lfttre participatory work had been carried out after the 2013/14
stormg Scenario 2b (extr,eme presentdayevent) corld in theory be
hoeased by 03 m ti.e. to add on tlrc 1.4 m skew surge of 28 October
2013, to the HAT level). firis wotrld genenrte a high water equal to
Scenario 3, (and in rctm period terms wsrld be in orcess of a 1 in
lfiX) year level! Smnrio 3 is 035 m larger than the 14 February
2014 evenL hence it can be mainained ttlat Scenilio 3 remains a
rcasmable droie for discussion of the impacts of SLR for the vis-
ualisation Horeryer, in view of the nenrcr surge obsenntions and
laryer knorn possibilities of SI& the larger nnge of scenarios
prcvided here prwHes relewnt addifiond information. If the
higtrcst observed sea level of 14 Febnrary 2014 occurrcd with 0.3 m
SIR there is a 7(l!U increase ir the total properties flooded, and a
24Ol[ increase in those flooded b >0.5 m depth. These numbers
increase to ll0i[ end :f5X respectlvety ririth O.5 m SI..R,
AppuachirU sca larcls of 29mODN, there is a pronotrnced increase
in tte number of properties Rooded b (the raffnr more serrere)
depths of >t rn This is equivalent to an approL 0.7 m SLR added ro
ttre 14 Febmary 2IJl4 or only 0.5 m S1& if a tevf more elftretne
version of Scenario 2b were to be created using highest tide (HAI)
plus a 1.4 m surge. The new information ftom the 2013/14 flood
events higruights the imporhnce of producing a wider range of
flood outlines
- to view tAe sensitivity of predicted imPacts to
extreme sea level events. After the visualisation and the 20l3ll4
storms, an updated docunent about flood e
enB and adaption in
Yarmouth was issued (YCDWG, 2014).