• São Francisco river: essential by the volume of water transported to the Semi-Arid Region of the San Francisco Hydrographic covers 521 counties in six states: Bahia, Minas Gerais, Pernambuco, Alagoas, Sergipe, Goiás, and the Federal District. With 2,700 km, the San Francisco River rises in the Serra da Canastra in Minas Gerais, and flows in a south-north from Bahia and Pernambuco, when you change your course to the southeast, reaching the Atlantic Ocean at the boundary between Alagoas and Sergipe. The drainage area covers 8% of the country and its vegetation includes fragments of Cerrado in headwater areas, the central portion Caatinga and Atlantic Forest in the area of your mouth. 25.795Mw of hydroelectric potential of the inventory, 10.395Mw are effective through the mills of Tres Marias, Queimado, Sobradinho, Itaparica, Paulo Afonso and Xingó Complex. The main tributaries of the San Francisco river, are Paraopeba, Abaeté, Rio das Velhas, Jequitaí, Paracatu, Urucuia, Verde Grande, Carinhanha, Corrente and Rio Grande, the latter being the tax inserted in the region studied.
