Holderness- Coastal Erosion Flashcards Preview

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Flashcards in Holderness- Coastal Erosion Deck (7):
1

The average rate of erosion at Holderness

1.8 m

2

How long is the Holderness coast?

61 km

3

The rate of erosion in Great Cowden

10m/year

4

The main reasons for rapid erosion of the Holderness

-The cliffs are made up of till or boulder clays. Easily eroded through corrasion and slumping when wet
-Narrow beaches allow more erosion as less erosive power is absorbed. Flamborough head stops sediment heading north replenishing the Beaches along the Holderness. Made of chalk which dissolves when eroded rather than making new beaches.
-Coastal defences at Mappleton lead to narrow beaches
-Powerful waves due to the long fetch from the Arctic Ocean/dominant wind and wave direction from north-east

5

Environmental impacts of erosion

-SSSI are threatened e.g. The Lagoons near Easington, colony of 1% of the British breeding population of little terns.Separated from the sea by a narrow strip of sand and shingle. Erosion would connect the lake to the the sea and destroy the lagoon.

6

Social impacts of erosion

-property prices along coast fallen dramatically
-30 villages lost since Roman times

7

Economic impacts of erosion

-visitor number dropped by over 30% between 1998 and 2006
-Caravan park in Ulrome losing 10 pitches a year
-£2 million spent at Mappleton to protect the coast
-Gas terminal at Easington at risk. Supplies 25% of Britains gas supply.