What countries are there in the Amazon basin?

The Amazon River flows through Peru, Ecuador, Colombia, Venezuela, Guyana, Suriname, Bolivia and Brazil, and finally flows into the Atlantic Ocean in Brazil.

It has a total length of more than 6,400 kilometers and thousands of tributaries. Together with the main stream, it forms the Amazon River system with a total length of more than 60,000 kilometers, with a drainage area of 7.05 million square kilometers, most of which are in Brazil. Because it is rainy near the equator and rich in water all the year round, it is the widest and largest river in the world, and Brazilians proudly call it "river and sea".

In northern Brazil, the Amazon River is 45 meters deep and 3000 meters wide, and its flow rate is slow. Islands and continents crisscross in the river, and rivers are distributed in a network. The floodplain on both sides of the river is 30 ~ 100 km wide, with low terrain, dense lakeside and poor drainage. There are many tributaries on both sides of the river, all of which originate from the eastern slope of the Andes and are feathered. At the end of the middle reaches, the river channel is 1 1km wide and 99m deep.

The downstream reaches 1600 km, sometimes the water depth is wide, the terraces on both banks are clear, the terrain is low and flat, and the floodplain is dotted with lakes, sometimes the water surface is tight and the water flow is accelerated. The mouth of the sea is 330 kilometers wide, and the tides in the Atlantic Ocean can go up downstream, reaching as far as 1600 kilometers.

The Amazon River finally empties into the Atlantic Ocean.

Extended data

The Amazon river basin is high in the west and low in the east, high in the south and low in the north. The upstream source is the Andes and the alluvial system along the Pacific coast, with an altitude of more than 3000 meters; Both sides of the main stream are mostly Andes alluvium and inland alluvium below 200 meters. To the north is the Guiana Plateau (300-400 meters above sea level) and to the south is the Brazilian Plateau (300- 1500 meters above sea level).

Amazon river basin is a huge depression, which was a sunken deep-sea trough before Cenozoic, and was later filled with a lot of sediments. This huge depression spreads out in a skirt in the upper reaches of the Amazon River. Located between two ancient but not too high crystal plateaus: the rugged Guiana Plateau in the north and the Lower Brazil Plateau in the south.

The Amazon river basin was a huge freshwater lake in the late Pleistocene. At a certain time, it burst into the Atlantic Ocean, and the big river and its tributaries plunged into the bottom of the Pliocene lake.

Baidu Encyclopedia-Amazon River