Chapter V
Hydraulic Performance
65
Run-up Calculation Results
The results of the Run-up level that the dikes will have to face according to the different wave
scenarios defined are presented in Table V-4 for Marina Algiers Case and Table V-5 for Port
Algiers Case.
In the proximity of the marina, the run-up of the majority of waves breaking on the dike slope
(Ru2%) varies between 3.12 m and 3.76 m; for the same conditions, some waves can reach a
run-up height (Ru99/100%) varying between 4.81and 5.79 m. The variation in run-up under
these conditions between Ru2% and Ru99/100% averages about 1.98 m. It can also be seen that
all waves have a run-up height lower than the level of the current section, which is 6 m.
In the Port of Algiers, near the Khireddine jetty, the run-up of most waves breaking on the dike
slope (Ru2%) varies between 5.03 m and 6.69 m. For the same conditions, some waves can
reach a run-up level (Ru99/100%) between 7.75 m and 10.31 m. On average, the run-up range
under these conditions, between Ru2% and Ru99/100%, is 3.28 m.
It can also be seen that all waves have a submersion level below the level of the current section,
which is 8.5m.
Table V-4 Run-up Calculation Results for Algiers Marina Case
Return period
(year)
í µí±¯ í µí²í µí²
(m)
A
B
Ru2%
(m)
Ru99/100%
(m)
Extent Run-up
(m)
2 years
0.90
-0.20
4.50
3.12
4.81
1.69
10 years
1.12
-0.20
4.50
3.60
5.55
1.95
50 years
1.13
-0.20
4.50
3.65
5.62
1.97
100 years
1.18
-0.20
4.50
3.76
5.79
2.03
Table V-5 Run-up Calculation Results for Algiers Port Case
Return period
(year)
í µí±¯ í µí²í µí²
(m)
A
B
Ru2%
(m)
Ru99/100%
(m)
Extent Run-up
(m)
2 years
1.36
-0.20
4.50
5.03
7.75
2.72
10 years
1.72
-0.20
4.50
6.07
9.34
3.28
50 years
1.82
-0.20
4.50
6.47
9.96
3.49
100 years
1.89
-0.20
4.50
6.69
10.31
3.61
V.3. Run-Down
The Run-down is often less important compared to the wave run-up. it defined asthe lower
extreme water level reached by a wave on a sloping structure is known as wave
run-down, Rd. Run-down is defined vertically relative to SWL and will be given as positive if
below SWL(CETMEF,2009). as shown in Figure V-1.
Run-down can be calculated with formulas in Table IV-8
Hydraulic Performance
65
Run-up Calculation Results
The results of the Run-up level that the dikes will have to face according to the different wave
scenarios defined are presented in Table V-4 for Marina Algiers Case and Table V-5 for Port
Algiers Case.
In the proximity of the marina, the run-up of the majority of waves breaking on the dike slope
(Ru2%) varies between 3.12 m and 3.76 m; for the same conditions, some waves can reach a
run-up height (Ru99/100%) varying between 4.81and 5.79 m. The variation in run-up under
these conditions between Ru2% and Ru99/100% averages about 1.98 m. It can also be seen that
all waves have a run-up height lower than the level of the current section, which is 6 m.
In the Port of Algiers, near the Khireddine jetty, the run-up of most waves breaking on the dike
slope (Ru2%) varies between 5.03 m and 6.69 m. For the same conditions, some waves can
reach a run-up level (Ru99/100%) between 7.75 m and 10.31 m. On average, the run-up range
under these conditions, between Ru2% and Ru99/100%, is 3.28 m.
It can also be seen that all waves have a submersion level below the level of the current section,
which is 8.5m.
Table V-4 Run-up Calculation Results for Algiers Marina Case
Return period
(year)
í µí±¯ í µí²í µí²
(m)
A
B
Ru2%
(m)
Ru99/100%
(m)
Extent Run-up
(m)
2 years
0.90
-0.20
4.50
3.12
4.81
1.69
10 years
1.12
-0.20
4.50
3.60
5.55
1.95
50 years
1.13
-0.20
4.50
3.65
5.62
1.97
100 years
1.18
-0.20
4.50
3.76
5.79
2.03
Table V-5 Run-up Calculation Results for Algiers Port Case
Return period
(year)
í µí±¯ í µí²í µí²
(m)
A
B
Ru2%
(m)
Ru99/100%
(m)
Extent Run-up
(m)
2 years
1.36
-0.20
4.50
5.03
7.75
2.72
10 years
1.72
-0.20
4.50
6.07
9.34
3.28
50 years
1.82
-0.20
4.50
6.47
9.96
3.49
100 years
1.89
-0.20
4.50
6.69
10.31
3.61
V.3. Run-Down
The Run-down is often less important compared to the wave run-up. it defined asthe lower
extreme water level reached by a wave on a sloping structure is known as wave
run-down, Rd. Run-down is defined vertically relative to SWL and will be given as positive if
below SWL(CETMEF,2009). as shown in Figure V-1.
Run-down can be calculated with formulas in Table IV-8