The Douro is the highest-flow river of the Iberian Peninsula. It rises near Duruelo de la Sierra in Soria Province, central Spain, meanders south briefly then flows generally west through the north-west part of central Spain and into northern Portugal, to its mouth at Porto, the second largest city of Portugal. At its mouth it meets the Atlantic Ocean.
Saint Anthony Falls, or the Falls of Saint Anthony located at the northeastern edge of downtown Minneapolis, Minnesota, is the only natural major waterfall on the Mississippi River. Throughout the mid-to-late 1800’s, various dams were built atop the east and west faces of the falls to support the milling industry that spurred the growth of the city of Minneapolis. In 1880, the central face of the falls was reinforced with a sloping timber apron to stop the upstream erosion of the falls. In the 1950s, the apron was rebuilt with concrete, which makes up the most visible portion of the falls today. A series of locks were constructed in the 1950s and 1960s to extend navigation to points upstream.
The São Francisco River is a large river in Brazil. With a length of 2,914 kilometres (1,811 mi), it is the longest river that runs entirely in Brazilian territory, and the fourth longest in South America and overall in Brazil. It used to be known as the Opara by the indigenous people before colonisation, and is today also known as "Velho Chico".
The Paraná River is a river in south-central South America, running through Brazil, Paraguay, and Argentina for some 4,880 kilometres (3,030 mi). Among South American rivers, it is second in length only to the Amazon River. It merges with the Paraguay River and then farther downstream with the Uruguay River to form the Río de la Plata and empties into the Atlantic Ocean.
Baixo Guandu is a municipality located in the Brazilian state of Espírito Santo that was founded on April 10, 1935 and established as a city on June 8, same year. The city's celebration day is April 10. Its population was 31,132 (2020) and its area is 918 km². The area is most well known for its exports of coffee, especially from the high mountains of the district of Alto Mutum Preto. The main watercourse through the municipality is the Rio Doce river whose basin is composed of 222 municipalities.
Rio Grande is a river in south-central Brazil. It rises in the Mantiqueira Mountains in the state of Minas Gerais and descends inland, west-northwestward. Its lower course marks a portion of the Minas Gerais-São Paulo border. At the Mato Grosso do Sul state border, after a course of 1,090 km (677 mi), it joins the Paranaíba River to form the Upper Paraná River.
The Tietê River is a Brazilian river in the state of São Paulo.
The Paraíba do Sul, or simply termed Paraíba, is a river in southeast Brazil. It flows 1,137 km (706 mi) west to northeast from its farthest source at the source of the river Paraitinga to the sea near Campos dos Goytacazes. The river receives its name when it meets the river Paraibuna at the Paraibuna dam.
The Paranapanema River is one of the most important rivers of the interior of the Brazilian state of São Paulo. The river forms most of the boundary between the states of São Paulo and Paraná.
The Paranaíba River is a Brazilian river whose source lies in the state of Minas Gerais in the Mata da Corda mountains, municipality of Rio Paranaíba, at an altitude of 1,148 meters; on the other face of this mountain chain are the sources of the Abaeté river, tributary of the São Francisco River. The length of the river is approximately 1,000 kilometres (620 mi) up to the junction with the Grande River, both of which then form the Paraná River, at the point that marks the borders of the states of São Paulo, Minas Gerais, and Mato Grosso do Sul.
Barreiras is a city located in the west of the state of Bahia, Brazil. It is the most important urban, political, technological and economic center of the western region of the state. Its economy is based on livestock raising and agriculture. In recent years it has experienced an economic boom and is one of the fastest-growing cities in the state of Bahia if not in Brazil.
Paulo Afonso is a city in Bahia, Brazil. It was founded in 1958.
Delmiro Gouveia is a municipality located in the westernmost point of the Brazilian state of Alagoas. Its population is 52,262 (2020) and its area is 609 km².
Olho d'Água do Casado is a municipality located in the western of the Brazilian state of Alagoas. Its population is 9,441 (2020) and its area is 323 square kilometres (125 sq mi).
Canindé de São Francisco is a municipality located in the Brazilian state of Sergipe. Its population was 30,402 (2020) and its area is 902.2 km2 (348.3 sq mi).
Paulo Afonso Falls is a series of waterfalls on the São Francisco River in the north-east of Brazil adjacent to the city of Paulo Afonso.
Petrolândia is a municipality in the state of Pernambuco, Brazil. It is in the São Francisco Region. Petrolândia has a total area of 1056.6 square kilometers and had an estimated population of 36,901 inhabitants in 2020 according to the IBGE. It has one of the largest GDP per capita of Sertão due to the location of one hydroelectric power plant, property of CHESF.
The Xingó Dam is a concrete face rock-fill dam on the São Francisco River on the border of Alagoas and Sergipe, near Piranhas, Brazil. The dam was built for navigation, water supply and hydroelectric power generation as it supports a 3,162 megawatts (4,240,000 hp) power station. It was constructed between 1987 and 1994 and the last of its generators was commissioned in 1997. In Portuguese, the dam is called the Usina Hidrelétrica de Xingó.
The Paulo Afonso Hydroelectric Complex, also known as the Paulo Afonso Complex, is a system of three dams and five hydroelectric power plants on the São Francisco River near the city of Paulo Afonso in Bahia, Brazil. The complex exploits an 80-metre (260 ft) natural gap on the river, known as the Paulo Afonso Falls. Constructed in succession between 1948 and 1979, the dams support the Paulo Afonso I, II, III, IV and Apollonius Sales (Moxotó) power plants which contain a total of 23 generators with an installed capacity of 4,279.6 megawatts (5,739,000 hp).
The Rio São Francisco Natural Monument is a natural monument in the states of Alagoas, Bahia and Sergipe, Brazil. It protects a section of dramatic canyons on the São Francisco River and the surrounding caatinga environment, while supporting tourism and ecotourism.
Alagoas 
