Abstract
Every year during the winter season, several regions of Guinea (Conakry) are damaged, and losses due to flooding are recorded.
This problem is the result of an increase of the sea waters level firstly, and the flooding of coastal rivers on the other hand. So the
measure of water levels and the mapping of flood areas using geographical information systems became essential for civil
protection. The present article investigates the alternatives to delineate those areas, on the basis of the results of previous studies
which offer a better knowledge and understanding of flood risk in the area of Maritime Guinea.