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Coastal
defence
A wide variety of techniques designed to prevent erosion and flooding are used.
The following are usually referred to as 'hard' defences include:
A number of 'softer' options are also used including:
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Guidance: In considering these approaches a review of their effectiveness
is needed. A number of 'truths'
derived from studies and practical experience in the USA suggest that
in many instances coastal defence structure may be costly and ineffective.
Some of these 'truths' may be tested at Spey
Bay where a variety of approaches to sea defence are being
considered. Saline
lagoons are particularly susceptible and can be inadvertently
damaged by works designed to 'improve' the coastal defence capability
of a beach as happened at Cley-Salthouse
on the North Norfolk coast.
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