Coastal Processes and Landforms Constructive Waves - Swell or surging waves created by distant storms (low frequency (6-8/minute); long wavelength (up to 100m); low flatter waves (<1m); low energy and stronger swash than backwash Destructive Waves - Storm or plunging waves created by local winds / storms (high frequency (10-12/minute); short wavelength (<20m); high steep wave (>1m); high energy and backwash stronger than swash Fetch - the distance over which wind has blown (i.e. distance
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I am writing today to discuss the issue of coastal erosion and the proposed solution of beach nourishment. Coastal erosion has several causes‚ the most prominent being the breaking of waves against the coastline. While seemingly harmless‚ over time waves break away at the shoreline‚ leading to its reduction. Beaches are the one thing that protect coastal structures from such damage. They act as a line of defense for everything they surround‚ and are necessary for communities to thrive along the coast
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operation and integration of natural processes within your chosen New Zealand geographic environment have led to the formation of one significant feature. New Zealand geographic environment – Muriwai Coastal Environment Feature – Sand dunes situated at the back of Muriwai beach Introduction Muriwai Coastal Environment is located on the west coast of the North Island. It is located west of Auckland‚ midway between the entrances to the he Manukau and Kaipara Harbour. It is located between Woodhill Forest
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three key factors in the geographical processes that affect the coastal enviroments. There are erosion‚ deposition and transportation. The beaches are affected bytransportation or more commonly known as longshore drift (Longshore drift is the movement of sediments‚ usually sand‚ along a coast parallel to the shoreline) The use of a tomobolo could help with trapping the sand to minimize the damage of longshore drift to beaches. Coastal areas usually have sand dunes on beaches to act as a source
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Head is a scenic and historic headland near the town of Bournemouth on the south coast of England. It stands mid-way between Poole harbour and Hurst spit and forms the main division between Poole and Christchurch Bays. Coastal Processes | Description | Sub Aerial | Coastal erosional processes that are not linked to the action of the sea. Erosion occurs via rain‚ weathering by wind and frost. Its impact is often seen in soil creep‚ slumping and landslides. | Corrosion | When waves approach
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Levardis Smith Katherine Luce LR10 – Intro to Library Research 16 November 2010 Coastal Erosion: Causes and Solutions More than half the world’s population lives in coastal regions‚ and many people visit the coast frequently. Most come for seaside recreation‚ but some also wonder about the origins of coastal scenery. From the United States to Australia to the UK and back‚ our coastlines are disappearing and we have been trying to stop it. Up and down the United States coastline‚ residents
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1. Why is Mappleton threatened by coastal erosion? The plain of Holderness did not exist before the Ice Age. It was once a wide bay backed by chalk cliffs running from Flamborough Head to Hessle‚ west of the city of Hull. Today Holderness is made up of glacial tills – sands and clays deposited by ice sheets during the Ice Age (Figure 4). The tills are soft and unstable and have little resistance to erosion. The low cliffs repeatedly slump down along rotational slip planes‚ lubricated by water which
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Factors affecting the rate of coastal erosion Rock types - Soft rocks like clay or mud‚ erode faster than hard rocks like granite. This is because hard rocks are more resistant to erosion. This means that the hard rock is left sticking out into the sea as a headland. The headland is now vulnerable to the force of destructive waves but shelters the bays close by from further erosion. Wave type - Destructive waves cause more erosion than constructive waves. This is because backwash is more powerful
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Saji Begum With reference to one or more located coastlines‚ examine the factors responsible for landforms of coastal erosion. (25 marker) Most of our landforms on the coastline are formed because of coastal erosion. But firstly it is essential to understand what coastal erosions are. Coastal erosion involves the breaking down and removal of material along a coastline by the movement of wind & water. They are sorted in two categories‚ Marine processes and Sub aerial processes. A few methods of erosion
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Technique Equipment Description Justification (Why we did it – what would the results tell us?) Infiltration rate • Single ring Infiltrometer • Ruler • Water • Hammer • Measuring Tape • Stopwatch • Bucket First‚ a measuring tape was placed down along the 15m beach transect. Every 5 meter/15cm in diameter was hammered in to the wave cut platform. A bucket of water was then collected from the beach and poured into a 20cm high single-ring infiltrometer. We timed (with a stopwatch) how much
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