Halcrow, Coastal Studies Forward Programme Data Compilation ...

7060Short term 2002-2009 (n = 132)Medium term 1941-2002 (n = 102)Long term 1863-2002 (n = 113)50Frequency403020100-5.0 to -4.0-4.0 to -3.0-3.0 to -2.0-2.0 to -1.0-1.0 to -0.8-0.8 to -0.6-0.6 to -0.4-0.4 to -0.2-0.2 to 00 to 0.20.2 to 0.40.4 to 0.60.6 to 0.80.8 to 1.01 to 22 to 33 to 44 to 5Rate of change (m/yr)Figure 3.1. Summary of coastal change data (1863 to 2009)The key findings of all the coastal monitoring and inspections can be summarisedas follows:In the north of the area of interest, the cliffs formed of weak till at St BeesGolf Course have been subject to erosion since 2002 at a rate of up to0.8m/yr, and on average by 0.42m/yr, due to on-going cliff instability(mudsliding) where debris is rapidly incorporated into the beach system.The foreshore in this area has experienced no significant net change involume, although the beach and foreshore morphology changesdynamically due to movement of sand bars.In the section from Pow Beck to the Ehen Valley, the foreshore ispredominantly a gravel shore platform which does not appear to haveDoc No 1 Rev 2: Date: May 2010 28