Petrolina

Petrolina is a municipality located in the southernmost point of the state of Pernambuco, in Northeast Brazil, in the valley of the São Francisco River. The population was 354,317 in 2020, and the total area is 4,756.8 km2,[3] making it the largest municipality in the state by area. The municipality is closely integrated with Juazeiro, Bahia, located on the opposite bank of the São Francisco. Formerly called Passagem de Juazeiro (lit. 'Passage of Juazeiro'), there is no single story explaining the origin of the name Petrolina. One theory is that the name was in tribute of Brazilian emperor Pedro I and his consort Leopoldina, while another asserts that Petrolina was named for a 'beautiful rock' (Portuguese: Pedra linda) found on the banks of the São Francisco.[4] The growth of Petrolina and its twin city Juazeiro in the late 20th century is the result of the construction of the Sobradinho Dam and the abundant availability of water for irrigation in these otherwise semi-arid soils. The region is perhaps the only one in the interior of the Northeast that has gained population through in-migration. While the population in the states of Pernambuco and Bahia as a whole increased by 50.1% between 1970 and 1990, it more than doubled in Petrolina-Juazeiro.[citation needed]