Introduction
Issue
Coastal erosion can be defined as the permanent loss of sand from a beach dune system and can be caused by both natural and human-based influences. It is of an ever-growing global significance in coastal regions as it is associated with loss of housing, infrastructure and ecosystems protecting biodiversity. Coastal erosion is therefore interconnected to deposition and pollution.
Aim
To evaluate the management Collaroy/Narrabeen by the Northern Beaches council against Clifton Hawkes Bay.
Focus Questions
What methods are currently used to manage erosion in the coastal areas of Collaroy/Narrabeen?
What is the coastal management program of Clifton Hawkes Bay
What are the opinions of local residents in regard to managing erosion
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50 metres have been eroded from the beaches due to huge waves and king tides, damaging waterfront properties, inundating businesses and flooding inland areas.
Figure 2 Narrabeen & Collaroy Map Source: ResearchGate
Methodology
Photos
Photographic evidence was recorded using a phone to record the extent of damages caused by coastal erosion and management strategies currently implemented at Narrabeen/Collaroy. This includes evidence of damage on various waterfront property and the coastline exploring the negative impact of erosion caused by destructive waves and king tides.
Survey (see appendix a)
A survey was conducted consisting of 10 questions regarding erosion, targeting the residents of the Northern Beaches Council. The survey was distributed online, through social media such as Facebook and email. 15 responses were given, however 3 were considered invalid due to the fact that they did not reside In the Northern Beaches Council area.
Information from the Coastal Environmental Centre
Information was collected throughout a visit to the Coastal Environmental Centre such as measurements and observations. Different factors regarding the atmosphere and hydrosphere in the area were recorded in order to understand the process of longshore drift and
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The management strategies implemented in Hawke's Bay after this devastating incident consisted of hard engineering as well as managed retreat.
Figure 3 Damage to waterfront property Source: tonkinntaylor
The Seawall
Hard engineering as a form of coastal management involves structures along the coastline, aiming to dissipate wave energy or trap sand to widen the beach. This form of coastal protection works towards protecting the land and the structural development behind it. Hard engineering is a more environment-based change. The Hawke's Bay Regional Council has erected a seawall, designed mainly to resist wave action and create a physical barrier between the sea and land. It is constructed from concrete and stone and is stepped (figures 5 & 6).
Figure 5 Stepped, recurved seawall Source: MarkedByTeachers.
Managed Retreat
Managed retreat offers a more human-based change, allowing coastal processes to behave naturally. The council has commenced a managed retreat plan aiming to run over the next 50-100 years, allowing the course of nature to slowly revert back to its natural process. The cost of managed retreat costs $4.3m to
Investigation on Coastal Erosion In Porlock Bay Aims ---- Aim 1: To find out if beach material is moved across Porlock Bay by longshore drift. Aim 2: To find out which type of sea defense is best for Porlock bay. If L.S.D. (long shore drift) were taking place I would expect to find: a) Deposition at one end of the bay and against any abstractions such as groynes. b)
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See Location Map of the coastline being studied from Herne Bay to Reculver.
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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.
North Sea to the east. Part of the Naze is made up of a hill, which
Longshore drift is a process by which sediments are transported from one place to another. When this process occurs, beaches, spits and sandbars are accreted over time. If the process of longshore drift is altered by factors such as stronger winds and stronger currents, beach erosion begins at a faster rate and this may result in many serious problems. The main stakeholders of longshore drift are resort owners. They rely on people to visit their resorts and enjoy the beach. However, if longshore drift erodes t...
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.
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.
On page 1 of Peter Moskos’ investigative novel, Cop in the Hood; Moskos writes, “At a police funeral no one composes eulogizing platitudes of ‘never again.” In short, the public has grown callous to the death of a policeman. It goes unnoticed and unavenged. Given the recent events in Charlottesville in which Heather Heyer was tragically killed and made into a martyr for equal justice, I thought Moskos’ observation was misinformed. It seemed as if the entire nation had composed eulogizing platitudes of never again in the wake of Heyer’s death. Her death was noticed and is soon to be avenged with public outcry for her assailant to see maximum sentencing. What makes Heyer’s death so different from that of a policeman killed in action? Both are symbols of the active pursuit of justice so why did the nation favor one and not the other?
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Coastal Erosion is a process at Muriwai that gradually wears away the rock particles of the earth's surface, transporting them to another location. There are many types of processes that cause erosion at Muriwai such as wave erosion, wind erosion and wave refraction.
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