically, as do the moods of the sea. The irregular, undesirable rhyme is representative of these inharmonious moods and struggles.
People from all over the world go to beautiful beaches that are filled with water as clear as ice or as beautiful as diamonds. But, what will happen if we do not conserve the appealing sites that draw attraction to the public? Contaminated beaches has become a controversial issue to the public because of the causal problem, the harm to the people and marine animals, the government agencies supporting or opposing pollution, and the industries involved in creating such unlawful decisions. To create and find a solution, we must first find the core to the problem.