The floods at the end of 2003 led the Senegalese authorities to renovate the ‘Langue de Barbarie’, 7 km downstream of Saint-Louis, to facilitate the evacuation of the river flood to the sea. A process of intense erosion followed. Today the width of the ´breach´, which was initially 4 meters, has expanded over the years. The former mouth of the river to the south has been closed, while the excessive extension of the breach causes coastal erosion problems.
In 2012, it led to the abandonment of the village of fishermen of Doun Baba Dieye today engulfed by the sea. As the breach widened and progressed south, other riparian areas were in turn subject to erosion, as the littoral of the village of Pilote Barre.
On the other hand, on the north shore of the “Langue de Barbarie” on the riverside, an important sand inflow phenomenon started, with, in its progression towards the south, leading to new land reclaimed from the sea. These new areas of sandy soil, which is intended to be resolved with re-vegetation, present favourable conditions for the installation of farms since it has subsurface freshwater, attracting the interest of the inhabitants of the neighbouring towns, located on the other side of the river. However, these began to exploit various plots, leading to an uncontrolled occupation of these fragile spaces.
As for the southern end of the “Langue de Barbarie”, it is a rich environment, especially for avifauna, with alternating dunes and small brackish water lagoons. This site is included in the perimeter of the Marine Protected Area of Saint Louis.
A project to strengthen national biodiversity and environmental initiatives with sustainable conservation strategies, was launched, in the different eco-geographical zones of Senegal, including Saint Louis, as part of a common strategy to protect farming and nature plots against strong swells that threaten to destroy crops and make populations even more vulnerable. In this regard, the capitalization and dissemination of good practices of nature resources management developed by local communities are gathered and aim to respond to the coastal erosion.
The challenges and adaptation action needs of the “Langue de Barbarie” are many and varied. These include, among others:
The project has played an important role in trapping wind-blown sand and shows that the design works and reached the expectations.
Some of the key results involve:
Impacts of good practices