Table 4

Table 4. Assignment of relative risk factors for elevation, shoreline displacement,
local subsidence trend, tidal range, and wave height.

Variable: Very low
1 Low
2 Moderate
3 High
4 Very high
5

Mean elevation (m) > 30 > 20
and
< 30 > 10
and
< 20 > 5
and
< 10 > 0
and
< 5

Mean shoreline
displacement
(m/year) > 2.0
accretion > 1
and
< 2 > -1
and
< +1 > 2
and
< -1 > -2
and
Erosion

Local subsidence
trend (mm/year) < -1
Land rising > -1
and
< 1 > 1
and
< 2 > 2
and
< 4 > 4.0
Land
sinking

Mean tidal range (m) < 1.0
Microtidal > 1
and
< 2 > 2
and
< 4 > 4
and
< 6 > 6.0
Macrotidal

Maximum significant
wave height (m) > 0
and
< 3 > 3
and
< 5 > 5
and
< 6 > 6
and
< 6.9 > 6.9


Variable:	Very low 1	Low 2	Moderate 3	High 4	Very high 5

Mean elevation (m)	> 30	> 20 and < 30	> 10 and < 20	> 5 and < 10	> 0 and < 5
Mean shoreline displacement (m/year)	> 2.0 accretion	> 1 and < 2	> -1 and < +1	> 2 and < -1	> -2 and Erosion
Local subsidence trend (mm/year)	< -1 Land rising	> -1 and < 1	> 1 and < 2	> 2 and < 4	> 4.0 Land sinking
Mean tidal range (m)	< 1.0 Microtidal	> 1 and < 2	> 2 and < 4	> 4 and < 6	> 6.0 Macrotidal
Maximum significant wave height (m)	> 0 and < 3	> 3 and < 5	> 5 and < 6	> 6 and < 6.9	> 6.9