Transcript Lesson plan: Holderness coast

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Making decisions about the
Holderness coast
Michelle Minton
Learning objective: To investigate the impacts of erosion along
the Holderness coast and how this coastline should be
managed
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Starter: Geographical questions
• Look at a map or photograph of an eroded coastline.
• Create a caption which describes what the image shows.
• Ask yourself why has this happened.
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Making decisions about the
Holderness coast
Task 1
Read the article ‘A fresh look at the Holderness Coast’. Complete the case study table below
in your books.
Ulrome
Location and
current rate of
erosion
Population size
Economic value
(e.g. businesses)
Coastal
management to
date
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Hornsea
Making decisions about the
Holderness coast
Task 2
As the article explains, in 2105 local authorities will have to decide again how to protect the
Holderness coast. In pairs, critically evaluate the current management strategies in Hornsea
or Ulrome and make suggestions for coastal management of these locations in the future.
Read the information about the location you are focusing on carefully and complete a cost–
benefit analysis of the current management strategy used in this area.
Hornsea (Hold the
line)
Ulrome – No active
intervention
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Costs
Benefits
(social, economic and
environmental)
(social, economic and
environmental)
Hornsea
• The management strategy currently applied here is hold the line. Investment
has been made to protect Hornsea from erosion and flooding.
• Wooden groynes trap sediment being transported by longshore drift. This
widens the beach, absorbing wave energy and protecting the land behind. They
are inexpensive, but need regular repairs. Groynes also restrict beach access
and can increase erosion further down the coastline.
• Hornsea’s sea wall offers protection against flooding and erosion. It is a large
concrete structure which is expensive and energy consumptive to build.
However, it does create a promenade for local people and tourists to enjoy.
• Rock armour comprises large granite boulders which are usually imported from
abroad, making them more expensive than groynes. When placed in front of a
sea wall they absorb wave energy helping to protect the wall behind. The
natural materials used reduce visual pollution.
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Ulrome
• The management strategy currently applied here is no active intervention (do
nothing). The local authority has decided not to protect Ulrome.
• The installation of groynes in Hornsea has accelerated erosion in Ulrome.
Groynes in Hornsea trap sediment which would naturally be transported by
longshore drift and deposited at Ulrome, creating a wider beach. A wider beach
absorbs wave energy, protecting the cliffs behind from erosion.
• The homes of 200 residents in Ulrome are under threat. Without protection,
boulder clay cliffs will continue to erode and the coastline will retreat. Local
farmers and holiday-park owners in this area are also facing the loss of their
businesses and livelihoods.
• Demolition of property in this area has cost in excess of £100,000. As it stands
local businesses and residents will have to relocate. However, this is less than the
cost of strong and effective coastal-management strategies, saving the local
authority money.
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Making decisions about the
Holderness coast
Task 2 (continued)
Now join with a pair who have researched the other location. You should discuss each
location’s cost–benefit analysis and, bearing in mind the two future predictions below, decide
upon how Hornsea and Ulrome should be managed in the future.
Future predictions
•
Sea-level rise of at least 2 metres
•
Increased risk of storm surges
Options for future management
•
No active intervention
•
Hold the line
•
Managed realignment
•
Advance the line
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Tip: Consider a
variety of
stakeholders in
your decision
Literacy support
Point: What strategy have you chosen?
Evidence: What facts/figures support your
choice?
Analyse: Why have you made this decision?
Link: Link this decision with the other case
study location’s decision. Why do they differ?
Plenary
When deciding on how to manage a coastline social, economic and environmental
implications have to be taken into account. Imagine a large triangle in your classroom and
stand to show how much each factor should be taken into account. Be prepared to explain
your opinion.
Social
Economic
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Environmental