Chapter II
Extreme Events
27
To facilitate the interpretation of the results obtained through the use of the peak over threshold
(POT) method, a table has been created to summarize the set of extreme heights obtained based
on the return periods of these extreme events in the future.
Table II-3 summarizing all the results obtained by the peak over threshold (POT) method
The peak over threshold (POT) method
Return
period
(years)
Return period (years)
W
WNW
NW
NNW
N
NNE
NE
ENE
Omni
2
4.83
4.30
4.24
4.15
4.25
4.64
3.34
3.01
5.51
5
5.38
4.70
4.88
4.73
4.93
5.30
3.86
3.42
6.17
10
5.79
4.94
5.36
5.16
5.44
5.81
4.25
3.73
6.67
20
6.21
5.14
5.85
5.60
5.95
6.31
4.64
4.04
7.17
30
6.45
5.24
6.13
5.86
6.25
6.61
4.87
4.22
7.46
50
6.75
5.35
6.49
6.18
6.63
6.98
5.16
4.45
7.82
100
7.16
5.47
6.97
6.62
7.14
7.49
5.56
4.76
8.32
500
8.12
5.69
8.10
7.64
8.33
8.66
6.47
5.48
9.48
1000
8.54
5.75
8.58
8.08
8.85
9.16
6.86
5.79
9.97
Table II-3 presents the results obtained by the peak over threshold (POT) method for predicting
wave heights. The table provides insights into the likelihood of extreme wave events in different
directions based on the return periods.
The findings indicate that the East north east direction is the least likely to generate extreme
waves heights. For example, at a 1000-year return period, the wave height in the ENE direction
is recorded at 5.79 meters, which is the lowest value among all directions for that return period.
In contrast, the North Northeast (NNE), North (N), Northwest (NW), and West (W) directions
are more likely to generate higher wave heights. For instance, at a 1000-year return period, the
wave heights recorded in these directions are as follows: NNE at 9.16 meters, N at 8.85 meters,
NW at 8.58 meters, and W at 8.54 meters. These indicate a higher propensity for extreme wave
events in these directions.
Of particular interest is the observation that the North Northeast (NNE) direction. The analysis
suggests that extreme waves are more likely to originate from this direction compared to others.
At a 1000-year return period, wave heights in the NNE direction reach 9.16 meters.
Diverging from the analysis of wave heights in individual directions, the examination of
omnidirectional wave heights reveals the most significant outcomes. By considering the
maximum wave heights attainable within the dataset, the omnidirectional analysis unveils the
highest values. For instance, at a return period of 1000 years, the wave height in the
omnidirectional direction reaches an impressive 9.97 meters, surpassing all other directions and
demonstrating the potential for extreme wave events in any direction.
Extreme Events
27
To facilitate the interpretation of the results obtained through the use of the peak over threshold
(POT) method, a table has been created to summarize the set of extreme heights obtained based
on the return periods of these extreme events in the future.
Table II-3 summarizing all the results obtained by the peak over threshold (POT) method
The peak over threshold (POT) method
Return
period
(years)
Return period (years)
W
WNW
NW
NNW
N
NNE
NE
ENE
Omni
2
4.83
4.30
4.24
4.15
4.25
4.64
3.34
3.01
5.51
5
5.38
4.70
4.88
4.73
4.93
5.30
3.86
3.42
6.17
10
5.79
4.94
5.36
5.16
5.44
5.81
4.25
3.73
6.67
20
6.21
5.14
5.85
5.60
5.95
6.31
4.64
4.04
7.17
30
6.45
5.24
6.13
5.86
6.25
6.61
4.87
4.22
7.46
50
6.75
5.35
6.49
6.18
6.63
6.98
5.16
4.45
7.82
100
7.16
5.47
6.97
6.62
7.14
7.49
5.56
4.76
8.32
500
8.12
5.69
8.10
7.64
8.33
8.66
6.47
5.48
9.48
1000
8.54
5.75
8.58
8.08
8.85
9.16
6.86
5.79
9.97
Table II-3 presents the results obtained by the peak over threshold (POT) method for predicting
wave heights. The table provides insights into the likelihood of extreme wave events in different
directions based on the return periods.
The findings indicate that the East north east direction is the least likely to generate extreme
waves heights. For example, at a 1000-year return period, the wave height in the ENE direction
is recorded at 5.79 meters, which is the lowest value among all directions for that return period.
In contrast, the North Northeast (NNE), North (N), Northwest (NW), and West (W) directions
are more likely to generate higher wave heights. For instance, at a 1000-year return period, the
wave heights recorded in these directions are as follows: NNE at 9.16 meters, N at 8.85 meters,
NW at 8.58 meters, and W at 8.54 meters. These indicate a higher propensity for extreme wave
events in these directions.
Of particular interest is the observation that the North Northeast (NNE) direction. The analysis
suggests that extreme waves are more likely to originate from this direction compared to others.
At a 1000-year return period, wave heights in the NNE direction reach 9.16 meters.
Diverging from the analysis of wave heights in individual directions, the examination of
omnidirectional wave heights reveals the most significant outcomes. By considering the
maximum wave heights attainable within the dataset, the omnidirectional analysis unveils the
highest values. For instance, at a return period of 1000 years, the wave height in the
omnidirectional direction reaches an impressive 9.97 meters, surpassing all other directions and
demonstrating the potential for extreme wave events in any direction.