In Senegal, but more globally in the entire Sahelian region, water
problems are increasingly worrying for populations and ecosystems.
Indeed, this region is subject to a rainfall regime of only 3-4 months
followed by a complete dry period of 8-9 months.
As part of its
territorial diagnosis, the IRHA located existing water points in the
Sine Saloum region, Senegal. These water points, locally called marigots
are essential for the watering of livestock but also for all wild
Unfortunately, because of the extreme heat, hot
wind and intense sunlight, these marigots often dry up 4-5 months after
the end of the rainy season, forcing animals and pastoralists to migrate
in search of water.
Within the framework of the project "A
Koeallè no Maagolé (The Forest of the Sea)" financed by the Audemars
Piguet Foundation, IRHA, in partnership with Océanium Dakar and APAF
Senegal, has implemented the reinforcement of these water points under
the concept of boulis (see attached scheme diagram). This concept comes
from nature observation where the presence of vegetation along the edge
of a pond limits the evaporation of water and thus perpetuates these
The boulis intends to create a permanent vegetation
around the water point, limiting the wind evaporation (linked to the
hot wind blowing on the surface of the water), generating a
micro-climate favorable to the ambient humidity (thanks to the
evapotranspiration of the plants) but also allows the populations to
produce essential fodder for their livestock.
Thus, the action
led by IRHA and its partners is essential to stabilize the water points,
protecting biodiversity and local populations.
Technical scheme (in french)