1. Amazon River (120,000 cubic meters per second)

The Amazon River is the river with the largest water volume and the largest drainage area in the world. It is 6,400 kilometers long, second only to the Nile River, and is the second longest river in the world. It has a drainage area of ​​7.05 million square kilometers. It is estimated that about 20-25% of all the water flowing on the earth's surface is in the Amazon River. The river mouth is 240 kilometers wide, and the flow during flooding is 180,000 cubic meters per second, which is 10 times that of the Mississippi River. The annual average flow at the river mouth is 120,000 cubic meters per second. The discharge is so large that the seawater within 160 kilometers of the shore becomes fresh.

2. Congo River (41,000 cubic meters per second)

The Congo River, also known as the Zaire River, is the second longest river in Africa and is located in Central Africa. The total length is about 4,700 kilometers, and the drainage area is about 3.7 million square kilometers. As it flows through both sides of the equator, it receives abundant rainfall from the northern and southern hemispheres in alternation, and has the characteristics of large water volume and small annual changes. The annual average flow at the estuary is 41,000 cubic meters per second, and the maximum flow is 80,000 cubic meters per second. If divided by flow, the flow of the Congo River is second only to the Amazon River, making it the second largest river in the world. The estuary forms a deep drowned valley, and the riverbed extends 150 kilometers to the bottom of the Atlantic Ocean, forming a vast freshwater ocean outside the estuary.

3. Yangtze River (30,500 cubic meters per second)

The Yangtze River is the longest river in Asia and China, with a total length of 6,300 kilometers; it originates from the Geladandong Snow Mountain, the main peak of the Tanggula Mountains on the Qinghai-Tibet Plateau, and is the third longest river in the world, second only to the Amazon River and the Nile River. The water volume is also the third in the world. The total basin area is 1.807 million square kilometers, the average annual water inflow into the sea is about 960 billion cubic meters, and the average annual flow at the estuary is 30,500 cubic meters per second.

4. La Plata River (25,370 cubic meters per second)

The La Plata River is 4,100 kilometers long and is the second largest river in South America after the Amazon River. The total basin area is 3.103 million square kilometers, the average annual flow at the estuary is 25,370 cubic meters per second, and the annual runoff is 800 billion cubic meters.