Table 1.

Table of cliff recession derived from selected TLS surveys, September 2001 to November 2017. (BGS©UKRI)

Increm.Cumul.Increm.Cumul.Cumul.Increm.Cumul.Cumul.12 mnthMean
timetimelosslossloss/mlosslossloss/mincr. lossrecess.
Period/100 m/100 m/100 m/100 m/100 mrate
Datestartend(days)(days)(m3)(m3)(m3)(tonnes)(tonnes)(tonnes)(m3)(m/yr.)
01-09-2001Sep-01000
18-04-2002Sep-01Apr-0222922917001700173570357036
18-09-2002Apr-02Sep-02165394800250025168052505325001.5
10-10-2003Sep-02Sep-033757691500400040315084008415000.9
07-04-2004Sep-03Apr-041809493100710071651014910149
19-08-2004Apr-04Aug-04134108370078007814701638016438002.4
18-09-2005Aug-04Sep-053951478680014600146142803066030762773.4
06-09-2006Sep-05Sep-06353183131001770017765103717037231001.8
30-08-2007Sep-06Aug-07358218912001890018925203969039712000.8
28-04-2009Aug-07Apr-096072796720026100261151205481054843201.5
22-10-2009Apr-09Oct-091772973320029300293672061530615
03-03-2010Oct-09Mar-10132310519003120031239906552065551003.3
27-07-2010Mar-10Jul-101463251190033100331399069510695
08-02-2011Jul-10Feb-11196344711003420034223107182071830001.9
22-03-2012Feb-11Mar-12408385536003780037875607938079436002.0
25-06-2013Mar-12Jun-13460431527004050040556708505085121601.0
20-01-2014Jun-13Jan-141784493170042200422357088620886
23-09-2014Jan-14Sep-1423847315004270042710508967089718861.0
03-02-2015Sep-14Feb-15129486060043300433126090930909
18-05-2015Feb-15May-15105496580044100441168092610926
15-07-2015May-15Jul-155850232004430044342093030930
28-09-2015Jul-15Sep-157751005004480044810509408094121001.1
21-01-2016Sep-15Jan-161155215150046300463315097230972
06-07-2016Jan-16Jul-16169538414004770047729401001701002
19-10-2016Jul-16Oct-169654802300500005004830105000105052002.6
01-03-2017Oct-16Mar-17120560018005180051837801087801088
18-05-2017Mar-17May-1713857386005240052412601100401100
23-11-2017May-17Nov-171015839600530005301260111300111330001.6
TOTALSSep-01Nov-175839530005301113001113

TLS data are unavailable for 2008. Mean recession rate is here calculated from incremental volumetric loss for each monitoring period by normalizing the monitoring period to 12 months and dividing by cliff height (17 m) and test section width (100 m). Whilst being an approximation in terms of cliff height, this is not a cliff-top recession rate.