Chad Basin depth of . Due to heavy pumping, since the start of the 1980s the water levels in both aquifers has been lowered, and some wells no longer function. There is a third, much lower, aquifer in Bima Sandstones that lies at a depth of . Both the current and historical areas of the basin and the mega-basin contain concentrations of fossils. Fossil-fuels deposits in the area are estimated to exceed a trillion barrels in reserves. The Lake Chad Basin Commission was set up in 1964 by Cameroon, Chad, Niger and Nigeria, the four countries that contain parts of Lake Chad.
Chad yet occur in Chad. In 2006 and in 2008 rebel forces attempted to take the capital by force, but on both occasions failed. An agreement for the restoration of harmony between Chad and Sudan, signed 15 January 2010, marked the end of a five-year war. The fix in relations led to the Chadian rebels from Sudan returning home, the opening of the border between the two countries after seven years of closure, and the deployment of a joint force to secure the border. In May 2013, security forces in Chad foiled a coup against President Idriss Deby that had been