The map brings together some of the elements that contribute to the fluidity of the Sahel and the “flow” within it. The liminal Sahel, the core and the buffer zone indicate the continuous oscillation of the “Sahelian shore” between desert and humid climates. It is the breath of the Sahel, its expansion and contraction, depending on the alternation of rainy and dry periods. Among the representations of rivers, we have chosen the one relating to the human footprint to take into account (albeit only with an image) on the one hand the course of the main rivers and their role in connecting the different parts of the Sahel, and on the other hand the presence of human communities, which in some way also symbolises their flow and the “weight” they exert on water resources. Rivers carry with them another aspect of the Sahel's breath, that of the variability of floods and therefore of the change in the extent of seasonally flooded areas.