In geography, the term "confluence" refers to the meeting point of two or more bodies of water. This may be where a tributary flows into a main river, or where two rivers meet to form a river with a completely different name. This post presents a dozen confluences of rivers and other bodies of water from around the world, selected from photographs that best show the contrast of the two bodies of water.
(Total 10 photos)
1. The confluence of the rivers Rhone and Arve in, Switzerland. The river on the left is the Rhone, which emerges from Lake Leman. The river on the right is the Arve, which is fed by many of the glaciers of the Chamonix Valley and then flows northwest to join the Rhone on the west side of Geneva, where its higher silt content creates such a contrast. (I_let_my_dog_lick_my on Reddit)
2. The confluence of the rivers Ilz and Inn in Passau,. The Ilz is a relatively small mountain stream with blue water, and the Inn is a fairly large river flowing from Salzburg (above). There is more water in the river Inn than in the Danube, and yet a stream flows out of the city, which is called in one word - the Danube. This photo was taken from the Oberhaus fortress above the town of Passau in Lower Bavaria, Germany. The city is also called the "City of Three Rivers". (bk on Flickr)
3. The confluence of the Ohio and Mississippi rivers in Cairo, Illinois, USA. The Ohio River becomes a tributary of the Mississippi River south of Cairo, Illinois, a small town on a strip of land where the rivers meet (center). The brown, sediment-laden waters flowing northeast from the Ohio River are very different from the green and relatively clear waters of the Mississippi River (flowing northwest to south). The color of the rivers in this image differs from the usually green Ohio and brown Mississippi. This suggests that heavy rain in December 2005 in these areas resulted in more than normal levels of sediment in the rivers. The waters do not mix even after 5-6 km downstream. (NASA)
4. The confluence of the Jialing and Yangtze rivers in Chongqing,. The Jialing River on the right stretches for 119 km. In the city of Chongqing, it flows into the Yangtze River. The clear waters of Jialing meet the brown waters of the Yangtze. By absorbing the waters of Jialing, the Yangtze becomes even more powerful as it continues its journey and passes through the Three Gorges.
5. The confluence of the Rio Negro and Solimões near Manaus,. Rio Negro is a river with dark (almost black) water, and Solimões is a river with sand-colored waters. 6 km of water of two rivers flow side by side. This is one of the most famous attractions in Manaus, Brazil. And all because of the difference in temperature, flow velocity and density of water in the two rivers. Rio Negro flows at a speed of about 2 km per hour at a temperature of 28°C, and Solimões - 4-6 km per hour at a temperature of 22°C. (Immelman284)
6. The confluence of the Green and Colorado rivers in Canyonlands National Park, Utah, USA. The Green River is a very long stream in the Rocky Mountains. It winds its way south into Utah, turning east into the Colorado and then turning south again.
7. The confluence of the Thompson and Fraser rivers in Lytton, British Columbia,. The Thompson River (clear) ends at Lytton, Canada, where it flows into the Fraser River (muddy). (siacob on Flickr)
8. The confluence of the Alaknanda and Bhagirathi rivers at Devaprayag,. Devaprayag is a city in the Indian state of Uttarakhand. It is one of the five confluences of the Alaknanda River and the place where the Ganges River forms. Alaknanda rises at the confluence and foothills of the Satopanth and Bhagirath Kharak glaciers. The waters of the Bhagirathi river are formed at the foot of the Gangotri glacier.
9. The confluence of the Moselle and Rhine in Koblenz, Germany. At Koblenz, the Moselle flows into the Rhine. The name Koblenz itself means "Confluence". (PETER JANSEN @ Panoramio.com)
10. The confluence of the Drava and Danube rivers near the city of Osijek,. On the right bank of the Drava River, 25 km upstream from the confluence with the Danube, lies the town of Osijek. (WWF: Amazon of Europe)
In the southeast of France, at the confluence of the rivers Rhone and Saone, lies the ancient city of Lyon. As early as the 3rd century BC. e. Gallic tribes founded their settlement here, which was called Lugdun.
In 43 BC. e. the Romans came here. With their arrival, the settlement expanded, wooden and earthen buildings were replaced by stone ones. New houses, aqueducts, roads and baths are being built. Over time, Lugdun became the capital of Gaul, which ensured its prosperity. Roman buildings in the city have survived to this day. These are the ancient theatre, the Amphitheater of the Three Gauls, the large baths and four aqueducts. The Museum of Gallo-Roman Civilization houses ancient mosaics.
In 197, the gradual decline of the city began. In the 5th century it was sent to be the capital of Gaul. In the Middle Ages, it was often raided by robbers. Many wanted to claim the city as their own, including the German Empire and the Catholic Church. And this did not contribute to the flourishing.
The situation changed only in the 15th century. By decree of the king, since 1420, fairs were allowed to be held in the city. Italian bankers and merchants immediately began to come here. They built houses in the Italian style. There was not enough space, so the streets were very narrow and winding.
To make it easier to get from one street to another, the so-called traboules were built - corridors that pierced through some buildings. This is a unique invention. Traboules were in the form of straight corridors, spiral and ordinary ladders. Now many of them are privately owned and closed to the public, but there are some that you can walk through at a certain time.
As in any other ancient city, Lyon has Old city. It is located at the foot of the Fourvière hill, on top of which is the Basilica of Notre-Dame-de-Fourvière. It was built in 1872-1896. From here you have a magnificent view of the city. There is another attraction on the top of the hill - a metal tower, which is a copy of the third tier of the Eiffel Tower. It was built in 1892-1894 and now "serves" as a television antenna.
The old medieval city of Lyon is one of the largest and most integral quarters of the Renaissance. In 2011 he was listed world heritage UNESCO.
Survived from the 12th century Cathedral Saint Jean. Here is now the residence of the Archbishop of Lyon. There is also an astronomical clock in the cathedral that strikes the time at twelve o'clock in the afternoon.
There is also a medieval hospital Hotel-Dieu in the city. During its long existence, this complex of buildings was rebuilt many times.
There are many squares in Lyon. Some of them are many years old. Place Bellecour with its chestnut alleys, gardens and the equestrian statue of Louis XIV makes an indelible impression.
Between the rivers Rhone and Saone lies the Presqu'ile peninsula. This is the center of Lyon. Here is the city hall, museums, the Opera, the Celestin theater, numerous boutiques, bars and restaurants.
The inhabitants of Lyon love holidays. Since the middle of the 19th century, a festival of light has been held in December. This is a festival of illuminations, when residents put candles on the windows, and thousands of lamps, lights, lanterns and lamps are lit on all the streets. This event is very popular with tourists.
Every summer in the open air in the ancient theater of Fourviere, built in 15 BC. e., there is a festival of music, theater and cinema called Nuits de Fourviere.
In geography, the term "confluence" refers to the meeting point of two or more bodies of water. This may be where a tributary flows into a main river, or where two rivers meet to form a river with a completely different name. This post presents a dozen confluences of rivers and other bodies of water from around the world, selected from photographs that best show the contrast of the two bodies of water.
1. The confluence of the rivers Rhone and Arves in Geneva, Switzerland. The river on the left is the Rhone, which emerges from Lake Leman. The river on the right is the Arve, which is fed by many of the glaciers of the Chamonix Valley and then flows northwest to join the Rhone on the west side of Geneva, where its higher silt content creates such a contrast. (I_let_my_dog_lick_my on Reddit)
2. The confluence of the rivers Ilz and Inn in Passau, Germany. The Ilz is a relatively small mountain stream with blue water, and the Inn is a fairly large river flowing from Salzburg (above). There is more water flow in the river Inn than in the Danube, and yet a stream flows out of the city, which is called in one word - the Danube. This photo was taken from the Oberhaus fortress above the town of Passau in Lower Bavaria, Germany. The city is also called the "City of Three Rivers". (bk on Flickr)
3. The confluence of the Ohio and Mississippi rivers in Cairo, Illinois, USA. The Ohio River becomes a tributary of the Mississippi River south of Cairo, Illinois, a small town on the strip of land where the rivers merge (center). The brown, sediment-laden waters flowing northeast from the Ohio River are very different from the green and relatively clear waters of the Mississippi River (flowing northwest to south). The color of the rivers in this image differs from the usually green Ohio and brown Mississippi. This suggests that heavy rain in December 2005 in these areas resulted in more than normal levels of sediment in the rivers. The waters do not mix even after 5-6 km downstream. (NASA)
4. The confluence of the Jialing and Yangtze rivers in Chongqing, China. The Jialing River on the right stretches for 119 km. In the city of Chongqing, it flows into the Yangtze River. The clear waters of Jialing meet the brown waters of the Yangtze. By absorbing the waters of Jialing, the Yangtze becomes even more powerful as it continues its journey and passes through the Three Gorges.
5. The confluence of the Rio Negro and Solimões near Manaus, Brazil. The Rio Negro is a river with dark (almost black) water, and the Solimões is a river with sand-colored waters. 6 km of water of two rivers flow side by side. This is one of the most famous attractions in Manaus, Brazil. And all because of the difference in temperature, flow velocity and density of water in the two rivers. Rio Negro flows at a speed of about 2 km per hour at a temperature of 28°C, and Solimões - 4-6 km per hour with a temperature of 22°C. (Immelman284)
6. The confluence of the Green and Colorado rivers in Canyonlands National Park, Utah, USA. The Green River is a very long stream in the Rocky Mountains. It winds its way south into Utah, turning east into the Colorado and then turning south again.
7. The confluence of the Thompson and Fraser rivers in Lytton, British Columbia, Canada. The Thompson River (clear) ends at Lytton, Canada, where it flows into the Fraser River (muddy). (siacob on Flickr)
8. The confluence of the Alaknanda and Bhagirathi rivers in Devaprayag, India. Devaprayag is a city in the Indian state of Uttarakhand. It is one of the five confluences of the Alaknanda River and the place where the Ganges River forms. Alaknanda rises at the confluence and foothills of the Satopanth and Bhagirath Kharak glaciers. The waters of the Bhagirathi river are formed at the foot of the Gangotri glacier.
9. The confluence of the Moselle and Rhine in Koblenz, Germany. At Koblenz, the Moselle flows into the Rhine. The name Koblenz itself means "Confluence". (PETER JANSEN @ Panoramio.com)
10. The confluence of the Drava and Danube rivers near the city of Osijek, Croatia. On the right bank of the Drava River, 25 km upstream from the confluence with the Danube, lies the town of Osijek. (WWF: Amazon of Europe)
11. The confluence of one of the tributaries into the Uruguay River in the Argentine province of Misiones.
Confluence of the Rhone and Arve rivers in Geneva, Switzerland
The Rhone river on the left, which flows from Lake Leman, on the right, the Arve receives water from the glaciers of Chamonix. The Arve has a deeper muddy layer at the bottom, which is why its waters contrast so strongly with the Rhone.
Confluence of the Thompson and Fraser Rivers, British Columbia, Canada
The Fraser River is fed by the waters of the mountains and therefore has more muddy water than the Thompson River flowing through the plains.
Confluence of the Green and Colorado Rivers in the National Park, Utah, USA
The Green River is formed in the Rocky Mountains of Sublette Forest National Park, Wyoming. It winds south into Utah, turns east into Colorado, and finally back south into Utah, where it ends at the confluence with the Colorado River. The colors of the water differ due to the differences in the rocks washed out by them.
Confluence of Ohio and Mississippi, USA.
The waters of these rivers do not mix and have a clear boundary at a distance of almost 6 km.
Confluence of Alaknanda and Bhagirathi rivers, India
In the area of the city of Devprayag, two rivers merge, feeding their waters with glaciers at the foot of the Himalayas. These two sacred rivers later form the Ganges River.
Confluence of Rio Negro and Rio Solimões, Manaus, Brazil
This phenomenon is associated with differences in temperature, speed and water density of the two rivers. The Rio Negro on the right bears sand-coloured water mingling with the almost black waters of the Rio Solimões
Confluence of Jialing and Yangtze Chongqing, China
The Jialing River, 119 kilometers long, flows into the Yangtze River in Chongqing on the right. Pure water contrasts strongly with the brown-yellow waters of Yangtze
Confluence of the Moselle and Rhine rivers in the city of Koblenz, Germany
Confluence of the Drava and Danube rivers, Osijek, Croatia
Six miles from Manaus in Brazil, one of the greatest manifestations of the majesty of nature can be seen - the confluence of two colorful rivers - the Rio Negro and the Solimões. When meeting, the colored waters do not mix, but continue on their way side by side, while each river remains with its own color.
The waters of the Rio Negro are darker, slower and much heavier than those of the Solimões. Temperature, density, water speed all separate these streams of water for more than 6 kilometers before they form the great Amazon. 
When you see the process of meeting the waters live, at first you can't believe your eyes. It's like two completely different horizons meeting each other - the sandy beige waters of one river and the black waters of another, meeting each other but not mixing.
This phenomenon is also explained by the difference in temperature and flow rate. Rio Negro flows at a speed of 2 kilometers per hour and a temperature of 28 degrees Celsius, and Solimões at a speed of 4 to 6 kilometers and a temperature of 22 degrees Celsius 
The surrounding nature is also impressive - the Amazon rainforests, the lungs of our planet, which have a direct impact on the Earth's atmosphere. These places are famous for their huge variety of flora and fauna. Not surprisingly, this is one of the most popular tourist destinations not only in Brazil, but throughout South America
Read about the unique National Parks of Brazil in a separate collection with many interesting photos and facts.