Saint Louis is located at the mouth of the Senegal River in a wetland area that extends for 10 kilometres westwards along the seafront to N’gallèle. It also extends inland into areas liable to periodic river flooding and rainfall. Some inhabited areas are subject to very high flood hazard due to the combination of frequency of intense rainfalls with impermeable soils and inadequate or no drainage networks.
The city’s many difficulties include the inadequate provision for managing wastewater, household waste and also rainwater and river water. This has been exacerbated by rapid urban growth, which has led people to cluster in areas at risk of flooding.
Expected activities include scenarios of floods, flash floods, sea level rise and other activities, including the possible implementation of multi risk models.