Water resources in the Lake Chad basin are surface waters including bodies of running water (rivers, streams, canals, etc.) and bodies of standing water (lakes, reservoirs, permanent and temporary ponds, wadis, floodplains etc.) and groundwater mainly stored in the Quaternary and Pliocene aquifers. The two main river catchments in the basin are the Chari-Logone and the Komadugu-Yobé, whereby the Lake Chad receives most of its water from the Chari Logone rivers (around 95%). Seasonal floodplains, especially the Yaéré-Naga wetland contribute to an additional unknown volume of water flowing into the Lake Chad. Furthermore, they play an important role for the recharge of the groundwater resources, for the functioning of other ecosystems in the basin and are crucial for fishing, livestock farming and crop growing.