In:
Cahiers du Centre nantais de recherche pour l'aménagement régional, PERSEE Program, Vol. 41, No. 1 ( 1994), p. 179-185
Abstract:
The storm of the 16-17 December 1989 formed very large waves which overtopped, in the most exposed sectors, the crests of the dunes protecting the low-lying lands in the south of the Bigouden Country. The breaches which appeared and the sea water that rushed through them, occupied old coastal marshes drained in the last century. The inundation threatened the low-lying areas of Kerity and Lechiagat, where the sea penetrated along roads leading from the coast. In populated areas which had already been protected, strengthening has been carried out rapidly, sometimes by temporary expedients, as to the east of Kerity where the small breaches were sealed with seaweed stranded on the beach. Between Lechiagat and Lesconil, near Le Reun and Kersauz, the dune gave way at two points over a width of 100-200 m where it had been weakened by the quarries established behind the Crestline after the last war, and the sand was washed into the depressions left by the quarries. As soon as the water level began to fall, the sediments were bulldozed to form a new Crestline to prevent further flooding. Following this, the material dredged from the port of Guilvinec-Lechiagat has been used to strengther that barrier. These gravelly materials have been used for the enhancement of the coastline near Lechiagat, and advantage has been taken of the available stocks to backfill the coastline between Léchiagat and Kersauz, as well as raising the Crestline. The arenaceous materials and the rocks extracted from the port of Lesconil farther east have likewise been used to consolidate the dune coastline to the west of that port. To achieve that, excavated materials have been dumped in an old quarry and topped with sands put in reserve at the time of the initial stripping. After the storms of the winter of 1989-1990, the problems of defense against the sea to the west of Lesconil have therefore been overcome, thanks to these original solutions. The neighbouring communities, and in particular that of Loctudy, could imitate these solutions in order to avoid sea-walls and rock embankments.
Type of Medium:
Online Resource
ISSN:
0755-9232
DOI:
10.3406/canan.1994.1594
Language:
French
Publisher:
PERSEE Program
Publication Date:
1994
detail.hit.zdb_id:
225725-7
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