In addition to the clay being vulnerable to erosion, it is also prone to slumping. The construction of the rock groynes has created a larger, higher sandy beach for Mappleton. The land use to the south of Mappleton is predominantly agricultural. Generally, the natural beaches of Holderness are almost always narrow and unable to stop wave erosion. Open this Word document and complete all of the tasks using the Google map below ; Find out more about coastal erosion at this excellent website.
It extends 61km from Flamborough in the north to Spurn Point in the south. The Holderness Coast is the most rapidly eroding coastline in Europe. The processes of erosion and weathering occurring are numerous but include hydraulic action, freeze thaw, abrasion, solution and carbonation on the clay. The first is the result of the strong prevailing winds creating longshore drift that moves material south along the coastline. Coastal management at Hornsea and Withernsea are examples of hard engineering solutions to coastal erosion. This is evident in the image below. Cliff stabilisation has had a positive impact in managing the threat of mass movement.
Vegetation was planted on the cliffs to further stabilise them from mass movement. They have been successful in restricting waves from attacking the base of the cliffs here.
Longshore drift no longer transports materials along this section of the coast.
There are two main reasons why this area of coast is eroding so rapidly. In order to protect the cliffs along the front of Mappleton from undercutting, their gradient was also reduced artificially.
However, in most place this is covered by glacial till deposited over 18, years ago. Waves during normally occurring storm events can reach up to 4 m.
The Holderness Coastline is in the North of England and runs between the Humber Estuary in the south and a headland at Flamborough head. Geology The geology runs in bands, with a chalk layer at Flamborough in the North, Boulder clay or till laid down in coasr last ice age south of that and finally river deposits in the Humber Estuary.
The area contains ‘text book’ examples of coastal erosion and deposition. In addition to the clay being vulnerable to erosion, it is also prone to slumping. So, blocks of granite were brought in and placed along the cliff base and 2 rock groynes were put into place to trap sediment moving because of longshore drift.
As the result of the coastal scheme at Mappleton no properties have been lost to the sea and the B remains safe from the risk of erosion. The coastline consists of low glacial till boulder clay.
Because the clay is an unconsolidated WEAK mass of clay particles and boulders it erodes more rapidly than the more resistant rock of chalk in the north.
Tidal range at the Holderness coast is very high and can reach up to 7 m. Beaches along the coast comprise mainly of shingle and sand eroded from the clay till. This means that even at high tide waves do not reach the base of the cliffs along the seafront at Mappleton and the erosion has slowed to a point where it is no longer a threat to the settlement.
The processes of erosion and weathering occurring are numerous but include hydraulic action, freeze thaw, abrasion, solution and carbonation on the clay.
Landform Case Study: Holderness Coast Flashcards Preview
The Holderness Coast is located on the east coast of England. Notice the impact of erosion to the south of the coastal defences. The second is that the cliffs are made of soft boulder clay which erodes rapidly when saturated. It has the unenviable reputation as the number one place in Europe for coastal erosion, and in a stormy year waves from the North sea can remove between 7 and 10m of coastline.
Coastal management – Revision 3 – GCSE Geography – BBC Bitesize
However some defences have been attempted. The seabed consists of the glacial mud, sands and boulders, as do the cliffs. Mappleton is located on the Holderness Coast of East Yorkshire.
This is because water enters cracks and pore spaces in the rock, adding weight and making it slump. Coasts menu Where do you want to go now?
The Holderness Coast Case Study – Internet Geography
This is evident in the image below. Take a look at our new resources in the shop Dismiss. View the coasts menu. These large granite boulders were imported from Scandinavia and deposited by barge along the coast. Online Activities [Online activities]: Although the coastal defences have had a positive impact in terms of reducing the rate of erosion and protecting the village and main road, the area directly south of the village now suffers from an even greater rate of erosion.
The construction of the rock groynes has created a larger, higher sandy beach for Mappleton. If you’ve found the resources on this site useful please consider making a secure donation via PayPal to support the development of the site.