Chapter III
Numerical Modeling
39
associated with underlying rock formations. The rest of the basin exhibits bathymetry ranging
from -2 to -5.2 meters, displaying a gradual slope.
Bathymetry Outside the Marina:
• The outer section of the primary jetty displays closely spaced isobaths (-1.2 meters and -6
meters), indicative of a steep slope resulting from construction materials and the dike's
configuration.
• Towards the eastern side of the marina, isobaths appear relatively spaced apart (-1.6
meters to -6 meters), suggesting a regular seabed and smooth slope due to the presence of
a secondary jetty which obstructs longitudinal sediment transport from east to west,
leading to sediment accumulation and the formation of a new beach.
• To the west of the marina, the isobaths are also spaced apart (ranging from -1.6 meters to
-10 meters), reflecting a regular seabed with a smooth slope. This area benefits from
sediment supply originating from Oued El Harrach, located further west. The sediment
influx replaces sediment trapping on the east side, thus safeguarding the western beach
from erosion.
Figure III-4 Bathymetry of the Algiers Marina.
III.4. Penalizing directions
In the context of modeling the hydrodynamics of the study area, the Algerian Bay, specifically
the selected ports, the Port of Algiers and the Algiers Marina, we analyzed the "Infoplaza" wave
climate database. Through this analysis, we were able to identify the four most influential
directions on the evolution and stability of the port structures: NNW (north-northwest), N
(north), NNE (north-northeast), and NE (northeast). These directions correspond to return
periods of 2 years, 10 years, 30 years, and 100 years.
Numerical Modeling
39
associated with underlying rock formations. The rest of the basin exhibits bathymetry ranging
from -2 to -5.2 meters, displaying a gradual slope.
Bathymetry Outside the Marina:
• The outer section of the primary jetty displays closely spaced isobaths (-1.2 meters and -6
meters), indicative of a steep slope resulting from construction materials and the dike's
configuration.
• Towards the eastern side of the marina, isobaths appear relatively spaced apart (-1.6
meters to -6 meters), suggesting a regular seabed and smooth slope due to the presence of
a secondary jetty which obstructs longitudinal sediment transport from east to west,
leading to sediment accumulation and the formation of a new beach.
• To the west of the marina, the isobaths are also spaced apart (ranging from -1.6 meters to
-10 meters), reflecting a regular seabed with a smooth slope. This area benefits from
sediment supply originating from Oued El Harrach, located further west. The sediment
influx replaces sediment trapping on the east side, thus safeguarding the western beach
from erosion.
Figure III-4 Bathymetry of the Algiers Marina.
III.4. Penalizing directions
In the context of modeling the hydrodynamics of the study area, the Algerian Bay, specifically
the selected ports, the Port of Algiers and the Algiers Marina, we analyzed the "Infoplaza" wave
climate database. Through this analysis, we were able to identify the four most influential
directions on the evolution and stability of the port structures: NNW (north-northwest), N
(north), NNE (north-northeast), and NE (northeast). These directions correspond to return
periods of 2 years, 10 years, 30 years, and 100 years.