Holderness+Case+Study

[|CASECASE STUDY FOR COASTS - HOLDERNESS COASTLINE EAST YORKSHIRE]

Mappleton

Location

Situated approximately 3km south of Hornsea lies the village of Mappleton. Supporting approximately 50 properties, the village has been subject to intense erosion at a rate of 2.0m per year, resulting in the access road being only 50m from the cliff edge at its closest point.

Geology

Mappleton lies upon unconsolidated till. This material was deposited by glaciers during the last ice age 18,000 years ago.

Coastal Features

The two rock groynes at Mappleton have helped develop wide and steep sandy beaches.

Coastal Management

In 1991 two rock groynes and a rock revetment were built, as a consequence a substantial beach accumulated between the groynes halting erosion. However, further south the rate of erosion has increased significantly. This is because material which is being carried south is not being replaced (it is trapped within the groynes). Therefore there is no beach to protect the cliffs. Even during a neap tide ( a tide which is 30% less than the average tidal range) the sea reaches the base of the soft cliffs and erosion occurs