Coasts EQ3 Flashcards
Give a place example of an area experiencing rapid coastal erosion in the UK.
The Holderness coastline, the fastest encoding coast in Europe
At what rate is the Holderness coastline eroding?
2m a year on average. Some places eroding at 4m per year
How many homes in Holderness will fall into the sea by 2100?
200 homes
The EA suggests 7000 homes will disappear nationally due to coastal erosion.
What conditions make Holderness vulnerable to wave action?
Deep water of the coast allows for waves to approach at higher speeds.
A large fetch reaching across Atlantic and north sea can be as long as 5000km- providing waves with more energy.
Low pressure system- causes intense winds and high tides
How does the geology of Holderness make it vulnerable to coastal erosion?
The coast is made up of unconsolidated glacial till vulnerable to freeze thaw and alternating cycles of wetting and drying caused crumbly dry periods. Can also cause slumping.
Made of boulder clay- easily eroded
How do the beaches at Holderness influence coastal erosion?
Beaches are main issue, made of clay so easily transported/eroded.
The beaches are narrow= little friction, poorly protecting the cliff from waves. Vulnerable to long shore drift
How has human interference impacted the coastal erosion in Holderness?
Coastal defences placed in Hornsea (North holderness) have disrupted sediment cell equilibrium (terminal ground syndrome)
Give a place example of an area experiencing rapid coastal erosion (not in the UK)?
The Nile Delta
What is the Aswan High Damn what what impact did it have on river discharge?
Built in 1960 The High Dam was built across the Nile in Egypt.
causing river discharge to fall from 35billion cubic metres a year to 10billion.
Describe how erosion rates have changed at Rosetta/ the Nile Delta.
Erosion rates at rosetta have increased from 25m to 200m/year
Describe how human activities in Mauritania have impacted coastal erosion?
