IV. Retreatin~ Shorelines
269
Mid-1992, a profile nourishment restored the beach profile between the dike and
the feeder berm. Due to the distances to cover, a booster station and a double line
on the beach were put in place.
Upon completion, an area some 1,000 m (3,280 r) from the shoreline, about
3,000 m (9,840 r) long was surveyed.
A regression of 15% has been recorded, certainly due, in part, to some rough
weather conditions. A monitoring program studies beach slope evolution as a
function of time and weather conditions, and sand budget analysis. The
effectiveness of a beach nourishment-feeder berm combination as a new concept
of coastal protection will be assessed.
The works cover (in an area from De Haan west to Vlissegem), a distance of
2,150 m (7,052 fl). The fill volume to the new profile of the feeder berm
amounted to 245 mVm (131 r) bench. A bench was built with the reclaimed sand
on the dry section of the beach. The 40 m (2,653 ft3). The beach was thus raised
an average of one meter (3.28 r) wide stands above the mean highwater spring
tide level. Wind breakers on the dry sand protected again aeolean erosion (Fig.
32).
As part of the deepening of the access to the port of Ostend, sand, with grains of
about 200 micron in diameter, was dredged, transported and dumped to build the
feeder berm.
The De Haan project avowedly has three aims : keeping navigation channels
open in what is labeled the busiest sea-highway in the world and guaranteeing
access to the coastal harbors, providing flood protection on the shore and to the
adjoining hinterland, and addressing the needs of tourism and recreation.
Fig. 32 shows the relative position of the feeder (underwater) bar, the beach and
the upper beach berm (dry benched beach). High and low spring tides are
respectively (means) 4.74 and 0.21 m (18 and 0.69 ft).
269
Mid-1992, a profile nourishment restored the beach profile between the dike and
the feeder berm. Due to the distances to cover, a booster station and a double line
on the beach were put in place.
Upon completion, an area some 1,000 m (3,280 r) from the shoreline, about
3,000 m (9,840 r) long was surveyed.
A regression of 15% has been recorded, certainly due, in part, to some rough
weather conditions. A monitoring program studies beach slope evolution as a
function of time and weather conditions, and sand budget analysis. The
effectiveness of a beach nourishment-feeder berm combination as a new concept
of coastal protection will be assessed.
The works cover (in an area from De Haan west to Vlissegem), a distance of
2,150 m (7,052 fl). The fill volume to the new profile of the feeder berm
amounted to 245 mVm (131 r) bench. A bench was built with the reclaimed sand
on the dry section of the beach. The 40 m (2,653 ft3). The beach was thus raised
an average of one meter (3.28 r) wide stands above the mean highwater spring
tide level. Wind breakers on the dry sand protected again aeolean erosion (Fig.
32).
As part of the deepening of the access to the port of Ostend, sand, with grains of
about 200 micron in diameter, was dredged, transported and dumped to build the
feeder berm.
The De Haan project avowedly has three aims : keeping navigation channels
open in what is labeled the busiest sea-highway in the world and guaranteeing
access to the coastal harbors, providing flood protection on the shore and to the
adjoining hinterland, and addressing the needs of tourism and recreation.
Fig. 32 shows the relative position of the feeder (underwater) bar, the beach and
the upper beach berm (dry benched beach). High and low spring tides are
respectively (means) 4.74 and 0.21 m (18 and 0.69 ft).