Dear Mr Hutchinson

 

 

Thank you for your recent information enquiry regarding Thurstaston
cliffs.  We can respond to your questions as follows:

 

In your regular surveys of Thurstaston cliffs and others and the beaches
of Wirral has WMBC seen in the record any changes that might cause
concern?

The behaviour of the cliffs is influenced by tides and waves affectng the
toe and run off affecting the cliff surface.  Thurstaston cliffs are
identified as “Simple Cliffs” with change primarily due to Topples and
Falls, Rotational Landsides or Mud slides. Examination of aerial
photographs since the 1970s has identified non-uniform setback of both the
cliff top and toe line.  

 

What is the current rate of rise of mean sea-level hereabouts?

The Proudman Oceanographic Laboratory Report 112 (June 1997) identified a
trend in the rise of mean sea level of approximately 3mm per year during
the 20^th century.  The latest Climate Change Data (UKCP18) identifies a
rate of change of 5mm per annum for the last 13 years.

 

What is the current rate of erosion at Thurstaston?

The long term rate of movement of the toe averages out over the last 50
years at 0.3-0.5m per annum.

 

Is the rate of erosion of the cliffs at Thurstaston increasing?

The rate of movement of the toe over the last 10 years is between 0.0 and
0.7m per annum.

 

We trust this information is of interest to you.

 

Yours sincerely

 

 

Lynette Paterson

Principal Information Management Officer

Wirral Council

PO Box 290
Brighton Street
Wallasey
CH27 9FQ

 

Email: [1][Wirral Borough Council request email]

 

Visit our website: [2]www.wirral.gov.uk

 

 

 

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References

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1. mailto:[Wirral Borough Council request email]
2. http://www.wirral.gov.uk/