Cartographie des faciès morphologiques des fonds d'une lagune (estuarienne fermée) côtière : lA lagune Ouladine À Grand-Bassam (Côte d'Ivoire)

The objective of this study is to determine the morphological characteristics of the estuarine complex Ouladine lagoon - Comoé River on the Ivorian Coast in Grand Bassam (Ivory Coast, West Africa) to end to identify the mechanisms that take place there. Data’s quests on the study area enabled to reveal, in regard to morphology, certain heterogeneity of funds. The bedlagoon varied from 0 to 13.71 meters with an average of 6.86 meters. The great depths of 5 to 13.71 meters are located at the entrance of the Comoé river and the Ebrié lagoon, along the western arm of the Bouët island. These depths are the result of an erosion of this section caused by turbulent waters during the flood of Comoé river. The average depths of 2.5 to 5 meters are located in the western zone of the lagoon. The shallow depths are located after the island of Azuretti until the neighborhood bridge of France area, where a depression zone is observed up to 7.2 meters. Since the closure of the estuary, this section parallel to the coastline to the mouth closed, acts as a receptacle. On the whole surface of the lagoon we watch two channels perpendicular asymmetrical, one of West-east direction and the other north-south direction which are dotted with depressions and shallow. From radial’s study, we observe facies equivalent to wet or type "V" profile, type profiles "U", and intermediate-type profiles.