spurn head what is this and what might have caused it?
TRANSCRIPT
TOPS Top 10 Geography in conjunction with www.sln.org.uk/geography
Spurn Head
What is this and what might have caused it?
TOPS Top 10 Geography in conjunction with www.sln.org.uk/geography
Here is one clue
TOPS Top 10 Geography in conjunction with www.sln.org.uk/geography
Here is another clue
TOPS Top 10 Geography in conjunction with www.sln.org.uk/geography
Here is another clue
TOPS Top 10 Geography in conjunction with www.sln.org.uk/geography
Spurn Head• is located on the
Humber Estuary on the East Yorkshire Coast.
• It has a classical shape with a hooked end.
• How long and how wide?
• Why doesn’t it grow over the estuary?
• How did it come to be?
TOPS Top 10 Geography in conjunction with www.sln.org.uk/geography
Erosion of Boulder Clay on the Holderness section of the coast
TOPS Top 10 Geography in conjunction with www.sln.org.uk/geography
When is and isn’t it eroding?
TOPS Top 10 Geography in conjunction with www.sln.org.uk/geography
Sediment in the sea
TOPS Top 10 Geography in conjunction with www.sln.org.uk/geography
Longshore drift• Longshore drift is the
movement of material along the beach in a zig zag pattern.
• The swash approaches at an angle to the beach pushing the sediment with it.
• The backwash pulled by gravity drags the beach material back into the sea where the process repeats.
TOPS Top 10 Geography in conjunction with www.sln.org.uk/geography
Evidence from groynes
TOPS Top 10 Geography in conjunction with www.sln.org.uk/geography
Creation of Spurn Head• For a spit to be
created there needs to be
• longshore drift occurring plus;
• there needs to be shallow and sheltered water and
• lastly a change in the shape in the coast line
TOPS Top 10 Geography in conjunction with www.sln.org.uk/geography
Has it always been a spit?
• Spurn Head is cyclic which means that it goes through a 250 years of creation and destruction.
• But people have built homes along the coast which means it will need protection from erosion.
TOPS Top 10 Geography in conjunction with www.sln.org.uk/geography
How do we protect?
• Spurn head is cyclic which means that it goes through a 250 years of creation and destruction.
• But people have built homes along the coast which means it will need protection from erosion.
TOPS Top 10 Geography in conjunction with www.sln.org.uk/geography
How do we protect?• This is also a form of
protection it is a concrete wall which should stop wave damage but is it effective?
• ‘Hard’ approaches
TOPS Top 10 Geography in conjunction with www.sln.org.uk/geography
How do we protect?• What other
protection could be used?
• ‘Softer’ approaches
TOPS Top 10 Geography in conjunction with www.sln.org.uk/geography
Protect one place
erode another
TOPS Top 10 Geography in conjunction with www.sln.org.uk/geography
SummaryThe main features of deposition are is a very long spit the most noticeable is Spurn Head on the Holderness Coast.
TOPS Top 10 Geography in conjunction with www.sln.org.uk/geography
Make a sketch
• Draw a location and sketch map of Spurn Head and explain how it was formed - a storyboard is a good way of doing it.
TOPS Top 10 Geography in conjunction with www.sln.org.uk/geography
More at• http://www.sln.org.uk/geography/enquiry/we5.htm • http://www.herb.hull.ac.uk/erosion/index.htm• http://atschool.eduweb.co.uk/nelthorp/room8/intra/
geograph/ks3/coasts/coasts.htm• http://atschool.eduweb.co.uk/nelthorp/room8/intra/
geograph/humberside/index.htm• http://www.pml.ac.uk/lois/Education/case.htm • http://www.fortunecity.com/greenfield/ecolodge/25/
index.html
• Thanks to Francine Wilson Jones, Wilnecote High School